Girish Mahajan (Editor)

USA 242

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Mission type
  
Navigation

COSPAR ID
  
2013-023A

Mission duration
  
12 years (planned)

Inclination
  
55°

Period
  
12 hours

Launch date
  
15 May 2013

Operator
  
US Air Force

SATCAT no.
  
39166

Spacecraft
  
GPS SVN-66 (IIF-4)

Inclination
  
55°

Launch mass
  
1,630 kg

Rocket
  
Atlas V

USA-242

Similar
  
USA‑243, USA‑245, Drag and Atmosph, TDRS‑11, AAUSAT3

USA-242, also known as GPS IIF-4, GPS IIF SV-5 and Vega, is an American navigation satellite which was launched on 15 May 2013 and became operational on 21 June 2013. The fourth Block IIF GPS satellite, it forms part of the Global Positioning System.

USA-242 is a 1,630-kilogram (3,590 lb) spacecraft, built by Boeing with a design life of 15 years. It operates from a semi-synchronous medium Earth orbit, at an altitude of 20,459 kilometers (12,713 mi) an inclination of 55 degrees, in slot 5 of plane C of the GPS constellation. The new satellite was originally intended to replace the seventeen-year-old USA-117 satellite, but currently both USA-117 (SVN-33) and USA-242 (SVN-66) are in active use. USA-242 broadcasts its navigation signals using the PRN-27 signal modulation.

United Launch Alliance conducted the launch of GPS IIF-4, using an Atlas V 401 carrier rocket. Launch took place from Space Launch Complex 41 at the Cape Canaveral Air Force Station, with liftoff occurring at 21:38 UTC on 15 May 2013, the beginning of an 18-minute launch window. The launch marked the first time since 1985 that a GPS satellite had launched on an Atlas rocket, or indeed any rocket other than a Delta.

References

USA-242 Wikipedia