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1
Feature Request / Juno mayhaps
« on: September 18, 2017, 10:17:37 PM »

2
General Discussion / Apollo 17 checklist
« on: September 18, 2017, 04:31:27 PM »
Apollo 17


Official emblem of the Apollo 17 lunar landing mission.
Credits: NASA

Mission Objective
The lunar landing site was the Taurus-Littrow highlands and valley area. This site was picked for Apollo 17 as a location where rocks both older and younger than those previously returned from other Apollo missions, as well as from Luna 16 and 20 missions, might be found.
The mission was the final in a series of three J-type missions planned for the Apollo Program. These J-type missions can be distinguished from previous G- and H-series missions by extended hardware capability, larger scientific payload capacity and by the use of the battery-powered Lunar Roving Vehicle, or LRV.
Scientific objectives of the Apollo 17 mission included, geological surveying and sampling of materials and surface features in a preselected area of the Taurus-Littrow region; deploying and activating surface experiments; and conducting in-flight experiments and photographic tasks during lunar orbit and transearth coast. These objectives included deployed experiments, such as the Apollo Lunar Surface Experiments Package, or ALSEP, with a heat flow experiment; lunar seismic profiling, or LSP; lunar surface gravimeter, or LSG; lunar atmospheric composition experiment, or LACE; and lunar ejecta and meteorites, or LEAM. The mission also included lunar sampling and lunar orbital experiments. Biomedical experiments included the Biostack II experiment and the BIOCORE experiment.
Mission Highlights
At 9:15:29 a.m. GMT Dec. 7, 1972, the command and service module, or CSM, was separated from the S-IVB. Approximately 15 min later, the CSM docked with the lunar module, or LM. After CSM/LM extraction from the S-IVB, the S-IVB was targeted for lunar impact, which occurred Dec. 10, at 8:32:43 p.m. The impact location was approximately 84 nautical miles northwest of the planned target point and the event was recorded by the passive seismic experiments deployed on the Apollos 12, 14, 15 and 16 missions.
Only one of the four planned midcourse corrections was required during translunar coast. A midcourse correction made at 5:03 p.m. Dec. 8, was a 1.6 second service propulsion system burn resulting in a 10>:5 feet/second velocity change. Lunar orbit insertion was accomplished at 7:47:23 p.m. Dec. 10, placing the spacecraft into a lunar orbit of 170 by 52.6 nautical miles. Approximately four hours, 20 minutes later, the orbit was reduced to 59 by 15 nautical miles. The spacecraft remained in this low orbit for more than 18 hours, during which time the CSM/LM undocking and separation were performed. The CSM circularization maneuver was performed at 6:50:29 p.m. Dec. 11, which placed the CSM into an orbit of 70.3 by 54.3 nautical miles. At 2:35 p.m. Dec. 11, the commander and lunar module pilot entered the LM to prepare for descent to the lunar surface. At 6:55:42 p.m. Dec. 11, the LM was placed into an orbit with a perilune altitude of 6.2 nautical miles. Approximately 47 minutes later, the powered descent to the lunar surface began. Landing occurred at 7:54:57 p.m. Dec. 11, at lunar latitude 20 degrees, 10 minutes north, and longitude 30 degrees 46 minutes east. Apollo 17 was the last lunar landing mission. Three extravehicular activities, or EVAs, lasted a total of 22 hours, four minutes on the lunar surface. EVA No. 1 began at 11:54:49 p.m. Dec. 11, with Eugene Cernan egressing at 12:01 a.m. Dec. 12. The first EVA was seven hours, 12 minutes long and was completed at 7:06:42 a.m. Dec. 12. The second EVA began at 11:28:06 p.m. Dec. 12, and lasted seven hours, 37 minutes, ending at at 7:05:02 a.m. Dec. 13. The final EVA began at 10:25:48 p.m. Dec. 13, and ended at 5:40:56 a.m. Dec. 14.
The LM ascent stage lifted off the moon at 10:54:37 p.m. Dec. 14. After a vernier adjustment maneuver, the ascent stage was inserted into a 48.5 by 9.4 nautical mile orbit. The LM terminal phase initiation burn was made at 11:48:58 p.m. Dec. 14. This 3.2 second maneuver raised the ascent stage orbit to 64.7 by 48.5 nautical miles. The CSM and LM docked at 1:10:15 a.m. The LM ascent stage was jettisoned at 4:51:31 a.m. Dec. 15. Deorbit firing of the ascent stage was initiated at 6:31:14 a.m. Dec. 15, and lunar impact occurred 19 minutes, seven seconds later approximately 0.7 nautical miles from the planned target at latitude 19 degrees, 56 minutes north, and longitude 30 degrees, 32 minutes east. The ascent stage impact was recorded by the four Apollo 17 geophones, and by each ALSEP at Apollos 12, 14, 15 and 16 landing sites.
Ronald Evans performed a transearth EVA at 8:27:40 p.m. Dec. 17, that lasted one hour, six minutes, during which time he retrieved the lunar sounder film, as well as the panoramic and mapping camera film cassettes.

Apollo 17 hosted the first scientist-astronaut to land on moon: Harrison Schmitt. The sixth automated research station was set up. The lunar rover vehicle traversed a total of 30.5 kilometers. Lunar surface-stay time was 75 hours, and lunar orbit time 17 hours. Astronauts gathered 110.4 kilograms, or 243 pounds, of material.
Crew
Eugene A. Cernan, Commander
Harrison H. Schmitt, Lunar Module Pilot
Ronald E. Evans, Command Module Pilot

Backup Crew
John W. Young, Commander
Charles M. Duke Jr., Lunar Module Pilot
Stuart A. Roosa, Command Module Pilot

Payload
America (CM-114)
Challenger (LM-12)

Prelaunch Milestones
12/21/70 - S-IVB ondock at Kennedy
5/11/72 - S-IC ondock at Kennedy
6/20/72 - S-IU ondock at Kennedy
10/27/72 - S-II ondock at Kennedy

Launch
Dec. 7, 1972; 12:33 a.m. EST
Launch Pad 39A
Saturn-V SA-512
High Bay 3
Mobile Launcher Platform-3
Firing Room 1

The CSM, LM and S-IVB booster stage were inserted 11 minutes, 53 seconds after launch into an Earth parking orbit of 91.2 by 92.5 nautical miles. After two revolutions, at 8:45:37 a.m. GMT, Apollo 17 was inserted into translunar coast.
Orbit
Altitude: 105.86 miles
Inclination: 28.526 degrees
Orbits: 75 revolutions
Duration: 12 days, 13 hours, 52 minutes
Surface Time: 75 hours
Distance: 1,484,933.8 miles
Lunar Location: Taurus-Littrow
Lunar Coordinates: 20.16 degrees north, 30.77 degrees east

Landing
Dec. 19, 1972
Pacific Ocean
Recovery Ship: USS Ticonderoga



been a pleasure
other spacecraft and missions will be posted as we can have them closer to this forums search function if there is a need

Yall stay safe and Take Care   out

3
General Discussion / Apollo 16 checklist
« on: September 18, 2017, 04:12:08 PM »
Apollo 16


Apollo 16 mission patch
Credits: NASA

Mission Objective
Three primary objectives were (1) to inspect, survey, and sample materials and surface features at a selected landing site in the Descartes region; (2) emplace and activate surface experiments; and (3) conduct in-flight experiments and photographic tasks from lunar orbit. Additional objectives included performance of experiments requiring zero gravity and engineering evaluation of spacecraft and equipment.

The Descartes landing site is in a highlands region of the moon's southeast quadrant, characterized by hilly, grooved, furrowed terrain. It was selected as an outstanding location for sampling two volcanic constructional units of the highlands – the Cayley formation and the Kant Plateau. The Apollo Lunar Surface Experiments Package, or ALSEP, was the fourth such station to become operational after Apollos 12, 14 and 15.

Orbital science experiments were concentrated in an array of instruments and cameras in the scientific instrument module, or SIM, bay. Handheld Hasselblad 70mm still and Mauer 16mm motion cameras were used by the crew. Minor changes in surface extravehicular activity, or EVA, equipment were evaluated – a stronger clutch spring in the television camera drive mechanism to eliminate aiming problems experienced on Apollo 15, longer seat belts on the Lunar Roving Vehicle for better astronaut retention, continuous fluting of drill bits to eliminate bit binding due to extracta jamming, and the addition of a treadle and jack to aid in drill core removal from the lunar subsurface.

A significant addition to surface objectives was an ultraviolet stellar camera to return photography of the Earth and celestial regions in spectral bands not seen from Earth. Evaluation of the lunar rover through a "Grand Prix" exercise consisting of S-turns, hairpin turns and hard stops also was to be conducted. A final orbital objective was to launch a subsatellite into lunar orbit from the command and service module, or CSM, shortly before transearth injection.

The objective of the Particles and Fields, or P&F, subsatellite was to investigate the moon's mass and gravitational variations, particle composition of space near the moon, and interaction of the moon's magnetic field with that of Earth.

Mission Highlights
Apollo 16 lifted off at 12:54 p.m. EST April 16, 1972, from Launch Complex 39 at Kennedy Space Center in Florida. Two significant command and service module problems – one en route to the moon and one in lunar orbit – contributed to a delay in landing and a subsequent early termination of the mission by one day. An erroneous signal indicating guidance system gimbal lock during translunar coast was neutralized by real time programming change instructing the spacecraft computer to ignore input. After undocking of Casper and Orion, circularization burn of the CSM was delayed when backup circuit caused yaw oscillations of service propulsion system. Orion landing was held until engineers determined oscillations would not seriously affect CSM steering.

Lunar module, or LM, carrying John Young and Charles Duke touched down at Descartes about 276 meters northwest of planned point (8 degrees 59' 29"S, 15 degrees 30' 52"E) at about 9:24 p.m. EST April 20, about five hours, 43 minutes late. During 71 hours, two minutes surface stay, astronauts explored region on three EVAs totaling 20 hours, 14 minutes. First EVA included Lunar Roving Vehicle setup and ALSEP deployment. Heat flow experiment was lost when Young tripped on electronics cable, breaking it. Rover traverse took astronauts west to Flag Crater where they collected samples and photographed the area. Return drive was south of outbound track to Spook Crater where astronauts took first measurement with the lunar portable magnetometer, gathered samples, and took both panoramic and 500 mm telephotography. Just before returning to the lunar module, they deployed the solar wind composition experiment at the ALSEP site. EVA duration was about seven hours, 11 minutes with 2.5 miles driven in the rover.

Second EVA began with drive south to Stone Mountain, where surface and core samples were collected at two stations in the area of Cinco Craters, along with a trench sample, penetrometer measurements and photography. Traverse continued west, then north with stops at five additional stations for similar work. One station was deleted from the EVA plan because of time factors. Lunar portable magnetometer, or LPM, measurements were taken near Cinco. Crew returned to lunar module and ended second EVA after seven hours, 23 minutes and 6.9 miles on the rover.

Real-time flight planners deleted four stops from the third and final EVA because of time constraint in meeting ascent schedule. Astronauts drove north to North Ray Crater where "House Rock," inside the crater rim, was sampled. Returning south, the crew stopped at "Shadow Rock" for additional sampling, photography and LPM measurement. Final stop near the LM added samples and core tubes to the collection. Last LPM readings were taken at the rover parking site along with final rock samples. Closeout, including retrieval of solar wind composition, or SWC, and film from far ultraviolet camera/spectroscope, completed EVA after five hours, 40 minutes. Rover distance was 7.1 miles.

