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GPS Block IIIF, or GPS III Follow On (GPS IIIF), is the second set of GPS Block III satellites, consisting of up to 22 space vehicles. The United States Air Force began the GPS Block IIIF acquisition effort in 2016. [7] On 14 September 2018, a manufacturing contract with options worth up to $7.2 billion was awarded to Lockheed Martin.
The Contingency Operations effort enables GPS III satellites to participate in the GPS constellation, albeit in a limited fashion, without having to wait until OCX Block 1 becomes operational (scheduled for 2022). The United States Space Force awarded the US$96 million Contingency Operations contract in February 2016. [74]
Samples of three GPS satellites' orbits over a five-year period (2013 to 2018) USA-242 · USA-239 · USA-151 · Earth As of 22 January 2025, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 3 are in reserve or testing, 43 are retired, 2 were lost during launch, and 1 prototype was never launched. 3 Block III satellites have completed ...
Fifth GPS Block III satellite, named Neil Armstrong: USA-320: 2022-01-13 2022-002CV Falcon 9 Block 5: Unknown Launched with USA-321, USA-322 and USA-323 on Transporter 3 Rideshare Launch. Likely the satellites were built by SpaceX based on the Starshield bus (based on Starlink Block v1.5 technology), were deployed by the US army.
Like earlier GPS satellites, Block IIF spacecraft operate in semi-synchronous medium Earth orbits, with an altitude of approximately 20,460 km (12,710 mi), and an orbital period of twelve hours. The satellites supplement and partially replace the GPS Block IIA satellites that were launched between 1990 and 1997 with a design life of 7.5 years ...
U.S. Space Force space systems Name Space system image Mission Operator AN/FPS-85: Space surveillance: Mission Delta 2: C-Band Space Surveillance Radar System [184] Space surveillance: Mission Delta 2: Cobra Dane: Missile defense Space surveillance [185] Mission Delta 4: Ground-Based Electro-Optical Deep Space Surveillance (GEODSS) Space ...
Two satellites were launched aboard the Space Shuttle Atlantis in 1985 during the STS-51-J flight. As of 14 September 2021, six DSCS-III satellites were still operational. [ 2 ] DSCS operations are currently run by the 4th Space Operations Squadron out of Schriever Space Force Base .
Advanced Extremely High Frequency (AEHF) is a constellation of communications satellites operated by the United States Space Force.They are used to relay secure communications for the United States Armed Forces, the British Armed Forces, the Canadian Armed Forces, the Netherlands Armed Forces and the Australian Defence Force. [3]