In October 1965, Elliot M. See and Charles A. Bassett II were selected to fly Gemini IX. Chief Astronaut Deke Slayton also told them that their backups would be Thomas Stafford and Eugene Cernan. At that time Stafford was copilot for Gemini VI…
The Gemini Program was conceived after it became evident to NASA officials that an intermediate step was required between Project Mercury and the Apollo Program. The major objectives assigned to Gemini were:
1-To subject two men and supporting equipment to long duration flights — a requirement for projected later trips to the moon or deeper space.
2-To effect rendezvous and docking with other orbiting vehicles, and to maneuver the docked vehicles in space, using the propulsion system of the target vehicle for such maneuvers.
3-To perfect methods of reentry and landing the spacecraft at a pre-selected land-landing point.
4-To gain additional information concerning the effects of weightlessness on crew members and to record the physiological reactions of crew members during long duration flights.
From the previous episode, we have Gemini VII waiting in orbit for Gemini VI-A to launch and rendezvous. Remember, Gemini VII could only remain in orbit for 14 days, the maximum duration of its flight. The goal was to launch Gemini VI-A on or before day 9 of Gemini VII’s mission.
From the previous episode, it was decided that the name of Gemini VI would be changed to Gemini VI-a to distinguish it from the originally planned mission whose objective was to rendezvous with the Agena target vehicle. Gemini VII would be launched first before Gemini VI-a and it would be considered the target vehicle effectively replacing the Agena. After Gemini VII lifted off, Gemini VI-a would be transferred to the launch pad and prepared to launch as soon as possible. After Gemini VI-a rendezvoused with Gemini VII, it would return to earth before Gemini VII.