Thomas Mattingly orbited the moon with cameras and SIM bay instruments operating during the surface stay of Young and Duke. The results verified Apollo 15 data and provided information on lunar terrain not previously covered. Lunar liftoff came on time at 8:26 p.m. EST April 23, in view of the rover television camera. After normal rendezvous and docking, and transfer of crew samples and equipment, the lunar module was jettisoned. Attitude control was lost, eliminating the usual deorbit maneuver and planned impact. Because of problems noted earlier, planners elected to return the mission one day early. During transearth coast, Mattingly took an 83-minute spacewalk to retrieve film cassettes from the SIM bay. Normal entry and landing resulted in splashdown at 0 degrees 42' 0" S, 156 degrees 12' 49" W, just before 3 p.m. EST April 27. Total mission time was 265 hours, 51 minutes, five seconds. Young and Duke collected 209 pounds of samples and drove the rover 16.6 miles.

The Particles and Fields, or P&F, subsatellite was launched at 4:56 p.m. EST April 24. The orbital shaping maneuver was deleted, and it was ejected into a highly elliptical orbit, cutting its lifetime from one year to about one month. Normal operation continued until May 29, when it impacted the moon.

Crew
John W. Young, Commander
Charles M. Duke Jr., Lunar Module Pilot
Thomas K. Mattingly II, Command Module Pilot

Backup Crew
Fred Haise, Commander
Edgar D. Mitchell, Lunar Module Pilot
Stuart A. Roosa, Command Module Pilot

Payload
Casper (CM-113)
Orion (LM-11)

Prelaunch Milestones
7/1/70 - S-IVB ondock at Kennedy
9/17/71 - S-IC ondock at Kennedy
9/29/70 - S-IU ondock at Kennedy
9/30/70 - S-II ondock at Kennedy

Launch
April 16, 1972; 12:54:00:567 p.m. EST
Launch Pad 39A
Saturn-V SA-511
High Bay 3
Mobile Launcher Platform-3
Firing Room 1

Orbit
Altitude: 107.5 miles
Inclination: 32.54 degrees
Orbits: 64 revolutions
Duration: 11 days, one hour, 51 minutes
Surface Time: 71:02:13
Distance: 1,391,550 miles
Lunar Location: Descartes Highlands
Lunar Coordinates: 8.97 degrees south, 15.51 degrees east

Landing
April 27, 1972
Pacific Ocean
Recovery Ship: USS Ticonderoga

4
General Discussion / Apollo 15 checklist
« on: September 18, 2017, 04:08:26 PM »
Apollo 15

July 8, 2009

"Climb aboard the Lunar Rover..."
Crew
David R. Scott
Commander

James B. Irwin
Lunar Module Pilot

Alfred M. Worden
Command Module Pilot
Backup Crew
Richard F. Gordon Jr.
Commander

Harrison H. Schmitt
Lunar Module Pilot

Vance DeVoe Brand
Command Module Pilot
Payload
Endeavor (CM-112)
Falcon (LM-10)
Prelaunch Milestones
5/18/70 - S-II ondock at Kennedy
6/13/70 - S-IVB ondock at Kennedy
6/26/70 - S-IU ondock at Kennedy
7/6/70 - S-IC ondock at Kennedy
Launch
July 26, 1971; 9:34:00 a.m. EDT
Launch Pad 39A
Saturn-V AS-510
High Bay 3
Mobile Launcher Platform-3
Firing Room 1
Orbit
Altitude: 99.7 miles
Inclination: 29.679 degrees
Orbits: 74 revolutions
Duration: 12 days, 17 hours, 12 min
Distance: 1,274,137 miles
Lunar Location: Hadley-Apennine
Lunar Coordinates: 26.08 degrees north, 3.66 degrees east
Landing
Aug. 7, 1971
Pacific Ocean
Recovery Ship: USS Okinawa


Mission Objective
Apollo 15 was the first of the Apollo "J" missions capable of a longer stay time on the moon and greater surface mobility. There were four primary objectives falling in the general categories of lunar surface science, lunar orbital science and engineering-operational. The mission objectives were to explore the Hadley-Apennine region, set up and activate lunar surface scientific experiments, make engineering evaluations of new Apollo equipment, and conduct lunar orbital experiments and photographic tasks.

Exploration and geological investigations at the Hadley-Apennine landing site were enhanced by the addition of the Lunar Roving Vehicle, or LRV. Setup of the Apollo Lunar Surface Experiments Package, or ALSEP, was the third in a trio of operating ALSEPs (on Apollos 12, 14 and 15). Orbital science experiments were concentrated in any array of instruments and cameras in the scientific instrument module, or SIM, bay. Engineering and operational objectives included evaluation of modifications to the lunar module, or LM, made for carrying a heavier payload and for a lunar stay time of almost three days. Changes to the Apollo spacesuit and to the portable life support system, or PLSS, were evaluated, and performance of the Lunar Roving Vehicle and the other new J-mission equipment that went with it - lunar communications relay unit, or LCRU, and the ground-controlled television assembly, or GCTA.

Another major mission objective involved the launching of a Particles and Fields, or P&F, subsatellite into lunar orbit by the command and service module, or CSM, shortly before beginning the return-to-Earth portion of the mission. The subsatellite was designed to investigate the moon's mass and gravitational variations, particle composition of space near the moon and the interaction of the moon's magnetic field with that of Earth.







Mission Highlights
Apollo 15 launched from Launch Complex 39 at Cape Canaveral at 9:34 a.m. EDT, only 187 milliseconds off schedule. The translunar injection, or TLI, and hybrid transfer maneuvers were combined into a single "optimized TLI" S-IVB engine burn. A minor problem early in the mission involving a short circuit in a service propulsion engine, or SPS engine, firing switch was successfully cleared through revised procedures for the lunar orbit insertion, or LOI, and subsequent SPS maneuvers.

David Scott and James Irwin flew their LM to a perfect landing at 6:16 p.m. EDT July 30, at Hadley Rille about 1,500 feet north and east of the targeted landing point near a crater named Salyut. Landing approach over the Apennine Range - one of the highest on the moon - was at an angle of 26 degrees, the steepest approach yet used in Apollo missions. During three periods of extravehicular activity, or EVA, on July 31, and Aug. 1 and 2, Scott and Irwin completed a record 18 hours, 37 minutes of exploration, traveled 17.5 miles in the first car that humans have ever driven on the moon, collected more than 170 pounds of lunar samples, set up the ALSEP array, obtained a core sample from about 10 feet beneath the lunar surface, and provided extensive oral descriptions and photographic documentation of geologic features in the vicinity of the landing site during the three days (66 hours, 55 minutes) on the lunar surface.

On Aug. 2, LM Falcon fired its ascent stage engine and lifted off the moon for its rendezvous with command module, or CM, Endeavor. For the first time, the lunar liftoff was seen on Earth via the LRV television camera. The two spacecraft docked as Endeavor began its 50th lunar orbit. On the 74th revolution, the Particles and Fields subsatellite was spring-launched from the service module, or SM, SIM bay. On the next revolution, Aug. 4, a 2-minute, 21-second SPS burn put Apollo 15 on its path back to Earth. On Aug. 5, Alfred Worden became the first human to carry out a deep space EVA. He exited the CM, climbed toward the rear of the SM and retrieved film cassettes from the SIM bay cameras and returned to the CM. The entire operation was completed in 18 minutes (one hour had been scheduled in the flight plan). At approximately 4:46 p.m. EDT Aug. 7, Apollo 15 splashed down in the Pacific Ocean, about 335 miles north of Honolulu, ending a flight of 12 days, seven hours. The crew was picked up by helicopters from the prime recovery ship, the USS Okinawa, 6.32 miles from the targeted touchdown point. During the final stages of descent on its three main parachutes, the CM crew and shipboard observers noted one of the parachutes became only partially inflated following jettison of RSC fuel remaining on board. As a result of the loss of one parachute, the CM impacted at 21.8 mph, instead of the planned 19 mph.

Apollo 15 set several new records for crewed spaceflight: heaviest payload in a lunar orbit of approximately 107,000 pounds, maximum radial distance traveled on the lunar surface away from the spacecraft of about 17.5 miles (previous high was 2.1 miles on Apollo 14), most lunar surface EVAs (three) and longest total of duration for lunar surface EVAs (18 hours, 37 minutes - almost the total time spent in lunar orbit by Apollo 8), longest time in lunar orbit (about 145 hours; only two hours less than the entire Apollo 8 mission), longest crewed lunar mission (295 hours), longest Apollo mission (295 hours - previous high was 244 hours, 36 minutes on Apollo 12), the first satellite placed in lunar orbit by a crewed spacecraft, and first deep space and operational EVA.


5
General Discussion / Apollo 14 checklist
« on: September 18, 2017, 04:05:33 PM »
Apollo 14

July 8, 2009

"Shepard back in space..."
Crew
Alan B. Shepard Jr.
Commander

Edgar D. Mitchell
Lunar Module Pilot

Stuart A. Roosa
Command Module Pilot
Backup Crew
Eugene A. Cernan
Commander

Joe H. Engle
Lunar Module Pilot

Ronald E. Evans
Command Module Pilot
Payload
Kitty Hawk (CM-110)
Antares (LM-8)
Prelaunch Milestones
1/21/70 - S-IVB ondock at Kennedy
1/21/70 - S-II ondock at Kennedy
1/12/70 - S-IC ondock at Kennedy
5/6/70 - S-IU ondock at Kennedy
Launch
Jan. 31, 1971; 4:03 p.m. EDT
Launch Pad 39A
Saturn-V AS-509
High Bay 3
Mobile Launcher Platform-2
Firing Room 2
Orbit
Altitude: 118.55 miles
Inclination: 31.12 degrees
Orbits: 34 revolutions
Duration: nine days, two minutes
Distance: 1,150,321 miles
Lunar Location: Fra Mauro
Lunar Coordinates: 3.65 degrees south, 17.48 degrees west
Landing
Feb. 9, 1971
Pacific Ocean
Recovery Ship: USS New Orleans


Mission Objective
The primary objectives of this mission were to explore the Fra Mauro region centered around deployment of the Apollo Lunar Surface Scientific Experiments Package, or ALSEP; lunar field geology investigations; collection of surface material samples for return to Earth; deployment of other scientific instruments not part of ALSEP; orbital science involving high-resolution photography of candidate future landing sites; photography of deep-space phenomena, such as zodiacal light and gegenschein; communications tests using S-band and VHF signals to determine reflective properties of the lunar surface; engineering and operational evaluation of hardware and techniques; tests to determine variations in S-band signals; and photography of surface details from 60 nautical miles in altitude.







Mission Highlights
Apollo 14 launched at 4:03 p.m. EST. At approximately 3:41 p.m. ground elapsed time, or GET, difficulties were experienced in docking with the lunar module, or LM, and six attempts were required before a "hard dock" was achieved. An in-flight televised inspection of the docking mechanism revealed no apparent reason for the malfunction and the system appeared to be functioning normally.

Prior to the powered descent initiation, or PDI, for the Antares landing, a short in the LM computer abort switch was discovered, which could have triggered an undesired abort during the LM's descent. On Feb. 5, Antares made the most precise landing to date, approximately 87 feet from the targeted landing point. The landing point coordinates were 3 degrees, 40 minutes, 27 seconds south and 17 degrees, 27 minutes, 58 seconds west, midway between the Doublet and Triplet craters in the hilly uplands of the Fra Mauro crater, and about 110 miles east of the Apollo 12 landing site.

Due to communications system problems, the first period of extra vehicular activity, or EVA, began almost one hour later than scheduled with Commander Alan Shepard setting foot on the lunar surface at 114 hours, 31 minutes GET. The first of the two EVA periods included ALSEP deployment and lasted four hours, 49 minutes.

