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 20 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
3 weather satellites performing atmospheric measurements using GNSS Radio Occultation for a Tianjin based company. Constellation is planned to have a…
Maiden Flight of the Ariane 62 launch vehicle, carrying ten cubesats, two deployers, five experiments, and two reentry capsules.
Türksat 6A is Turkey's first domestically manufactured geostationary communications satellite. It is to reside in 42° East orbital slot, providing se…
A pair of satellites officially described as for cartographic surveying purposes, details TBD.
Fifth flight of the Firefly Alpha small sat launcher, carrying eight cubesats for NASA's ELaNa 43 (Educational Launch of a Nanosatellite) mission.
A batch of 20 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
The Advanced Land Observing Satellite-4 (ALOS-4) is a Japanese satellite designed to observe the Earth's surface using a phased array type L-band syn…
Chinese communication geostationary satellite for unknown purposes.
Second batch of satellites for a reconnaissance satellite constellation built by SpaceX and Northrop Grumman for the National Reconnaissance Office t…