Kosmos 772 ( meaning Cosmos 772) was an uncrewed military Soyuz 7K-S test. It was an unsuccessful mission as only one transmitter worked. Only the 166 MHz frequency transmitter operated, all of the other normal Soyuz wavelengths transmitters failed.astronautix.com, Soyuz 7K-SSoviet Space Programs, 1976-80: Manned space programs and space life sciences The experience from these flights were used in the development of the successor program Soyuz spacecraft the Soyuz 7K-ST.astronautix.com soyuz7k-s
Mission parameters Spacecraft: Soyuz 7K-S Mass: 6750 kg Crew: None Launched: September 29, 1975 Landed: October 3, 1975 4:10 UTC Perigee: 154 km Apogee: 245 km Inclination: 51.8 deg Duration: 3.99 days
Maneuver Summary 193 km X 270 km orbit to 195 km X 300 km orbit. Delta V: 8 m/s. 196 km X 300 km orbit to 196 km X 328 km orbit. Delta V: 8 m/s.
Total Delta V: 16 m/s.
See also
Cosmos 670 Cosmos 869
References