The second EVA on Feb. 6 began when the LM egress hatch was opened at 4:15 a.m. EST. During this EVA, Shepard and Edgar Mitchell moved more than half a mile from their LM, conducting selenological investigations, collecting samples and attempting to reach the rim of Cone crater, approximately 300 feet above the landing site. NASA personnel monitoring the EVA estimate that the two astronauts were within 50 to 75 meters of the crater rim when they were advised by mission control to collect samples at that spot and begin their traverse back to the LM. The second EVA lasted four hours, 35 minutes, resulting in a new mark for EVA time by a lunar landing crew: nine hours, 24 minutes. Shepard set a new distance-traveled record on the lunar surface of approximately 9,000 feet.

During the two traverses, the astronauts collected 94 pounds of rocks and soil for return to Earth. The samples were scheduled to go to 187 scientific teams in the United States, as well as 14 other countries for study and analysis.

Orbital science activities were conducted by Stuart Roosa during the lunar surface activities period. He experienced some difficulties with the high-resolution, motion-compensating Hycon Lunar Topographic Camera while attempting to photograph the Descartes area, the landing site planned for Apollo 16.

The liftoff of Antares from the lunar surface took place precisely on schedule. Rendezvous and docking occured only two minutes later than scheduled. The command module Kitty Hawk splashed down safely in the Pacific Ocean at 4:05 p.m. EST Feb. 9, exactly nine days and two minutes after launch. The actual landing point was only 1.02 nautical miles off its targeted point of about 765 nautical miles south of Samoa, and four miles from the prime recovery ship, the USS New Orleans. The mission duration from liftoff to splashdown was 216 hours, two minutes.


6
General Discussion / Apollo 13
« on: September 18, 2017, 04:01:32 PM »
Apollo 13


Apollo 13 insignia.
Credits: NASA

"Houston, we've had a problem..."
Mission Objective
Apollo 13 was supposed to land in the Fra Mauro area. An explosion on board forced Apollo 13 to circle the moon without landing. The Fra Mauro site was reassigned to Apollo 14.  

Mission Highlights
At 5 1/2 minutes after liftoff, John Swigert, Fred Haise and James Lovell felt a little vibration. Then the center engine of the S-II stage shut down two minutes early. This caused the remaining four engines to burn 34 seconds longer than planned, and the S-IVB third stage had to burn nine seconds longer to put Apollo 13 in orbit.

Days before the mission, backup lunar module pilot, Charles Duke, inadvertently exposed the crew to German measles. Command Module Pilot Ken Mattingly had no immunity to measles and was replaced by backup command module pilot, John Swigert.

Ground tests before launch indicated the possibility of a poorly insulated supercritical helium tank in the lunar module, or LM, descent stage, so the flight plan was modified to enter the LM three hours early in order to obtain an onboard readout of helium tank pressure.

The No. 2 oxygen tank, serial number 10024X-TA0009, had been previously installed in the service module of Apollo 10, but was removed for modification and damaged in the process. The tank was fixed, tested at the factory, installed in the Apollo 13 service module and tested again during the Countdown Demonstration Test at NASA's Kennedy Space Center beginning March 16, 1970. The tanks normally are emptied to about half full. No. 1 behaved all right, but No. 2 dropped to only 92 percent of capacity. Gaseous oxygen at 80 pounds per square inch was applied through the vent line to expel the liquid oxygen, but to no avail. An interim discrepancy report was written, and on March 27, two weeks before launch, detanking operations resumed. No. 1 again emptied normally, but No. 2 did not. After a conference with contractor and NASA personnel, the test director decided to "boil off" the remaining oxygen in No. 2 by using the electrical heater within the tank. The technique worked, but it took eight hours of 65-volt DC power from the ground support equipment to dissipate the oxygen. Due to an oversight in replacing an underrated component during a design modification, this turned out to severely damage the internal heating elements of the tank.

Apollo 13 was to be the third lunar landing attempt, but the mission was aborted after rupture of service module oxygen tank. Still, it was classified as a "successful failure" because of the experience gained in rescuing the crew. The mission's spent upper stage successfully impacted the moon.

During the first two days, the crew ran into a couple of minor surprises, but generally Apollo 13 was looking like the smoothest flight of the program. At 46 hours, 43 minutes Joe Kerwin, the capsule communicator, or Capcom, on duty, said, "The spacecraft is in real good shape as far as we are concerned. We're bored to tears down here." It was the last time anyone would mention boredom for a long time.

At 55 hours, 46 minutes, as the crew finished a 49-minute TV broadcast showing how comfortably they lived and worked in weightlessness, Lovell said, "This is the crew of Apollo 13 wishing everybody there a nice evening, and we're just about ready to close out our inspection of Aquarius and get back for a pleasant evening in Odyssey. Good night."

Nine minutes later, oxygen tank No. 2 blew up, causing the No. 1 tank to also fail. The command module's normal supply of electricity, light and water was lost, and they were about 200,000 miles from Earth.

The message came in the form of a sharp bang and vibration at 9:08 p.m. April 13. Swigert saw a warning light that accompanied the bang and said, "Houston, we've had a problem here." Lovell came on and told the ground that it was a main B bus undervolt.

Next, the warning lights indicated the loss of two of three fuel cells, which were the spacecraft's prime source of electricity. With warning lights blinking, one oxygen tank appeared to be completely empty and there were indications that the oxygen in the second tank was rapidly depleting.

Thirteen minutes after the explosion, Lovell happened to look out of the left-hand window and saw the final evidence pointing toward potential catastrophe. "We are venting something out into the... into space," he reported to Houston. Capcom Jack Lousma replied, "Roger, we copy you venting." Lovell said, "It's a gas of some sort." It was oxygen gas escaping at a high rate from the second, and last, oxygen tank.

The first thing the crew did, even before discovering the oxygen leak, was try to close the hatch between the CM and the LM. They reacted spontaneously, similar to a submarine crew, closing the hatches to limit the amount of flooding. First Swigert, and then Lovell, tried to lock the reluctant hatch, but the stubborn lid wouldn't stay shut. Exasperated and realizing that there wasn't a cabin leak, they strapped the hatch to the CM couch.

The pressure in the No. 1 oxygen tank continued to drift downward; passing 300 pounds per square inch, then headed toward 200 pounds per square inch. Months later, after the accident investigation was complete, it was determined that when the No. 2 tank blew up, it either ruptured a line on the No. 1 tank or caused one of the valves to leak. When the pressure reached 200 pounds per square inch, the crew and ground controllers knew they would lose all oxygen, which meant that the last fuel cell also would die.

At one hour, 29 seconds after the bang, Lousma said after instructions from Flight Director Glynn Lunney, "It is slowly going to zero, and we are starting to think about the LM lifeboat." Swigert replied, "That's what we have been thinking about too."

Ground controllers in Houston faced a formidable task. Completely new procedures had to be written and tested in the simulator before being passed up to the crew. The navigation problem had to be solved; essentially how, when and in what attitude to burn the LM descent engine to provide a quick return home.

With only 15 minutes of power left in the CM, Lousma told the crew to make their way into the LM. Haise and Lovell quickly floated through the tunnel, leaving Swigert to perform the last chores in the command module. The first concern was to determine if there were enough consumables to get home. The LM was built for only a 45-hour lifetime and it needed to be stretch to 90. Oxygen wasn't a problem. The full LM descent tank alone would suffice. In addition, there were two ascent-engine oxygen tanks and two backpacks full of oxygen that would never be used on the lunar surface. Two emergency bottles on top of those packs each had six or seven pounds in them. At LM jettison just before re-entry 28.5 pounds of oxygen remained, more than half of what was available after the explosion.

Power also was a concern. There were 2,181 ampere hours in the LM batteries. Ground controllers carefully worked out a procedure where the CM batteries were charged with LM power. All noncritical systems were turned off and energy consumption was reduced to 1/5, which resulted in having 20 percent of LM electrical power left when Aquarius was jettisoned. There was one electrical close call during the mission. One of the CM batteries vented with such force that it momentarily dropped off the line. Had the battery failed, there would have been insufficient power to return the ship to Earth.

Water was the main consumable concern. It was estimated that the crew would run out of water about five hours before Earth re-entry, which was calculated at around 151 hours. However, data from Apollo 11, which had not sent its LM ascent stage crashing into the moon as in subsequent missions, showed that its mechanisms could survive seven or eight hours in space without water cooling. The crew conserved water. They cut down to six ounces each per day, 1/5 of normal intake, and used fruit juices; they ate hot dogs and other wet-pack foods when they ate at all. The crew became dehydrated throughout the flight and set a record that stood up throughout Apollo: Lovell lost 14 pounds and the crew lost a total of 31.5 pounds, nearly 50 percent more than any other crew. Those stringent measures resulted in the crew finishing with 28.2 pounds of water, about 9 percent of the total.

Removal of carbon dioxide also was a concern. There were enough lithium hydroxide canisters, which remove carbon dioxide from the spacecraft, but the square canisters from the command module were not compatible with the round openings in the lunar module environmental system. There were four cartridges from the LM and four from the backpacks, counting backups. However, the LM was designed to support two men for two days and was being asked to care for three men for about four days. After a day and a half in the LM, a warning light showed that the carbon dioxide had built up to a dangerous level. Mission control devised a way to attach the CM canisters to the LM system by using plastic bags, cardboard and to tape all materials carried on board.

One of the big questions was, "How to get back safely to Earth?" The LM navigation system wasn't designed to help in this situation. Before the explosion at 30 hours, 40 minutes, Apollo 13 had made the normal midcourse correction, which would take it out of a free-return-to-Earth trajectory and put it on a lunar landing course. Now the task was to get back on a free-return course. The ground computed a 35-second burn and fired it five hours after the explosion. As they approached the moon, another burn was computed; this time a long five-minute burn to speed up the return home. It took place two hours after rounding the far side of the moon.

The command module navigational platform alignment was transferred to the LM, but verifying alignment was difficult. Ordinarily the alignment procedure uses an onboard sextant device, called the Alignment Optical Telescope, or AOT, to find a suitable navigation star. Then with the help of an onboard computer, it verifies the guidance platform's alignment. However, due to the explosion, a swarm of debris from the ruptured service module made it impossible to sight real stars. An alternate procedure was developed to use the sun as an alignment star. Lovell rotated the spacecraft to the attitude Houston had requested and when he looked through the AOT, the sun was just where it was expected. The alignment with the sun proved to be less than 1/2 a degree off. The ground and crew then knew they could do the five-minute P.C. + 2 burn with assurance, cutting the total time of their voyage to about 142 hours. At 73 hours, 46 minutes into the mission, the air-to-ground transcript describes the event:

Lovell: OK. We got it. I think we got it. What diameter was it?
Haise: Yes. It's coming back in. Just a second.
Lovell: Yes, yaw's coming back in. Just about it.
Haise: Yaw is in....
Lovell: What have you got?
Haise: Upper-right corner of the sun....
Lovell: We've got it! If we raised our voices, I submit it was justified.

Flight Director Gerald Griffin, a man not easily shaken, recalled: "Some years later I went back to the log and looked up that mission. My writing was almost illegible, I was so damned nervous. And I remember the exhilaration running through me: My God, that's the last hurdle - if we can do that, I know we can make it. It was funny because only the people involved knew how important it was to have that platform properly aligned." Yet Griffin barely mentioned the alignment in his change-of-shift briefing - "That check turned out real well" is all he said an hour after his penmanship failed him.

