Mission Trajectory And Maneuver Description

(Note: Information presented herein is based upon a nominal mission and is subject to change prior mission or In real time during the mission to meet changing conditions.)


Apollo 9 Is scheduled to be launched at 11 a.m. EST from NASA Kennedy Space Center Launch Complex 39A on a 72-degree azimuth and inserted Into a 103 nm (119 sm, 191.3 km) circular Earth orbit by Saturn V launch vehicle No. 504. Insertion will take place at 10 minutes 59 seconds after liftoff.

Transposition and Docking

Following insertion into orbit, the S-IVB third stage maintains an attitude level with the local horizontal while the Apollo 9 crew conducts post-Insertion CSM systems checks and prepares for a simulated S-IVB translunar injection restart.

At 2 hours 34 minutes ground elapsed time (GET) the S-IVB enters transposition and docking attitude (15 degree pitch, 35 degree yaw south); and the CSM separates from the S-IVB at 2 hours 43 minutes GET at one fps to about 50 feet separation, where velocity is nulled and the CSM pitches 180 degrees and closes to near the lunar module docking collar for station keeping. Docking is completed at about 2 hours 53 minutes GET and the is pressurized with the command module surge tanks and reentry bottles.

LM Ejection and Separation

The lunar module is ejected from the spacecraft/UM adapter by spring devices at the four LM landing gear "knee attach points. A three-second SM RCS burn separates the CSM/LM for crew observation of the first S-IVB restart.

S-IVB Restarts

After spacecraft separation, the S-IVB resumes a local horizontal attitude for the first J-2 engine restart at 4:45:41 GET. The CSM/IM maintains a separation of about 2,000 feet from the S-IVB for the restart. A second S-IVB restart at o :07:04 GET followed by propellant dumps place the S-IVB In an Earth escape trajectory and into solar orbit.


Facts About Apollo
0 0

Post a comment