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NAVSTAR 23 (USA 71)

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    NAVSTAR 23 (USA 71) can be found in the following categories:
    GPS Operational

    NORAD ID: 21552
    Int'l Code: 1991-047A
    Perigee: 20,914.5 km
    Apogee: 21,059.2 km
    Inclination: 54.4 °
    Period: 750.6 minutes
    Semi major axis: 27357 km
    Launch date: July 4, 1991
    Source: United States (US)
    PRN:
    Comments: Global Positioning System (GPS) was developed by the US Department of Defense to provide all-weather round-the-clock navigation capabilities for military ground, sea, and air forces. Since its implementation, GPS has also become an integral asset in numerous civilian applications and industries around the globe, including recreational used (e.g., boating, aircraft, hiking), corporate vehicle fleet tracking, and surveying. GPS employs 24 spacecraft in 20,200 km circular orbits inclined at 55 degrees. These vehicles are placed in 6 orbit planes with four operational satellites in each plane.

    Two Line Element Set (TLE):

    1 21552U 91047A   14244.21859964 -.00000003  00000-0  00000+0 0  4555
    2 21552 054.3644 148.3340 0026450 060.8643 029.2800 01.91858360168759
    
    
    Source: AFSPC

    NASA's NSSDC Master Catalog entry for NAVSTAR 23 (USA 71)

     
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