Manufacturer: Rockwell International

Altitude: 10,900 nautical miles

Weight: 1900 lbs (in orbit)

Size:17 ft with solar panels extended

Orbital Period: 12 hours

Orbital Plane: 55 degrees to equitorial plane

Planned Lifespan: 7.5 years

Current constellation: 24 Block II production satellites

Future satellites: 21 Block IIrs developed by Martin Marietta