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Nadezhda (11F643N, 17F118)

Nadezhda

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
Operator:
Contractors: NPO Prikladnoi Mekhaniki (NPO PM)
Equipment:
Configuration: KAUR-1
Propulsion:
Power: Solar cells, batteries
Lifetime:
Mass: 820 kg
Orbit: typical 950 km × 1005 km, 82.9°
Satellite COSPAR Date LS Launch Vehicle Remarks
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
Further Tsikada / Nadezhda missions:

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