USA-258

USA-258, also known as GPS IIF-8, GPS SVN-69 and NAVSTAR 72, is an American navigation satellite which forms part of the Global Positioning System. It was the eighth of twelve Block IIF satellites to be launched.[2]

USA-258
A Block IIF GPS satellite
Mission typeNavigation
OperatorUS Air Force
COSPAR ID2014-068A[1]
SATCAT no.40294[1]
Mission duration12 years (planned)
Spacecraft properties
SpacecraftGPS SVN-69 (IIF-8)
Spacecraft typeGPS Block IIF
ManufacturerBoeing
Launch mass1,630 kilograms (3,590 lb)[2]
Start of mission
Launch date29 October 2014, 17:21 (2014-10-29UTC17:21Z) UTC
RocketAtlas V 401, AV-050[3]
Launch siteCape Canaveral SLC-41[3]
ContractorULA
Orbital parameters
Reference systemGeocentric
RegimeMedium Earth
(Semi-synchronous)
Perigee altitude20,455 km (12,710 mi)[4]
Apogee altitude20,480 km (12,730 mi)[4]
Inclination55.00 degrees[4]
Period729.56 minutes[4]
Epoch29 October 2014
 

Launch

Built by Boeing and launched by United Launch Alliance, USA-258 was launched at 17:21 UTC on 29 October 2014, atop a Atlas V 401 carrier rocket, vehicle number AV-050.[3] The launch took place from Space Launch Complex 41 at the Cape Canaveral Air Force Station,[5] and placed USA-258 directly into medium Earth orbit.[4]

Orbit

As of 29 October 2014, USA-258 was in an orbit with a perigee of 20,455 kilometers (12,710 mi), an apogee of 20,480 kilometers (12,730 mi), a period of 729.56 minutes, and 55.00 degrees of inclination to the equator.[4] It is used to broadcast the PRN 03 signal, and operates in slot 1 of plane E of the GPS constellation. The satellite has a design life of 15 years and a mass of 1,630 kilograms (3,590 lb). [2] It is currently in service following commissioning on December 12, 2014.[6]

References
  1. "Navstar 72". US National Space Science Data Center. Retrieved 29 October 2014.
  2. Krebs, Gunter. "GPS-2F (Navstar-2F)". Gunter's Space Page. Retrieved 29 October 2014.
  3. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 29 October 2014.
  4. McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 29 October 2014.
  5. McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 29 October 2014.
  6. "NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2014090". United States Coast Guard. Retrieved 13 December 2014.


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