USA-71

USA-71
NamesNavstar 2A-02
GPS IIA-2
GPS II-11
GPS SVN-24
Mission typeNavigation
OperatorU.S. Air Force
COSPAR ID1991-047A [1]
SATCAT no.21552
Mission duration7.5 years (planned)
20 years (achieved)
Spacecraft properties
SpacecraftGPS-IIA
Spacecraft typeGPS Block IIA[2]
ManufacturerRockwell International
Launch mass840 kg (1,850 lb)
Dimensions5.3 m (17 ft) of long
Power710 watts
Start of mission
Launch date4 July 1991, 02:32:00 UTC
RocketDelta II 7925-9.5
(Delta D206) [3]
Launch siteCape Canaveral, LC-17A
ContractorMcDonnell Douglas
Entered service14 August 1991
End of mission
DisposalGraveyard orbit
Deactivated30 September 2011
Orbital parameters
Reference systemGeocentric orbit[4]
RegimeMedium Earth orbit
(Semi-synchronous)
SlotD1 (slot 1 plane D)
Perigee altitude19,451 km (12,086 mi)
Apogee altitude20,250 km (12,580 mi)
Inclination55.30°
Period704.60 minutes
← USA-66 (GPS IIA-1)
USA-79 (GPS IIA-3) →

USA-71, also known as GPS IIA-2, GPS II-11 and GPS SVN-24, is an American navigation satellite which forms part of the Global Positioning System. It was the second of nineteen Block IIA GPS satellites to be launched.

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