The trip was marked by discomfort beyond the lack of food and water. Sleep was almost impossible because of the cold. When the electrical systems were turned off, the spacecraft lost an important source of heat. The temperature dropped to 38 degrees Fahrenheit and condensation formed on all the walls.

The most remarkable achievement of mission control was quickly developing procedures for powering up the CM after its long, cold sleep. Flight controllers wrote the documents for this innovation in three days, instead of the usual three months. The command module was cold and clammy at the start of power-up. The walls, ceiling, floor, wire harnesses and panels were all covered with droplets of water. It was suspected conditions were the same behind the panels. The chances of short circuits caused apprehension, but thanks to the safeguards built into the command module after the disastrous Apollo 1 fire in January 1967, no arcing took place. Lovell recalled the descent to Earth, "The droplets furnished one sensation as we decelerated in the atmosphere: it rained inside the CM."

Four hours before landing, the crew shed the service module; mission control had insisted on retaining it until then because everyone feared what the cold of space might do to the un-sheltered CM heat shield. Photos of the service module showed one whole panel missing and wreckage hanging out, it was a mess as it drifted away. Three hours later, the crew left the lunar module Aquarius and then splashed down gently in the Pacific Ocean near Samoa.

After an intensive investigation, the Apollo 13 Accident Review Board identified the cause of the explosion. In 1965, the CM had undergone many improvements that included raising the permissible voltage to the heaters in the oxygen tanks from 28 to 65 volts DC. Unfortunately, the thermostatic switches on these heaters weren't modified to suit the change. During one final test on the launch pad, the heaters were on for a long period of time. This subjected the wiring in the vicinity of the heaters to very high temperatures (1000 F), which have been subsequently shown to severely degrade teflon insulation. The thermostatic switches started to open while powered by 65 volts DC and were probably welded shut. Furthermore, other warning signs during testing went unheeded and the tank, damaged from eight hours of overheating, was a potential bomb the next time it was filled with oxygen. That bomb exploded on April 13, 1970 - 200,000 miles from Earth.

Crew
James A. Lovell Jr., Commander
Fred W. Haise Jr., Lunar Module Pilot
John L. Swigert Jr., Command Module Pilot

Backup Crew
John W. Young, Commander
Charles M. Duke Jr., Lunar Module Pilot
John L. Swigert Jr., Command Module Pilot

Payload
Odyssey (CM-109)
Aquarius (LM-7)

Prelaunch Milestones
6/13/69 - S-IVB ondock at Kennedy
6/29/69 - S-II ondock at Kennedy
6/16/69 - S-IC ondock at Kennedy
7/7/69 - S-IU ondock at Kennedy

Launch
April 11, 1970; 1:13 p.m. CST
Launch Pad 39A
Saturn-V AS-508
High Bay 1
Mobile Launcher Platform-3
Firing Room 1

Orbit
Altitude: 118.99 miles
Inclination: 32.547 degrees
Earth Orbits: 1.5
Duration: five days, 22 hours, 54 minutes, 41 seconds
Distance: 622,268 miles

Landing
April 17, 1970
Pacific Ocean
Recovery Ship: USS Iwo Jima

7
General Discussion / Apollo 12
« on: September 17, 2017, 03:37:18 AM »
Apollo 12

"The Pinpoint Mission…"

This is the official crew insignia for Apollo 12, the United States' second lunar landing mission. The clipper ship signifies that the crew is all Navy and symbolically relates the era of the clipper ship to the era of space flight. As the clipper ship brought foreign shores closer to the United States and marked the increased utilization of the seas by this nation, spacecraft have opened the way to the other planets and Apollo 12 marks the increased utilization of space-based on knowledge gained in earlier missions. The portion of the moon shown is representative of the Ocean of Storms area in which Apollo 12 will land.
Credits: NASA

Crew
Charles Conrad Jr., Commander
Alan L. Bean, Lunar Module Pilot
Richard F. Gordon Jr., Command Module Pilot

Backup Crew
David R. Scott, Commander
James B. Irwin, Lunar Module Pilot
Alfred M. Worden, Command Module Pilot

Payload
Yankee Clipper (CM-108)
Intrepid (LM-6)

Prelaunch Milestones
3/9/69- S-IVB ondock at Kennedy
4/21/69 - S-II stage ondock at Kennedy
5/3/69 - S-IC stage ondock at Kennedy
5/8/69 - S-IU ondock at Kennedy

Launch
Nov. 14, 1969; 11:22 a.m. EDT
Launch Pad 39A
Saturn-V AS-507
High Bay 3
Mobile Launcher-2
Firing Room 2

Orbit
Altitude: 118.55 miles
Inclination: 32.54 degrees
Orbits: 45 revolutions
Duration: 10 days, four hours, 36 minutes, 25 seconds
Distance: 952,354 miles
Lunar Location: Ocean of Storms
Lunar Coordinates: 3.04 degrees south, 23.42 degrees west

Landing
November 24, 1969; 3:58:24 p.m. EST
Pacific Ocean
Recovery Ship: USS Hornet

Mission Objective
The primary mission objectives of the second crewed lunar landing included an extensive series of lunar exploration tasks by the lunar module, or LM, crew, as well as the deployment of the Apollo Lunar Surface Experiments Package, or ALSEP, which was to be left on the moon's surface to gather seismic, scientific and engineering data throughout a long period of time.

Other Apollo 12 objectives included a selenological inspection; surveys and samplings in landing areas; development of techniques for precision-landing capabilities; further evaluations of the human capability to work in the lunar environment for a prolonged period of time; deployment and retrieval of other scientific experiments; and photography of candidate exploration sites for future missions.

The astronauts also were to retrieve portions of the Surveyor III spacecraft, which had soft-landed on the moon April 20, 1967, a short distance from the selected landing site of Apollo 12.

The flight plan for Apollo 12 was similar to that of Apollo 11, except Apollo 12 was to fly a higher inclination to the lunar equator and leave the free-return trajectory after the second translunar midcourse correction. This first non-free-return trajectory on an Apollo mission was designed to allow a daylight launch and a translunar injection above the Pacific Ocean. It also allowed a stretch of the translunar coast to gain the desired landing site lighting at the time of LM descent, conserved fuel and permitted the Goldstone, Calif., tracking antenna to monitor the LM descent and landing.

In addition, the Apollo 12 flight plan called for the LM ascent stage to provide a measured seismic stimulus for the ALSEP seismic experiment. Following crew return to the command and service module, or CSM, a controlled burn of the remaining propellants in the empty ascent stage caused the stage to crash into the moon, providing a measurable seismic shock impulse.  

Mission Highlights
Apollo 12 launched from Cape Kennedy on Nov. 14, 1969, into a cloudy, rain-swept sky. Launch controllers lost telemetry contact at 36 seconds, and again at 52 seconds, when the Saturn V launch vehicle was struck by lightning. The booster's first stage continued firing, launching Apollo 12 into an initial Earth-parking orbit of 115 by 117.9 miles. After one-and-a-half revolutions, the electrical circuits were checked out and no significant problems were noted. Then, the S-IVB stage re-ignited for a second burn of five minutes, 45 seconds, placing Apollo 12 into an initial free-return translunar trajectory.

About 40 minutes later, the CSM Yankee Clipper separated from the S-IVB-SLA, transposed, and then docked with the LM Intrepid. This was televised on Earth. The S-IVB stage was then jettisoned. However, based on incorrect data of trajectory commands, it failed to go into the planned heliocentric orbit. Instead, it was placed into an elliptical Earth-orbit of 101,350 by 535,522 miles, with a period of 42 days. Charles Conrad and Alan Bean entered the LM to check for possible impacts from the lightning strike. They found none and re-entered the CSM for 10 hours of sleep.

On Nov. 15, the second telecast occurred en route to the moon, showing the interior of the Yankee Clipper. Only one midcourse maneuver was needed. It changed Apollo 12's trajectory to prepare for later insertion into a non-free-return lunar orbit - the first "hybrid" trajectory in Apollo flights. The spacecraft slowed so that it would arrive with the most desirable solar illumination on the selected Site 7.

Prior to lunar orbit insertion, a third telecast was made to Earth on Nov. 17, showing the Earth, moon, spacecraft interior and intravehicular transfer of the crew. Later that day, when Apollo 12 went behind the moon at about 97 miles up, the first lunar orbit insertion burn began. The burn lasted for about six minutes, placing the spacecraft into an elliptical orbit of 69 by 195 miles.

On Nov. 18, two orbits later and again on the far side of the moon, a second lunar orbit insertion burn altered Apollo 12 to an orbit of 62 by 76 miles. It was calculated to eventually circularize for the orbit of the solo CSM due to lunar-gravity potential. This would facilitate subsequent rendezvous and docking of Intrepid and the Yankee Clipper in their moon-parking orbit after the scheduled lunar landing. The same day, Conrad and Bean entered the LM and a telecast to Earth was made of the separation of the CSM and LM occurring 107 hours, 54 minutes into the flight.

On Nov. 19, with the LM behind the moon in the 14th orbit, and some 109 hours, 23 minutes into the mission, the descent orbit insertion maneuver began. The LM decent engine, or LMDE, fired for 29 seconds, lowering Intrepid's orbit to about 9 by 69 miles. After the LM emerged from behind the moon and telemetry contact was re-established with Earth, a discrepancy was noted between orbit data readings from Intrepid and those displayed in Apollo Mission Control in Houston. The LM was initially believed to be in an incorrect descent orbit trajectory for landing in the desired region, due to normal mission anomalies. Using a newly developed "Lear" powered-flight data processor in Houston, the actual trajectory data, as well as correction maneuver information, were fed by voice to the LM crew. This enabled them to update the automatic downrange navigation computer program, shortening the range by 4,190 feet and permitting the precision touchdown at the intended site. This update to a satisfactory trajectory occurred about two minutes after the LM began its powered descent, which had been initiated at about 110 hours, 20 minutes into the mission and lasted a mere nominal 40 seconds longer than the preflight plan had scheduled. With Conrad controlling the descent semi-manually for the last 500 feet, a precision landing occurred at about 110 hours, 32 minutes into the mission, and closer to the target than expected. Intrepid landed in the Ocean of Storms at 3 degrees, 11 hours, 51 minutes south, and 23 degrees, 23 minutes, and 7.5 seconds west. Landing was about 120 feet northeast of Head Crater, and about 535 feet northwest from where Surveyor III stood in its crater. Apollo 12 touched down approximately 950 miles west of where Apollo 11 had landed.

Three hours after the landing and before the first extravehicular activity or, EVA, began. Richard Gordon, orbiting 69 miles up in the Yankee Clipper, was able to see both the Intrepid and Surveyor through the use of a 28-power sextant telescope. Conrad opened Intrepid's hatch at 115 hours, 10 minutes into the mission to begin the first lunar EVA for the Apollo 12 crew. In their first lunar exploration, Conrad spent three hours, 39 minutes outside Intrepid, and Bean logged two hours, 58 minutes on the lurain. During this EVA, Conrad collected lunar surface samples and deployed both the S-band communication antenna and the solar wind experiment. Bean was assigned to mount the TV camera on a tripod. In the process of doing so, it was inadvertently pointed into the sun and ceased to function. The ALSEP instrumentation and SNAP-27 RTG were deployed within an arc of 600 to 700 feet of the LM. The ALSEP functioned satisfactorily, except for two items in the package, and was expected to yield data for up to two years. Deployment of the ALSEP took about an hour to complete. Throughout this first EVA, Conrad and Bean also took photographs of the experiment equipment, the spacecraft, the lurain and of themselves. Before entering the Intrepid, Bean took a 16-inch-deep core sample of the lunar surface and was followed back into the LM by Conrad. The first EVA ended at 119 hours, five minutes into the mission. The crew then ate, recharged their backpacks, prepared for the second EVA the following day, and slept for about five hours.

