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OKEAN 2

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OKEAN 2 is classified as:


NORAD ID: 20510
Int'l Code: 1990-018A
Perigee: 562.8 km
Apogee: 581.5 km
Inclination: 82.5 °
Period: 96.0 minutes
Semi major axis: 6943 km
RCS: 10.2318 m2 (large)
Launch date: February 28, 1990
Source: Commonwealth of Independent States (former USSR) (CIS)
Launch site: PLESETSK MISSILE AND SPACE COMPLEX (PKMTR)

The Okean series of satellites were all-weather radar oceanographic systems primarily designed to monitor sea-ice conditions in the Arctic seas. The payload included a side-looking radar, a scanning microwave radiometer, a nadir-viewing microwave spectrometer, optical scanners and a data collection platform. The spacecraft was a stepped cylindrical pressurized bus 3 m high and 1.4 m diameter. It was 3-axis stabilized (nadir pointing, aided by a gravity gradient boom), had a twin solar array spanning 4.82 m and an 11.8 m radar antenna mounted on the Earth-facing base.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 20510U 90018A   22222.34016285  .00001554  00000-0  12068-3 0  9990
2 20510  82.5173 164.5278 0013528 103.3847  64.6925 15.00610308742070
Source of the keplerian elements: AFSPC