Name: NAVSTAR
Manufacturer: Rockwell International
Altitude: 20,200 kilometers
Weight:860 kilograms (in orbit)
Size:5 meters with solar panels extended
Orbital Period: 12 hours
Orbital Plane: 55 degrees to equatorial plane
Planned Lifespan: 7.5 years
Current constellation: 24 satellites
Future satellites: 21 developed by Martin Marietta.