Nadezhda (11F643N, 17F118) was a Soviet civilian satellite navigation system used by the Soviet Merchant Marine and Academy of Sciences, but also by the military, as part of the Tsikada constellation. They featured also a COSPAS search and rescue system.
The Nadezhda and Tsikada satellites were very similar to the Parus satellites and also used a NPO PM built pressurized cylindrical bus with gravity-gradient stabilization. The satellites transmitted Doppler-shifted VHF transmissions at around 150 MHz and 400 MHz of their position and orbital characteristics. They operated from a 1000 km orbit with 82.9° inclination. Satellites were placed in planes spaced 45° apart.
The development of Tsikada began in 1974 and the first satellite was launched in 1976. The system entered the operational phase in 1978.
Nine satellites were launched, all on Kosmos-3M boosters. Three received Kosmos designations, the remaning were launched as Nadezhda.
A modified Nadezhda-M was launched as the tenth Nadezhda satellite.
|Nation:||USSR / Russia|
|Type / Application:||Navigation / SAR Transponder|
|Contractors:||NPO Prikladnoi Mekhaniki (NPO PM)|
|Power:||Solar cells, batteries|
|Orbit:||typical 950 km × 1005 km, 82.9°|
|Kosmos 1383 (Nadezhda #1, COSPAS 1)||1982-066A||29.06.1982||Pl LC-132/1||Kosmos-3M|
|Kosmos 1447 (Nadezhda #2, COSPAS 2)||1983-021A||24.03.1983||Pl LC-132/2||Kosmos-3M|
|Kosmos 1574 (Nadezhda #3, COSPAS 3)||1984-062A||21.06.1984||Pl LC-132/2||Kosmos-3M|
|Nadezhda 1 (Nadezhda #4, COSPAS 4)||1989-050A||04.07.1989||Pl LC-133/3||Kosmos-3M|
|Nadezhda 2 (Nadezhda #5, COSPAS 5)||1990-017A||27.02.1990||Pl LC-132/2||Kosmos-3M|
|Nadezhda 3 (Nadezhda #6, COSPAS 6)||1991-019A||12.03.1991||Pl LC-133/3||Kosmos-3M|
|Nadezhda 4 (Nadezhda #7, COSPAS 7)||1994-041A||14.07.1994||Pl LC-133/3||Kosmos-3M|
|Nadezhda 5 (Nadezhda #8, COSPAS 8)||1998-072A||10.12.1998||Pl LC-132/1||Kosmos-3M||with Astrid 2|
|Nadezhda 6 (Nadezhda #9, COSPAS 9)||2000-033A||28.06.2000||Pl LC-132/1||Kosmos-3M||with Tsinghua 1, SNAP 1|