Delta IV M+(4,2) | GPS IIF-6 (USA-251)

Delta IV M+(4,2) | GPS IIF-6 (USA-251)

Space Launch Complex 37B
Cape Canaveral, FL, USA













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United Launch Alliance

United 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.



GPS IIF (Global Positioning System) or Navstar-2F (Navigation System using Timing And Ranging) satellites are the fourth evolution stage of the second generation of the GPS satellites. Improvements included an extended design life of 12 years, faster processors with more memory, and a new civil signal on a third frequency.

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Delta IV M+(4,2)

Height 66.20 Meters

Max Stages 2

Mass To GTO 6270 kg

Liftoff Thrust 4200 kN

Diameter 5.00 Meters

Mass To LEO 11920 kg

Liftoff Mass 292 Tonnes

Launch Success 15

Consecutive Success 15

Maiden Flight 2002-11-20

Launch Failures 0



Global Positioning System

The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.

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