On Nov. 20, an hour and a half earlier than planned, the crew began the second EVA. Conrad left the Intrepid some 131 hours, 28 minutes into the mission. The second EVA included the collection of 70 pounds of rock and dirt samples, the retrieval of 10 to 15 pounds of randomly selected selenological samples, and further probing of two areas to retrieve lunar material from depths up to 32 inches below the surface. The crew retrieved the TV camera and stored it in the LM for return to Earth. The most important part of this second EVA was a 5,200-foot traverse of the lurain, ranging up to 1,300 feet from Intrepid. Walking northwest to the site of the ALSEP deployment, Conrad and Bean then turned south to perform a selenological rock survey. They skirted the rim of Head Crater, walked further south past Bench Crater, west around Sharp Crater, and back east past Bench Crater again, south of Halo Crater. Eventually they turned northeast, entering the 650-foot-wide Surveyor Crater to retrieve parts of Surveyor III, which was perched some 150 feet from the edge at the southern quadrant.

During the exploration, the astronauts discussed their findings by voice communication with geologists in Houston, who provided advice about which samples to retrieve. Surveyor was extensively photographed before parts were retrieved. The 17-pound TV camera was severed from its mount so that extensive studies could be performed on Earth of its gears, motors, optics, metals and lubricants. This would help determine the long-term effects of exposure to the elements. Similarly, the Surveyor's motorized scoop, and pieces of TV cable, aluminum tubing and glass were gathered. Scientists on Earth were particularly interested in the cable because biological organisms had been trapped within it, and they wanted to know if any had survived.

Conrad and Bean then walked north, up a slope of about 14 degrees into Block Crater located on the rim of Surveyor Crater. They then turned west back to Intrepid, gathering surface samples as they went. They returned to the spacecraft at 134 hours, 49 minutes into the mission. Bean re-entered the LM at about 135 hours, 10 minutes, and Conrad followed at 135 hours, 22 minutes. The second EVA lasted three hours, 48 minutes. The crew removed their pressurized suits and jettisoned them on the moon before eating a meal.

Approximately six hours later on the same day, after a total of 31.6 hours on the moon, the LM ascent stage fired for about seven minutes, putting Intrepid into an initial orbit of 10 by 54 miles for rendezvous and docking with the Yankee Clipper. About three and a half hours later, the rendezvous and docking maneuvers were televised to Earth by Gordon.

Following transfer to the CSM, the ascent stage jettisoned and deorbited to impact the moon. This provided predictable impact data for the ALSEP seismometer. Although planned to impact about six miles from the ALSEP, it landed about 40 miles away. The combined length and severity of the seismic disturbance set up by the impact, estimated to equal that of one ton of TNT. To the surprise of seismologists, strong signals lasted for more than a half hour, and weaker signals ceased about an hour later. The effects were studied, as was the data received from other experiments left on the moon.

A heavy schedule of photographing future landing sites on the lunar surface occurred from the CSM, preceded by a change of plane maneuver 3.8 degrees to the north, on the 39th lunar revolution. The maneuver was performed by a 19-second burn of the service propulsion system, or SPS. Earlier, while the Yankee Clipper was in its 27th and 28th revolutions, Gordon conducted the multi-spectral photographic survey of the lunar surface. During the 45th revolution and the 89th hour of the mission, the SPS ignited to put Apollo 12 into a trans-Earth trajectory. The trajectory occurred 172 hours, 27 minutes into the mission Nov. 21.

The return flight was uneventful. A midcourse correction maneuver occurred Nov. 22, when Apollo 12 was about 208,000 miles from Earth. On Nov. 23, when the spacecraft was 108,000 miles from Earth, the crew held a televised news conference, followed by sleep. A second scheduled midcourse correction maneuver was not needed. On Nov. 24, following the same nominal re-entry procedure scheduled for Apollo 11, Apollo 12 ended its 10-day flight by splashing down in the Pacific Ocean at 15 degrees, 46.6 minutes south latitude, and 165 degrees, 9 minutes west. Splashdown occurred about three miles from the target area, and three miles south of and within sight of the recovery ship USS Hornet. The splashdown occurred about 400 miles southeast of American Samoa, after a flight of 244 hours, 36 minutes, 25 seconds - just 62 seconds longer than planned.

8
General Discussion / Apollo 10 checklist
« on: September 17, 2017, 03:33:32 AM »
Apollo 10


Emblem of the Apollo 10 lunar orbit mission. The prime crew of Apollo 10 is astronauts Thomas P. Stafford, commander; John W. Young, command module pilot; and Eugene A. Cernan, lunar module pilot.
Credits: NASA


Mission Objective
The Apollo 10 mission encompassed all aspects of an actual crewed lunar landing, except the landing. It was the first flight of a complete, crewed Apollo spacecraft to operate around the moon


Objectives included a scheduled eight-hour lunar orbit of the separated lunar module, or LM, and descent to about nine miles off the moon's surface before ascending for rendezvous and docking with the command and service module, or CSM, in about a 70-mile circular lunar orbit. Pertinent data to be gathered in this landing rehearsal dealt with the lunar potential, or gravitational effect, to refine the Earth-based crewed spaceflight network tracking techniques, and to check out LM programmed trajectories and radar, and lunar flight control systems.
Twelve television transmissions to Earth were planned. All mission objectives were achieved.
Mission Highlights
Apollo 10 launched from Cape Kennedy on May 18, 1969, into a nominal 115-mile circular Earth-parking orbit at an inclination of 32.5 degrees. One-and-a-half orbits later, translunar injection occurred. The S-IVB fired to increase velocity from 25,593 to 36,651 feet per second on a free-return trajectory. Twenty-five minutes later, the CSM separated for transposition and docking with the LM, similar to the maneuver performed on Apollo 9. The orbital vehicle was comprised of the S-IVB stage, and its payload of the CSM, the LM and spacecraft-lunar module adapter, or SLA, shroud. The Apollo 10 crew members were Commander Thomas Stafford, Command Module Pilot John Young and Lunar Module Pilot Eugene Cernan.

The first live color TV transmissions to Earth began three hours after launch when Apollo 10 was 3,570 miles from Earth and concluded when the spacecraft was 9,428 miles away. The transmission showed the docking process and the interior of the CSM. About four hours after launch, Apollo 10 separated from the S-IVB sage, which was followed by another telecast from 14,625 miles out. A third TV transmission of pictures of Earth was made from 24,183 miles out, and a fourth telecast of the Earth was made from 140,000 miles.

The launch trajectory had been so satisfactory that only one of four midcourse corrections was needed. This was accomplished 26.5 hours into the flight. About 76 hours into the mission, lunar-orbit insertion occurred with the firing of the service propulsion system, or SPS. A second firing of the engine 4.5 hours later circularized the lunar orbit of Apollo 10 at approximately 69 miles, which was followed by the first color TV pictures to Earth of the moon's surface.

Stafford and Cernan entered the LM and prepared for the undocking maneuver that occurred on the 12th revolution, a little more than 98 hours into the flight. At about 100 hours, on May 22, the vehicles separated and briefly flew a station-keeping lunar orbit of 66.7 by 71.5 miles. To achieve a simulation of the future Apollo 11 landing, the LM descent engine fired for 27.4 seconds, with 10 percent thrust for the first 15 seconds and 40 percent thrust for the rest. This brought the LM to a new orbit of 9.7 by 70.5 miles.

The LM flew over Landing Site 2 in the Sea of Tranquility. During this run, the LM landing radar was tested for altitude functioning, providing both "high gate" and "low gate" data. Following a 7.5-second firing of the LM reaction control system, or RCS, thrusters, the descent engine fired in two bursts for 40.1 seconds - at 10 percent and at full throttle - placing the LM into an orbit of 13.7 by 219 miles. On the 14th revolution, it reached a pericynthion of 12.7 miles and was "staged." The descent stage jettisoned on a second attempt and an uncontrollable gyration of the ascent stage occurred. It was later attributed to an error in a flight-plan checklist, causing an incorrect switch position.

The ascent engine fired for 15 seconds, lowering the LM apocythion to 53.8 miles, 230 miles behind and below the CSM. The RCS thrusters fired for 27.3 seconds when the LM was 16.9 miles below the CSM and 170.4 miles behind, yielding an orbit of 54.5 by 48.1 miles. To prepare for the terminal phase of rendezvous, the RCS fired again, resulting in an orbit of 17.2 by 81.7 miles.

Stafford sighted the CSM's running lights at about 48 miles. The 15-second terminal phase initiation firing reduced velocity as the LM entered an intercept trajectory and the two vehicles achieved station-keeping of the 16th lunar revolution. With Young in the CSM taking on an active rendezvous role, the vehicles were re-docked on May 23, slightly more than 106 hours into the mission. The LM ascent stage jettisoned and its engine fired to depletion.

The rest of the time in lunar orbit was spent on landmark tracking and photography. On the 31st orbit, the SPS restarted. Apollo 10 was on the back side of the moon when it was injected into a trans-Earth trajectory.

After a midcourse correction, and command and service module separation, Apollo 10 re-entered Earth's atmosphere May 26. The module splashed down 165 degrees west, and 5 degrees, 8 minutes south in the Pacific Ocean. It's landing was within television range of its primary recovery ship, the USS Princeton. Apollo 10 completed a flight of 192 hours, three minutes, 23 seconds - one minute, 24 seconds longer than planned. The Apollo 10 S-IVB third stage and LM ascent stage went into solar orbits. The LM descent stage went into a selenocentric orbit.

Crew
Thomas Stafford, Commander
Eugene Cernan, Lunar Module Pilot
John Young, Command Module Pilot

Backup Crew
L. Gordon Cooper Jr., Commander
Edgar D. Mitchell, Lunar Module Pilot
Donn F. Eisele, Command Module Pilot

Payload
Charlie Brown (SM-106)
Snoopy (LM-4)

Prelaunch Milestones
12/10/68 - S-II stage ondock at Kennedy
11/27/68 - S-IC stage ondock at Kennedy
12/3/68 - S-IVB ondock at Kennedy
12/15/68 - S-IU ondock at Kennedy

Launch
May 18, 1969; 12:49 p.m. EDT
Launch Pad 39B
Saturn-V AS-505
High Bay 2
Mobile Launcher Platform-3
Firing Room 3

Orbit
Altitude: 118.83 miles
Inclination: 32.546 degrees
Orbits: 31 revolutions
Duration: eight days, 23 minutes, 23 seconds
Distance: 829,437.5 miles

Landing
May 26, 1969; 12:52:23 p.m. EDT
Pacific Ocean
Recovery Ship: USS Princeton

9
General Discussion / Apollo 9 checklist
« on: September 17, 2017, 03:22:01 AM »
Apollo 9

July 8, 2009

"Spider's First Mission..."
Crew
James A. McDivitt
Commander

Russell L. Schweickart
Lunar Module Pilot

David R. Scott
Command Module Pilot
Backup Crew
Charles Conrad Jr.
Commander

Alan L. Bean
Lunar Module Pilot

Richard F. Gordon Jr.
Command Module Pilot
Payload
Gumdrop (CSM-104)
Spider (LM-3)
Prelaunch Milestones
5/15/68 - S-II stage ondock at Kennedy
9/30/68 - S-IC stage ondock at Kennedy
9/12/68 - S-IVB ondock at Kennedy
9/30/68 - S-IU ondock at Kennedy
1/3/69 - rollout to pad
2/19/69 - Countdown Demonstration Test
Launch
March 3, 1969; 11:00 a.m. EST
Launch Pad 39A
Saturn-V AS-504
High Bay 3
Mobile Launcher Platform-2
Firing Room 2
Orbit
Altitude: 118.63 miles
Inclination: 32.552 degrees
Orbits: 151 revolutions
Duration: 10 days, one hour, 54 seconds
Distance: 4,214,543 miles
Landing
March 13, 1969; 12:01 p.m. EST
Atlantic Ocean
Recovery Ship: USS Guadalcana


Mission Objective
The primary objective of Apollo 9 was an Earth-orbital engineering test of the first crewed lunar module, or LM. Concurrent prime objectives included an overall checkout of launch vehicle and spacecraft systems, the crew, and procedures. This was done by performing an integrated series of flight tasks with the command module, or CM, the service module, or SM, the joined command and service module, or CSM, the LM and S-IVB stage while they were linked in launch or various docked configurations, and while they were flying separate orbital patterns. The LM was to be tested as a self-sufficient spacecraft, and was also to perform active rendezvous and docking maneuvers paralleling those scheduled for the following Apollo 10 lunar-orbit mission.

