USA-251

USA-251
A Block IIF GPS satellite
Mission typeNavigation
OperatorUS Air Force
COSPAR ID2014-026A[1]
SATCAT no.39741[1]
Mission duration12 years (planned)
Spacecraft properties
SpacecraftGPS SVN-67 (IIF-6)
Spacecraft typeGPS Block IIF
ManufacturerBoeing
Launch mass1,630 kilograms (3,590 lb)[2]
Start of mission
Launch date17 May 2014, 00:03 (2014-05-17UTC00:03Z) UTC
RocketDelta IV-M+(4,2), D365[3]
Launch siteCape Canaveral SLC-37B[3]
ContractorULA
Orbital parameters
Reference systemGeocentric
RegimeMedium Earth
(Semi-synchronous)
Perigee altitude20,443 km (12,703 mi)[4]
Apogee altitude20,474 km (12,722 mi)[4]
Inclination55.04 degrees[4]
Period729.22 minutes[4]
Epoch17 May 2014

USA-251, also known as GPS IIF-6, GPS SVN-67 and NAVSTAR 70, is an American navigation satellite which forms part of the Global Positioning System. It was the sixth of twelve Block IIF satellites to be launched.[2]

  1. ^ a b "Navstar 70". US National Space Science Data Center. Retrieved 17 May 2014.
  2. ^ a b Cite error: The named reference GSP was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference LL was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference satcat was invoked but never defined (see the help page).