Initial Operational Capability (IOC):
Also Known As: 71X6, 73D6 and Oko-1
Parent System: Oko
Initial Operational Capability (IOC): 1980
Total Production: 70
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Description: The Oko, Eye in English, is a surveillance satellite network intended to provide early warning of ballistic missile launches in support of Russian Strategic Forces. Three Oko spacecraft could have been placed into orbit in June 2009 by a Rokot (modified RS-18/SS-19 Stiletto intercontinental ballistic missile) space launch system. The Oko-1 missile early warning constellation consists of about 70 spacecraft. The fully operational Oko-1 needs four 73D6 satellites placed in a highly elliptical orbit, dubbed Molnya (Lightning), to provide full-time coverage of the area of interest. The 71X6 geosynchronous satellite works as a backup system. As of July 2014 the Oko-1 constellation is in bad shape with the last 71X6 spacecraft lost in April and only two 73D6 satellites operational because no replacement has been launched since 2008.
Service Life: 7 year (2,555 day)
CEP: Circular Error Probable
Meters (m) Kilometers (km) Nautic Miles (nm) Inch (in) Yard (yd) Foot (ft) Millimeter (mm)
Pound (lb) Kilogram (kg) kN (KiloNewton) Ton (t)
Meters per Second (mps) Kilometers per Hour (kph) Knot (kt) Miles per Hour (mph)
Liter (l) Galon (gl)
Year (yr) Minutes (min) Second (sec)
There are 2 news between
17 May 2012 and 8 Dec 2014
Operators & Related Equipment
Grand Total 701
Oko Spacecraft Listing
|Serial||Country - Launch Rocket - Site||Status||Launch Date||Operational||Retired|
|Cosmos 2441|| Soyuz-U - Plesetsk||26 Jul 2008||Aug 2008||-|
|Cosmos 2455|| Soyuz-U - Plesetsk||20 Nov 2009||Dec 2009||-|
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