US-A (Upravlenniye Sputnik Aktivny) were active radar satellites for ocean surveillance. The high power consumtion of the active radar required a nuclear reactor as power source. The satellites were known as RORSAT in the west. The US-AO series consisted of satellites, which tested all the system components but the nuclear reactor. They were battery powered.
Low Earth OrbitGemini 10 was the eighth crewed mission of the NASA's Project Gemini. It was commanded by Command Pilot John W. Young and Pilot Michael Collins. Gemini 10 achieved the objectives planned for the last two missions - rendezvous and docking with Agena target vehicle, and EVA. The mission started on July 18, 1966, 22:20:26 UTC and ended on July 21, 1966, 21:07:05 UTC.
Low Earth Orbit