The flight plan's top priority was the CSM and LM rendezvous and docking. This was performed twice - once while the LM was still attached to the S-IVB, and again when the LM was active. Further goals included internal crew transfer from the docked CSM to the LM; special tests of the LM's support systems; crew procedures; and tests of flight equipment and the extravehicular activity, or EVA, mobility unit. The crew also configured the LM to support a two-hour EVA, and simulated an LM crew rescue, which was the only planned EVA from the LM before an actual lunar landing.

The LM descent and ascent engines fired on orbital change patterns to simulate a lunar-orbit rendezvous and backup abort procedures. The CSM service propulsion system, or SPS, fired five times, including a simulation of an active rendezvous to rescue an LM that had become inactivate.

After separation of the CSM from the SLA in Earth orbit and jettison of the SLA's LM protective panels, the CSM was to transpose position and dock with the exposed LM. The docked modules were to separate and the spacecraft was to adjust its orbit 2,000 feet away from the S-IVB stage. The S-IVB engine was then to restart twice, placing the stage in an Earth-escape trajectory and into solar orbit. This would simulate a translunar injection of the stage for Apollo 10 and subsequent lunar missions. Other objectives included the multi-spectral photographic experiment for subsequent crewed spacecraft.

All prime mission objectives were met. All major spacecraft systems were successfully demonstrated. The few off-nominal conditions that developed did not affect achievement of the major goals.







Mission Highlights
Apollo 9 launched from Cape Kennedy on March 3, 1969, into a nominal 117 by 119-mile Earth orbit with Commander James McDivitt, Command Module Pilot David Scott and Lunar Module Pilot Russell Schweickart aboard.

On the first day, and after orbit injection of the combined S-IVB stage and its SLA-LM-CSM payload, venting of the S-IVB propellant tanks changed the orbit to 123 by 127 miles. The CSM separated and the SLA panel walls jettisoned, transposing the CSM to 180 degrees toward the LM atop the S-IVB. The CSM docked with the LM in the second orbit. The linked modules ejected from the S-IVB, and the thrust placed the CSM-LM a safe distance away for a 62-second restart of the S-IVB, which raised the apogee to 1,895 miles. To achieve a hyperbolic orbit for the planned escape trajectory, the S-IVB restarted a second time for four minutes, two seconds. It resulted in a less than desired maximum velocity increase and was off nominal by about 11 percent. While this did not affect the Apollo 9 flight, a lunar mission might have been aborted. Before the third S-IVB burn, the CSM SPS fired for five seconds, placing the CSM in an orbit of 125 by 145 miles. The firing improved orbital lifetime, checked the capability of the guidance and navigation system to control the burn, and performed a hard check of the LM's ability to withstand thrust acceleration and vibration.

The second SPS firing for one minute, five seconds occurred on March 4. It changed Apollo 9's orbit to 123 by 213 miles and tested the structural dynamics of the docked CSM-LM under loads about those of a lunar mission. A third SPS firing the same day for four minutes, 42 seconds, changed the orbit to 126 by 313 miles. The fourth burn, which lasted for 28.2 seconds, was an out-of-plane change.

On Flight Day 3, McDivitt and Schweickart put on spacesuits and transferred to the LM through the tunnel connection to perform a systems checkout. This included a 367-second firing of the LM descent engine to simulate the throttle pattern to be used during a lunar landing mission. McDivitt controlled the final 59 seconds, varying the thrust from 10 to 40 percent and shutting it off manually. This was the first crewed throttling of an engine in space and increased the spacecraft's orbit to 130 by 300 miles. After nine hours, McDivitt and Schweickart transferred back to the CSM with Scott. Then, the SPS fired for the fifth time as the final shaping maneuver prior to the rendezvous exercises to be performed two days later. The firing placed Apollo 9 into an orbit of 142 by 149 miles.

On Flight Day 4, McDivitt and Schweickart re-entered the LM. Because of nausea, Schweickart's scheduled two-hour EVA to simulate external transfer rescue techniques was canceled. Instead, he climbed out of the LM porch for a 37.5 minute EVA, testing the EVA mobility unit, including the portable life support system backpack.

On Flight Day 5, with McDivitt and Schweickart again aboard the LM, it separated from Scott's CSM. The LM descent engine fired once for 24.9 seconds to place the spacecraft into a 137 by 167 mile orbit. If fired again for 24.4 seconds to circularize the orbit about 154 by 160 miles, some 12 miles higher than the CMS. Four hours later, horizontally 113 miles away from the CSM, the LM descent stage jettisoned for a first-time firing in space of the ascent stage engine. It lowered the LM orbit by 11 miles and placed it 75 miles behind and 10 miles below the CSM, leaving it able to commence a rendezvous. Six hours later, the CSM and LM redocked. The LM ascent stage jettisoned and was commanded to fire its engine to fuel depletion.

Although postponed by one revolution on Flight Day 6, a sixth firing of the CSM SPS lowered the orbit to 121 by 138 miles. On the seventh day, the crew performed Earth landmark tracking over the U.S. and the South Atlantic. On the eighth day, a seventh burn of the SPS altered the orbit of Apollo 9 to 113 by 288 miles. No major mission activities were scheduled for the ninth day.

Two telecasts were made to Earth from Apollo 9. The first, on March 5, lasted for almost seven minutes. The second telecast on the following day lasted about 13 minutes, and only showed interior views of the LM. Photographs taken as part of the multi-spectral terrain photographic experiment were successful.

On March 13, the tenth day, re-entry was extended by one revolution because of heavy seas in the primary recovery area. Six hundred miles into its 152nd revolution, Apollo 9 splashed down at 23.25 degrees north, 68 degrees west. The crew was within three miles and in full view of their recovery ship, about 341 miles north of Puerto Rico. The flight totaled 241 hours, 53 seconds - 10 seconds longer than planned. The S-IVB stage reached heliocentric orbit and the LM ascent stage reached Earth orbit. The LM descent stage decayed March 22.


10
General Discussion / Apollo 8 -- checklist
« on: September 15, 2017, 08:29:59 PM »
"'Round the moon and back..."
Crew
Frank Borman
Commander

William A. Anders
Lunar Module Pilot

James A. Lovell Jr.
Command Module Pilot
Backup Crew
Neil Armstrong
Commander

Fred W. Haise Jr.
Lunar Module Pilot

Edwin E. Aldrin Jr.
Command Module Pilot
Payload
CSM-103
Prelaunch Milestones
12/24/67 - S-II stage ondock at Kennedy
12/27/67 - S-IC stage ondock at Kennedy
12/30/67 - S-IVB ondock at Kennedy
1/4/68 - S-IU ondock at Kennedy
8/14/68 - launch vehicle at pad
10/17/68 - spacecraft at Pad
12/11/68 - Countdown Demonstration Test
Launch
Dec. 21, 1968; 7:51 a.m. EST
Launch Pad 39A
Saturn-V AS-503
High Bay 1
Mobile Launcher Platform-1
Firing Room 1
Orbit
Altitude: 118.82 miles
Inclination: 32.509 degrees
Orbits: 10 revolutions
Duration: six days, three hours, 42 seconds
Distance: 579,606.9 miles
Landing
Dec. 27, 1968; 10:52 a.m. EST
Pacific Ocean
Recovery Ship: USS Yorktown


Mission Objective
The mission objectives for Apollo 8 included a coordinated performance of the crew, the command and service module, or CSM, and the support facilities. The mission also was to demonstrate translunar injection; CSM navigation, communications and midcourse corrections; consumable assessment; and passive thermal control. The detailed test objectives were to refine the systems and procedures relating to future lunar operations.

All primary mission objectives and detailed test objectives were achieved. All launch vehicle and spacecraft systems performed according to plan. Engineering accomplishments included use of the ground network with onboard navigational techniques to sharpen the accuracy of lunar orbit determination and the successful use of Apollo high-gain antenna - a four-dish unified S-band antenna that deployed from the service module, or SM, after separation from the third stage.







Mission Highlights
Apollo 8 launched from Cape Kennedy on Dec. 21, 1968, placing astronauts Frank Borman, James Lovell Jr. and William Anders into a 114 by 118 mile parking orbit at 32.6 degrees.

During the second revolution, at two hours, 50 minutes ground elapsed time, the S-IVB third stage restarted for a five-minute, 17-second burn, initiating translunar coast. Following S-IVB/CSM separation at three hours, 21 minutes, a 1.5 feet per second radial burn of the SM reaction control engines was initiated to establish sufficient distance for S-IVB propellant dumping. Following the propellant dumping, which sent the stage into diverging trajectory and solar orbit, the separation distance still was deemed inadequate and a second SM reaction control burn of 7.7 feet per second was performed.

The first midcourse correction occured at about 10 hours, 55 minutes into the mission and provided a first check on the service propulsion system, or SPS, engine prior to committing spacecraft to lunar orbit insertion. The second and final midcourse correction prior to lunar orbit insertion occurred at 61 hours, 8 minutes, 54 seconds.

Loss of signal occurred at 68 hours, 58 minutes, 45 seconds when Apollo 8 passed behind the moon. At that moment, NASA's three astronauts became the first humans to see the moon's far side. The first lunar orbit insertion burn, at 69 hours, 8 minutes, 52 seconds, lasted four minutes, two seconds and reduced the spacecraft's 8,400 feet per second velocity by 2,994 feet per second, resulting in an initial lunar orbit of 70 by 193 miles. The orbit circularized at 70 miles by the second lunar orbit insertion burn of 135 feet per second, performed at the start of the third revolution, again on the back side of the moon, at 73 hours, 35 minutes, five seconds.

During the 20-hour period in lunar orbit, the crew conducted a full, sleepless schedule of tasks including landmark and landing site tracking, vertical stereo photography, stereo navigation photography and sextant navigation. At the end of the 10th lunar orbit, at 89 hours, 19 minutes, and 16 seconds, a three-minute, 23-second trans-Earth injection burn was conducted, adding 3,522 feet per second. Only one midcourse correction, a burn of five feet per second conducted at 104 hours, was required instead of the three scheduled.

Six telecasts were conducted during the mission: two during translunar coast, two during lunar orbit and two during trans-Earth coast. These transmissions were telecast worldwide and in real time to all five continents. During a telecast on Christmas Eve, the crew read verses from the first chapter of Genesis and wished viewers, "Good night, good luck, a Merry Christmas and God bless all of you - all of you on the good Earth." All telecasts were of excellent quality. Voice communications also were exceptionally good throughout the mission.

