USA-92

USA-92
Mission type Navigation
Operator US Air Force
COSPAR ID 1993-042A[1]
SATCAT № 22700[1]
Mission duration 7.5 years (planned)[2]
Spacecraft properties
Spacecraft type GPS Block IIA[2]
Manufacturer Rockwell[2]
Launch mass 1,816 kilograms (4,004 lb)[2]
Start of mission
Launch date 26 June 1993, 13:27:00 (1993-06-26UTC13:27Z) UTC
Rocket Delta II 7925-9.5, D221[3]
Launch site Cape Canaveral LC-17A[3]
End of mission
Disposal Placed in a graveyard orbit
Deactivated 19 May 2014, 22:00:00 (2014-05-19UTC23Z) UTC
Orbital parameters
Reference system Geocentric
Regime Medium Earth
(Semi-synchronous)
Perigee 20,120 kilometres (12,500 mi)[4]
Apogee 20,244 kilometres (12,579 mi)[4]
Inclination 54.7 degrees[4]
Period 717.96 minutes[4]

USA-92, also known as GPS IIA-12, GPS II-21, GPS SVN-39, and NAVSTAR 39, is an American navigation satellite which forms part of the Global Positioning System. It was the twelfth of nineteen Block IIA GPS satellites to be launched.

USA-92 was launched at 13:27:00 UTC on 26 June 1993, atop a Delta II carrier rocket, flight number D221, 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-92 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.[2]

On 27 July 1993, USA-92 was in an orbit with a perigee of 20,120 kilometres (12,500 mi), an apogee of 20,244 kilometres (12,579 mi), a period of 717.96 minutes, and 54.7 degrees of inclination to the equator.[4] It broadcasts the PRN 09 signal, and operates in slot 1 of plane A of the GPS constellation.[6] The satellite has a mass of 1,816 kilograms (4,004 lb). It had a design life of 7.5 years;[2] however, it was kept in service for over 20 years before finally decommissioned from service on May 19, 2014.[7]

Following decommissioning, it was subsequently placed in a disposal orbit approximately 1000km above the operational constellation on September 21, 2015.[8]

References

  1. 1 2 "Navstar 2A-12". US National Space Science Data Center. Retrieved 10 July 2012.
  2. 1 2 3 4 5 6 Krebs, Gunter. "GPS-2A (Navstar-2A)". Gunter's Space Page. Retrieved 10 July 2012.
  3. 1 2 3 McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 10 July 2012.
  4. 1 2 3 4 5 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.
  7. "NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2014046". United States Coast Guard. Retrieved 21 May 2014.
  8. "2 SOPS adapts new disposal approval process". United States Air Force. Retrieved 31 October 2015.
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