Soyuz 11A510 | US-AO 1

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.

Mission type: Government/Top Secret · Orbit: Low Earth Orbit

Rocket: Soyuz 11A510 · Provider: Soviet Space Program