The GPS-IIR replenishment satellites are produced by General Electric Astrospace (later Martin Marietta and Lockheed Missiles & Space) under a contract issued in 1989, which included 21 satellites based on the commercial AS-4000 bus. These provided improved navigation accuracy and longer autonomous satellite operation than earlier model GPS satellites. The satellites were three-axis stabilized and operated at downlink frequencies of 1572.42 MHz and 1227.6 MHz (L-Band) and 2227.5 MHz (S-Band). Lockheed was responsible for launch and flight operations support of the GPS-IIR through 2006.
Delta II is an American space launch system developed by McDonnell Douglas, now part of the Delta rocket family operated by United Launch Alliance. With more than 150 missions and a nearly perfect track record, Delta II has established itself as one of the most successful orbital launch systems.
See Delta DetailsUnited Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.
INFO WIKINew high resolution Earth observation satellite for the Jilin-1 commercial Earth observation satellites constellation.
A batch of 22 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Payload consists of a single SAR Earth-imaging Acadia satellite, a new generation satellite designed, manufactured, and operated by Capella Space.
Chinese reconnaissance satellites.
A batch of satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Soyuz MS-24 carried two cosmonauts and one astronaut to the International Space Station aboard the Soyuz spacecraft from the Baikonur Cosmodrome in K…
Third flight of the Firefly Alpha small sat launcher, carrying a payload for the US Department of Defense.
A batch of 21 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Classified space situational awareness (SSA) payload for the US National Reconnaissance Office (NRO).
3 Chinese reconnaissance satellites of unknown purposes, officially reported as for "Electromagnetic environment probing" purposes.