Navstar 81 -GPS Satellite

Navstar 81, the first evolution stage of the third generation of the GPS satellites. This program will improve position, navigation, and timing services for the warfighter and civil users worldwide and provide advanced anti-jam capabilities yielding superior system security, accuracy and reliability.

Constellation Information

Satellite Information

NameNavstar 81
CountryUnited States
ManufacturerLockheed Martin
Launch DateJune 17, 2021
Launch SiteCape Canaveral, United States
Launch VehicleFalcon 9
Mission Duration15 years (planned)
Launch Mass4332 Kg
OrbitMedium Earth Orbit
Apogee Altitude20,216 Km (12,562 mi)
Perigee Altitude20,163 Km (12,529 mi)
Satellite BlockGPS Block III
Period718.0 minutes
Pseudo Random Noise Code11
Inclination Angle55.3 Deg
COSPAR ID2021-054A
SATCAT Number48859
Other Names48859, USA 319