Nadezhda (satellite)

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Nadezhda (Russian: Надежда, means Hope in English) is a civilian satellite navigation system and part of the international COSPAS-SARSAT search-and-rescue system.

Overview

The system consists of four satellites, each with a mass of 870kg, diameter of 2m and length of 3.5.[1] They orbit at an inclination of 89 degrees and an altitude of 1,000 km. The satellites carry the COSPAS-SARSAT transponder system, used by ships and aircraft in distress to summon help. Generally, the Nadezhda satellites will be able to get a fix on the ship's position with better than 5 km accuracy.[2]

The satellites were first introduced in 1989. A newer version, called Nadezhda-M is reportedly smaller than the original one. It is due to be replaced by the Sterkh satellites.[2] Nadezhda-M6 was launched on 28 June, 2001. Nadezhda-M7 was launched on 26 September, 2002.[2] The satellites are designed and manufactured by Production Corporation Polyot.

References

  1. ↑ "Spacecraft "Nadezhda"". PO Polyot. Retrieved 2009-09-20. 
  2. ↑ 2.0 2.1 2.2 Harvey, Brian (2007). "Military programs". The Rebirth of the Russian Space Program (1st ed.). Germany: Springer. ISBN 978-0-387-71354-0. 
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