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 9 Low Earth Orbit communication satellites for the Chinese state owned SatNet constellation operated by the China Satellite Network Group.…
Two technology demonstration satellites for satellite transmissions of signals for the VHF Data Exchange System (VDES), a successor to the current Au…
A batch of 28 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
First test launch of LandSpace’s ZQ-3 rocket, with a dummy payload. The rocket’s 1st stage will attempt to land on a landing pad about 300 km downran…
A batch of 29 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.
KOMPSAT-7 is the follow-up model of KOMPSAT-3A whose mission is to provide high-resolution satellite images to satisfy South-Korea's governmental and…
A batch of 29 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Classified experimental Chinese satellite of unknown purposes.