USA-90

USA-90, also known as GPS IIA-10, GPS II-19 and GPS SVN-31, was an American navigation satellite which formed part of the Global Positioning System. It was the tenth of nineteen Block IIA GPS satellites to be launched.

USA-90
Mission typeNavigation
OperatorUS Air Force
COSPAR ID1993-017A[1]
SATCAT no.22581[1]
Mission duration7.5 years (planned)[2]
Spacecraft properties
Spacecraft typeGPS Block IIA[2]
ManufacturerRockwell[2]
Launch mass1,816 kilograms (4,004 lb)[2]
Start of mission
Launch date30 March 1993, 03:09:00 (1993-03-30UTC03:09Z) UTC
RocketDelta II 7925-9.5, D219[3]
Launch siteCape Canaveral LC-17A[3]
End of mission
Deactivated24 October 2005 (2005-10-25)
Orbital parameters
Reference systemGeocentric
RegimeMedium Earth
(Semi-synchronous)
Perigee altitude20,076 kilometres (12,475 mi)[4]
Apogee altitude20,287 kilometres (12,606 mi)[4]
Inclination54.9 degrees[4]
Period717.96 minutes[4]
 

USA-90 was launched at 03:09:00 UTC on 30 March 1993, atop a Delta II carrier rocket, flight number D219, flying in the 7925-9.5 configuration.[3] The launch took place from Launch Complex 17A at the Cape Canaveral Air Force Station,[5] and placed USA-90 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.[2]

On 2 May 1993, USA-90 was in an orbit with a perigee of 20,076 kilometres (12,475 mi), an apogee of 20,287 kilometres (12,606 mi), a period of 717.96 minutes, and 54.9 degrees of inclination to the equator.[4] It broadcast PRN 31, and operated in slot 3 of plane C of the GPS constellation.[6] The satellite had a mass of 1,816 kilograms (4,004 lb). It had a design life of 7.5 years,[2] and ceased operations on 24 October 2005.

References
  1. "Navstar 2A-10". US National Space Science Data Center. Retrieved 10 July 2012.
  2. Krebs, Gunter. "GPS-2A (Navstar-2A)". Gunter's Space Page. Retrieved 10 July 2012.
  3. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 10 July 2012.
  4. McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 10 July 2012.
  5. McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 10 July 2012.
  6. Wade, Mark. "Navstar". Encyclopedia Astronautica. Retrieved 10 July 2012.


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