Separation of the command module, or CM, from the SM occurred at 146 hours, 31 minutes. A double-skip maneuver conducted during the re-entry steering phase resulted in an altitude gain of 25,000 to 30,000 feet. The re-entry velocity was 24,696 mph, with heatshield temperatures reaching 5,000 degrees F. Parachute deployment and other re-entry events were nominal. Apollo 8 splashed down in the Pacific Ocean at 10:51 a.m. EST Dec. 27. The splashdown was about 5,100 yards from the recovery ship USS Yorktown, 147 hours after launch and precisely on time. According to prior planning, helicopters and aircraft hovered over the spacecraft, and pararescue personnel were not deployed until local sunrise, 50 minutes after splashdown. The Apollo 8 crew reached the recovery ship at 12:20 p.m. EST.


11
General Discussion / Apollo 7 -- check list
« on: September 15, 2017, 08:24:26 PM »

Apollo 7 mission patch

"The Walt, Wally and Donn Show..."

Crew
Walter Schirra Jr.
Commander

R. Walter Cunningham
Lunar Module Pilot

Donn F. Eisele
Command Module Pilot

Backup Crew
Thomas Stafford
Commander

Eugene Cernan
Lunar Module Pilot

John Young
Command Module Pilot

Payload
CSM-101

Prelaunch Milestones
3/28/68 - S-I



ondock at Kennedy
3/28/68 - S-IB ondock at Kennedy
4/7/68 - S-IVB ondock at Kennedy
4/11/68 - S-IU ondock at Kennedy
5/11/68 - launch vehicle at pad
8/9/68 - spacecraft at pad
9/17/68 - Countdown Demonstration Test

Launch
Oct. 11, 1968; 11:02:45 a.m. EST
Launch Complex 34
Saturn-IB AS-205
First Block II CSM
First crewed CSM mission
First three-person American crew
First live TV downlink

Orbit
Altitude: 141.65 miles
Inclination: 31.608 degrees
Orbits: 163 revolutions
Duration: 10 days, 20 hours, nine minutes, three seconds
Distance: 4,546,918.3 miles

Landing
Oct. 22, 1968; 7:11:48 a.m. EDT
Atlantic Ocean
Recovery Ship: USS Essex


Mission Objective
The primary objectives for the Apollo 7 engineering test flight were simple: Demonstrate command and service module, or CSM, and crew performance; demonstrate crew, space vehicle and mission support facilities performance during a crewed CSM mission; and demonstrate CSM rendezvous capability.



Mission Highlights
Oct. 11, 1968, was a hot day Cape Kennedy, but the heat was tempered by a pleasant breeze when Apollo 7 lifted off in a two-tongued blaze of orange-colored flames. The Saturn IB, in its first trial with men aboard, provided a perfect launch, and its first stage dropped off two minutes, 25 seconds later. The S-IVB second stage took over, giving astronauts their first ride atop a load of liquid hydrogen. At five minutes, 54 seconds into the mission, Walter Schirra Jr., the commander, reported, "She is riding like a dream." About five minutes later, an elliptical orbit was achieved 140 by 183 miles above Earth.

Once Apollo 7 cleared the pad, a three-shift mission control team -- led by flight directors Glynn Lunney, Eugene Kranz and Gerald D. Griffin -- in Houston took over. Schirra, Donn Eisele and R. Walter Cunningham inside the command module had heard the sound of propellants rushing into the firing chambers, noticed the vehicle swaying slightly and felt the vibrations at ignition. Ten and a half minutes after launch, with little bumpiness and low g loads during acceleration, Apollo 7 reached the first stage of its journey, an orbital path 227 by 285 kilometers above Earth.

The S-IVB stayed with the CSM for about 1 1/2 orbits, then separated. Schirra fired the CSM's small rockets to pull 50 feet ahead of the S-IVB, then turned the spacecraft around to simulate docking, as would be necessary to extract an LM for a moon landing. The next day, when the CSM and the S-IVB were about 80 miles apart, Schirra and his crewmates sought out the lifeless, tumbling 59-foot craft in a rendezvous simulation and approached within 70 feet.

Cunningham reported the spacecraft lunar module adapter panels had not fully deployed, which naturally reminded Thomas Stafford, the mission's capsule communicator, or capcom, of the "angry alligator" target vehicle he had encountered on his Gemini IX mission. This mishap would have been embarrassing on a mission that carried a lunar module, but the panels would be jettisoned explosively on future flights.

After this problem, service module engine performance was a joy. This was one area where the crew could not switch to a redundant or backup system. At crucial times during a lunar voyage, the engine simply had to work or they would not get back home. On Apollo 7, there were eight nearly perfect firings out of eight attempts. On the first, the crew had a real surprise. In contrast to the smooth liftoff of the Saturn, the blast from the service module engine jolted the astronauts, causing Schirra to yell "Yabadabadoo" like Fred Flintstone in the contemporary video cartoon. Later, Eisele said, "We didn't quite know what to expect, but we got more than we expected." He added more graphically it was a real boot in the rear that just plastered them into their seats. But the engine did what it was supposed to do each time it fired.

The Apollo vehicle and the CSM performed superbly. Durability was shown for 10.8 days -- longer than a journey to the moon and back. With few exceptions, the other systems in the spacecraft operated as they should. Occasionally, one of the three fuel cells supplying electricity to the craft developed some unwanted high temperatures, but load-sharing hookups among the cells prevented any power shortage. The crew complained about noisy fans in the environmental circuits and turned one of them off. That did not help much, so the men switched off the other. The cabin stayed comfortable, although the coolant lines sweated and water collected in little puddles on the deck, which the crew expected after Joseph Kerwin's team test in the altitude chamber. Schirra's crew vacuumed the excess water out into space with the urine dump hose.

A momentary shudder went through the Mission Control Center in Houston when both AC buses dropped out of the spacecraft's electrical system, coincident with automatic cycles of the cryogenic oxygen tank fans and heaters. Manual resetting of the AC bus breakers restored normal service.

Three of the five spacecraft windows fogged because of improperly cured sealant compound, a condition that could not be fixed until Apollo 9. Visibility from the spacecraft windows ranged from poor to good during the mission. Shortly after the launch escape tower jettisoned, two of the windows had soot deposits and two others had water condensation. Two days later, however, Cunningham reported that most of the windows were in fairly good shape, although moisture was collecting between the inner panes of one window. On the seventh day, Schirra described essentially the same conditions.

Even with these impediments, the windows were adequate. Those used for observations during rendezvous and station-keeping with the S-IVB remained almost clear. Navigational sighting with a telescope and a sextant on any of the 37 preselected Apollo stars was difficult if done too soon after a waste-water dump. Sometimes they had to wait several minutes for the frozen particles to disperse. Eisele reported that unless he could see at least 40 or 50 stars at a time he found it hard to decide what part of the sky he was looking toward. On the whole, however, the windows were satisfactory for general and landmark observations and for out-the-window photography.

Despite minor irritations, such as smudging windows and puddling water, most components supported the operations and well-being of the spacecraft and crew as planned. For example, the waste management system for collecting solid body wastes was adequate, though annoying. The defecation bags containing a germicide to prevent bacteria and gas formation were easily sealed and stored in empty food containers in the equipment bay. But the bags certainly were not convenient and there were usually unpleasant odors. Each time they were used, it took crew members 45 to 60 minutes, causing them to wait for a time when there was no work to do and postponing it as long as possible. The crew had a total of only 12 defecations during a period of nearly 11 days. Urination was much easier, as the crew did not have to remove clothing. There was a collection service for both the pressure suits and the in-flight coveralls. Both devices could be attached to the urine dump hose and emptied into space. They had half expected the hose valve to freeze up in vacuum, but it never did.

Chargers for the batteries needed for re-entry after fuel cells departed with the service module, or SM, returned 50-75 percent less energy than expected. Most serious was the overheating of fuel cells, which might have failed when the spacecraft was too far from Earth to return on batteries, even if fully charged. But each of these anomalies was satisfactorily checked out before Apollo 8 flew.

Some of the crew's grumpiness during the mission could be attributed to physical discomfort. About 15 hours into the flight, Schirra developed a bad cold, and Cunningham and Eisele soon followed suit. A cold is uncomfortable enough on the ground, but in weightlessness it presents a different problem. Mucus accumulates, fills the nasal passages and does not drain from the head. The only relief is to blow hard, which is painful to the ear drums. So the crew of Apollo 7 whirled through space suffering from stopped-up ears and noses. They took aspirin and decongestant tablets, and discussed their symptoms with doctors.

Several days before the mission ended, they began to worry about wearing their suit helmets during re-entry, which would prevent them from blowing their noses. The buildup of pressure might burst their eardrums. Deke Slayton in mission control tried to persuade them to wear the helmets anyway, but Schirra was adamant. They each took a decongestant pill about an hour before re-entry and made it through the acceleration zone without any problems with their ears.

The CSM's service propulsion system, which had to fire the CSM into and out of the moon's orbit, worked perfectly during eight burns lasting from half a second to 67.6 seconds. Apollo's flotation bags had their first try out when the spacecraft, considered a "lousy boat," splashed down in the Atlantic southeast of Bermuda, less than 2 kilometers from the planned impact point. Landing location was 27 degrees, 32 minutes north, and 64 degrees, four minutes west. The module turned upside down, but when inflated, the brightly colored bags flipped it upright. The tired, but happy, voyagers were picked up by helicopter and deposited on the deck of the USS Essex by 8:20 a.m. EDT. Spacecraft was aboard the ship at 9:03 a.m. EDT.

Apollo 7 accomplished what it set out to do -- qualifying the command and service module, and clearing the way for the proposed lunar orbit mission to follow. Its activities were of national interest. A special edition of NASA's news clipping collection called "Current News" included front page stories from 32 major newspapers scattered over the length and breadth of the nation. Although the post-mission celebrations may not have rivaled those for the first orbital flight of an American, John Glenn in 1962, enthusiasm was high and this fervor would build to even greater heights each time the lunar landing goal drew one step closer.

In retrospect it seems inconceivable, but serious debate ensued in NASA councils on whether television should be broadcast from Apollo missions, and the decision to carry the little 4 1/2-pound camera was not made until just before this October flight. Although these early pictures were crude, it was informative for the public to see astronauts floating weightlessly in their roomy spacecraft, snatching floating objects and eating the first hot food consumed in space. Like the television pictures, the food improved on later missions.

Apollo 7's achievement led to a rapid review of Apollo 8's options. The Apollo 7 astronauts went through six days of debriefing for the benefit of Apollo 8, and on Oct. 28, 1968, the Manned Space Flight Management Council chaired by George Mueller met at the Manned Spacecraft Center, investigating every phase of the forthcoming mission. The next day brought a lengthy systems review of Apollo 8's Spacecraft 103. Dr. Thomas O. Paine, NASA administrator, made the go/no-go review of lunar orbit on Nov. 11, 1968, at NASA Headquarters in Washington, D.C. By this time, nearly all the skeptics had become converts.

12
General Discussion / Apollo 1
« on: September 15, 2017, 08:12:53 PM »
Apollo 1


Apollo 1 insignia.
Credits: NASA

Apollo 1 Tragedy
Jan. 27, 1967, tragedy struck on the launch pad at Cape Kennedy during a preflight test for Apollo 204 (AS-204). The mission was to be the first crewed flight of Apollo, and was scheduled to launch Feb. 21, 1967. Astronauts Virgil Grissom, Edward White and Roger Chaffee lost their lives when a fire swept through the command module, or CM.

