Navigation
NAVSTAR 63 (USA 203)
GPS Navigation Satellite (Block IIR-M) · US Space Force
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Navstar 63 (USA 203), launched in 2007, is one of the final Block IIR-M satellites, part of the generation that brought the jam-resistant M-code signal to operational strength across the GPS constellation before the next major upgrade — Block IIF — began adding the L5 aviation safety-of-life signal specifically demanded by pilots and air traffic controllers. Block IIR-M's eight-satellite production run bridged GPS from its original 1990s design toward the more capable Block IIF generation, introducing the jam-resistant M-code signal that gave US and allied forces a meaningfully more secure military positioning option.
Its orbit
- Orbit
- Medium Earth Orbita high vantage point, ideal for navigation
- Altitude
- 12,302–12,787 mi (19,799–20,579 km)
- Inclination
- 54.5°
- One orbit
- 12.0 hours2.0 orbits a day
- NORAD ID
- 34661
- Int’l designator
- 2009-014A
- Launched
- 2009
Orbital elements from CelesTrak, as of 22 Sep 2026.
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