USA-251
File:Navstar-2F.jpg
A Block IIF GPS satellite
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Mission type | Navigation |
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Operator | US Air Force |
COSPAR ID | 2014-026A[1] |
SATCAT № | 39741[1] |
Mission duration | 12 years (planned) |
Spacecraft properties | |
Spacecraft | GPS SVN-67 (IIF-6) |
Spacecraft type | GPS Block IIF |
Manufacturer | Boeing |
Launch mass | 1,630 kilograms (3,590 lb)[2] |
Start of mission | |
Launch date | 17 May 2014, 00:03 | UTC
Rocket | Delta IV-M+(4,2), D365[3] |
Launch site | Cape Canaveral SLC-37B[3] |
Contractor | ULA |
Orbital parameters | |
Reference system | Geocentric |
Regime | Medium Earth (Semi-synchronous) |
Perigee | 20,443 km (12,703 mi)[4] |
Apogee | 20,474 km (12,722 mi)[4] |
Inclination | 55.04 degrees[4] |
Period | 729.22 minutes[4] |
Epoch | 17 May 2014 |
USA-251, also known as GPS IIF-6, GPS SVN-67 and NAVSTAR 70, is an American navigation satellite which forms part of the Global Positioning System. It was the sixth of twelve Block IIF satellites to be launched.[2]
Launch
Built by Boeing and launched by United Launch Alliance, USA-251 was launched at 00:03 UTC on 17 May 2014, atop a Delta IV carrier rocket, flight number D366, flying in the Medium+(4,2) configuration.[3] The launch took place from Space Launch Complex 37B at the Cape Canaveral Air Force Station,[5] and placed USA-251 directly into medium Earth orbit.[4]
Orbit
As of 17 May 2014, USA-251 was in an orbit with a perigee of 20,443 kilometers (12,703 mi), an apogee of 20,474 kilometers (12,722 mi), a period of 729.22 minutes, and 55.04 degrees of inclination to the equator.[4] It is used to broadcast the PRN 06 signal, and operates in slot 6 of plane D 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 June 10, 2014.[6]
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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