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 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 WIKIA batch of 28 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
A batch of 27 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Satellite be used as calibration target for ground based orbital objects surveillance services such as atmospheric space environment study and orbita…
Officially described as "Satellite-Internet Technology Demonstration Satellites". Probable 4 test satellites for the Chinese state-owned LEO communic…
Fram2 is the world’s first astronaut mission to polar orbit. Named after the Norwegian polar research ship Fram, the Crew Dragon spacecraft will laun…
A batch of 28 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
First flight of the Isar Spectrum launch vehicle.
Chinese classified satellite claimed to be for communication technology test purposes. Actual mission not known.
A batch of 27 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Tianlian is a Chinese data tracking and relay communications geostationary satellite series. The TL 2 (Tian Lian 2) satellites represent the second g…