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 WIKIAmazon Leo, formerly known as Project Kuiper, is a mega constellation of satellites in Low Earth Orbit that will offer broadband internet access, thi…
USSF-87 will launch two identical Geosynchronous Space Situational Awareness Program (GSSAP) satellites GSSAP-7 and GSSAP-8 directly to a near-geosyn…
Elektro-L is a series of meteorological satellites developed for the Russian Federal Space Agency by NPO Lavochkin. They are designed to capture real…
Carried 7 satellites to sun-synchronous orbit, including PRSC-EO2 (Earth observation satellite for the Pakistan government's SUPARCO) & CUHK-1. Detai…
A batch of 24 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
A batch of 25 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
4th flight of the Chinese spaceplane capable of returning to Earth.
Unknown classified payload(s) for the Russian military.
A batch of 25 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Earth observation satellite built by China's CAST for the Algerian Space Agency.