The exhaustive investigation of the fire and extensive reworking of the Apollo command modules postponed crewed launches until NASA officials cleared them for flight. Saturn IB schedules were suspended for nearly a year, and the launch vehicle that finally bore the designation AS-204 carried a lunar module, or LM, as the payload, instead of a CM. The missions of AS-201 and AS-202 with Apollo spacecraft aboard had been unofficially known as Apollo 1 and Apollo 2 missions. AS-203 carried only the aerodynamic nose cone.

In the spring of 1967, NASA's Associate Administrator for Manned Space Flight, Dr. George E. Mueller, announced that the mission originally scheduled for Grissom, White and Chaffee would be known as Apollo 1, and said that the first Saturn V launch, scheduled for November 1967, would be known as Apollo 4. The eventual launch of AS-204 became known as the Apollo 5 mission. No missions or flights were ever designated Apollo 2 or 3.
 

The second launch of a Saturn V took place on schedule in the early morning of April 4, 1968. Known as AS-502, or Apollo 6, the flight was a success, though two first-stage engines shut down prematurely, and the third-stage engine failed to reignite after reaching orbit.

Crew
Virgil(Gus) I. Grissom
Edward(Space walker) H. White
Roger B. Chaffee

Backup Crew
Walter M. Schirra Jr.
Donn F. Eisele
Walter Cunningham

Payload
Spacecraft-012

Apollo Pad Fire
Emergency Transmission: Jan. 27, 1967; 6:31:05 p.m. EST
Launch Complex 34
Saturn-IB AS-204
CSM-012

13
General Discussion / apollo 11 checklist of sorts
« on: September 14, 2017, 07:11:34 PM »
Hope this is useful
More to come

The Eagle has landed…"
Mission Objective
The primary objective of Apollo 11 was to complete a national goal set by President John F. Kennedy on May 25, 1961: perform a crewed lunar landing and return to Earth.

Additional flight objectives included scientific exploration by the lunar module, or LM, crew; deployment of a television camera to transmit signals to Earth; and deployment of a solar wind composition experiment, seismic experiment package and a Laser Ranging Retroreflector. During the exploration, the two astronauts were to gather samples of lunar-surface materials for return to Earth. They also were to extensively photograph the lunar terrain, the deployed scientific equipment, the LM spacecraft, and each other, both with still and motion picture cameras. This was to be the last Apollo mission to fly a "free-return" trajectory, which would enable a return to Earth with no engine firing, providing a ready abort of the mission at any time prior to lunar orbit insertion.
Mission Highlights
Apollo 11 launched from Cape Kennedy on July 16, 1969, carrying Commander Neil Armstrong, Command Module Pilot Michael Collins and Lunar Module Pilot Edwin "Buzz" Aldrin into an initial Earth-orbit of 114 by 116 miles. An estimated 530 million people watched Armstrong's televised image and heard his voice describe the event as he took "...one small step for man, one giant leap for mankind" on July 20, 1969.

Two hours, 44 minutes and one-and-a-half revolutions after launch, the S-IVB stage reignited for a second burn of five minutes, 48 seconds, placing Apollo 11 into a translunar orbit. The command and service module, or CSM, Columbia separated from the stage, which included the spacecraft-lunar module adapter, or SLA, containing the lunar module, or LM, Eagle. After transposition and jettisoning of the SLA panels on the S-IVB stage, the CSM docked with the LM. The S-IVB stage separated and injected into heliocentric orbit four hours, 40 minutes into the flight.
The first color TV transmission to Earth from Apollo 11 occurred during the translunar coast of the CSM/LM. Later, on July 17, a three-second burn of the SPS was made to perform the second of four scheduled midcourse corrections programmed for the flight. The launch had been so successful that the other three were not needed.
On July 18, Armstrong and Aldrin put on their spacesuits and climbed through the docking tunnel from Columbia to Eagle to check out the LM, and to make the second TV transmission.
On July 19, after Apollo 11 had flown behind the moon out of contact with Earth, came the first lunar orbit insertion maneuver. At about 75 hours, 50 minutes into the flight, a retrograde firing of the SPS for 357.5 seconds placed the spacecraft into an initial, elliptical-lunar orbit of 69 by 190 miles. Later, a second burn of the SPS for 17 seconds placed the docked vehicles into a lunar orbit of 62 by 70.5 miles, which was calculated to change the orbit of the CSM piloted by Collins. The change happened because of lunar-gravity perturbations to the nominal 69 miles required for subsequent LM rendezvous and docking after completion of the lunar landing. Before this second SPS firing, another TV transmission was made, this time from the surface of the moon.
On July 20, Armstrong and Aldrin entered the LM again, made a final check, and at 100 hours, 12 minutes into the flight, the Eagle undocked and separated from Columbia for visual inspection. At 101 hours, 36 minutes, when the LM was behind the moon on its 13th orbit, the LM descent engine fired for 30 seconds to provide retrograde thrust and commence descent orbit insertion, changing to an orbit of 9 by 67 miles, on a trajectory that was virtually identical to that flown by Apollo 10. At 102 hours, 33 minutes, after Columbia and Eagle had reappeared from behind the moon and when the LM was about 300 miles uprange, powered descent initiation was performed with the descent engine firing for 756.3 seconds. After eight minutes, the LM was at "high gate" about 26,000 feet above the surface and about five miles from the landing site.
The descent engine continued to provide braking thrust until about 102 hours, 45 minutes into the mission. Partially piloted manually by Armstrong, the Eagle landed in the Sea of Tranquility in Site 2 at 0 degrees, 41 minutes, 15 seconds north latitude and 23 degrees, 26 minutes east longitude. This was about four miles downrange from the predicted touchdown point and occurred almost one-and-a-half minutes earlier than scheduled. It included a powered descent that ran a mere nominal 40 seconds longer than preflight planning due to translation maneuvers to avoid a crater during the final phase of landing. Attached to the descent stage was a commemorative plaque signed by President Richard M. Nixon and the three astronauts.
The flight plan called for the first EVA to begin after a four-hour rest period, but it was advanced to begin as soon as possible. Nonetheless, it was almost four hours later that Armstrong emerged from the Eagle and deployed the TV camera for the transmission of the event to Earth. At about 109 hours, 42 minutes after launch, Armstrong stepped onto the moon. About 20 minutes later, Aldrin followed him. The camera was then positioned on a tripod about 30 feet from the LM. Half an hour later, President Nixon spoke by telephone link with the astronauts.
Commemorative medallions bearing the names of the three Apollo 1 astronauts who lost their lives in a launch pad fire, and two cosmonauts who also died in accidents, were left on the moon's surface. A one-and-a-half inch silicon disk, containing micro miniaturized goodwill messages from 73 countries, and the names of congressional and NASA leaders, also stayed behind.
During the EVA, in which they both ranged up to 300 feet from the Eagle, Aldrin deployed the Early Apollo Scientific Experiments Package, or EASEP, experiments, and Armstrong and Aldrin gathered and verbally reported on the lunar surface samples. After Aldrin had spent one hour, 33 minutes on the surface, he re-entered the LM, followed 41 minutes later by Armstrong. The entire EVA phase lasted more than two-and-a-half hours, ending at 111 hours, 39 minutes into the mission.
Armstrong and Aldrin spent 21 hours, 36 minutes on the moon's surface. After a rest period that included seven hours of sleep, the ascent stage engine fired at 124 hours, 22 minutes. It was shut down 435 seconds later when the Eagle reached an initial orbit of 11 by 55 miles above the moon, and when Columbia was on its 25th revolution. As the ascent stage reached apolune at 125 hours, 19 minutes, the reaction control system, or RCS, fired so as to nearly circularize the Eagle orbit at about 56 miles, some 13 miles below and slightly behind Columbia. Subsequent firings of the LM RCS changed the orbit to 57 by 72 miles. Docking with Columbia occurred on the CSM's 27th revolution at 128 hours, three minutes into the mission. Armstrong and Aldrin returned to the CSM with Collins. Four hours later, the LM jettisoned and remained in lunar orbit.
Trans-Earth injection of the CSM began July 21 as the SPS fired for two-and-a-half minutes when Columbia was behind the moon in its 59th hour of lunar orbit. Following this, the astronauts slept for about 10 hours. An 11.2 second firing of the SPS accomplished the only midcourse correction required on the return flight. The correction was made July 22 at about 150 hours, 30 minutes into the mission. Two more television transmissions were made during the trans-Earth coast.
Re-entry procedures were initiated July 24, 44 hours after leaving lunar orbit. The SM separated from the CM, which was re-oriented to a heat-shield-forward position. Parachute deployment occurred at 195 hours, 13 minutes. After a flight of 195 hours, 18 minutes, 35 seconds - about 36 minutes longer than planned - Apollo 11 splashed down in the Pacific Ocean, 13 miles from the recovery ship USS Hornet. Because of bad weather in the target area, the landing point was changed by about 250 miles. Apollo 11 landed 13 degrees, 19 minutes north latitude and 169 degrees, nine minutes west longitude July 24, 1969.
Crew
Neil Armstrong, Commander
Edwin E. Aldrin Jr., Lunar Module Pilot
Michael Collins, Command Module Pilot

Backup Crew
James A. Lovell, Commander
Fred W. Haise Jr., Lunar Module Pilot
William A. Anders, Command Module Pilot

Payload
Columbia (CSM-107)
Eagle (LM-5)

Prelaunch Milestones
11/21/68 - LM-5 integrated systems test
12/6/68 - CSM-107 integrated systems test
12/13/68 - LM-5 acceptance test
1/8/69 - LM-5 ascent stage delivered to Kennedy
1/12/69 - LM-5 descent stage delivered to Kennedy
1/18/69 - S-IVB ondock at Kennedy
1/23/69 - CSM ondock at Kennedy
1/29/69 - command and service module mated
2/6/69 - S-II ondock at Kennedy
2/20/69 - S-IC ondock at Kennedy
2/17/69 - combined CSM-107 systems tests
2/27/69 - S-IU ondock at Kennedy
3/24/69 - CSM-107 altitude testing
4/14/69 - rollover of CSM from the Operations and Checkout Building to the Vehicle Assembly Building
4/22/69 - integrated systems test
5/5/69 - CSM electrical mate to Saturn V
5/20/69 - rollout to Launch Pad 39A
6/1/69 - flight readiness test
6/26/69 - Countdown Demonstration Test

Launch
July 16, 1969; 9:32 a.m. EDT
Launch Pad 39A
Saturn-V AS-506
High Bay 1
Mobile Launcher Platform-1
Firing Room 1

Orbit
Altitude: 118.65 miles
Inclination: 32.521 degrees
Orbits: 30 revolutions
Duration: eight days, three hours, 18 min, 35 seconds
Distance: 953,054 miles
Lunar Location: Sea of Tranquility
Lunar Coordinates: .71 degrees north, 23.63 degrees east

Landing
July 24, 1969; 12:50 p.m. EDT
Pacific Ocean
Recovery Ship: USS Hornet


credits: NASA
apollo 11 overview

14
Betatest Area / Available
« on: September 06, 2017, 03:41:20 PM »
For any beta testing needed an running sim on 3 devices 1.0.7
Zte prestige 
screen size issue in menu can't scroll to lower graphics settings along with restart button run nicely with high end tablet button ticked
Samsung galaxy s3 
runs the best with settings set at full blown with options on main tab desktop button ticked and ram setting at 100 fits screen also
Polaroid android powered tablets runs like s3 set on high end tablet though the menu only scrolls to just at the graphics sliders on graphics tab and ram slider to full
All in all the sim works great on all three 
Here if needed

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