Delta II at Complex 17, pad A
Delta II at Complex 17, pad A Zoom

It is October 1, 1990, and a Delta II (specifically, a Delta 6925), awaits launch at Complex 17, pad A. This Delta II carries as payload a GPS Block II satellite: Navstar BII-09. This is part of the operational GPS II Global Positioning System constellation.

The Delta II is manufactured by Boeing, and has been in use since 1989. The first Delta II was launched on February 14, 1989, and carried a GPS II satellite into orbit. In fact, the Delta II was the launch vehicle for the entire constellation of GPS II satellites.

Delta II specifications and performance
Length 130 ft. Diameter 8 ft.
Stage Stage name Engine(s) Propellant(s) Thrust
0 Castor 4A 9 Alliant Techsystems TX-780 Solid 766,015 lbs.
1 Delta Thor XLT 1 Rocketdyne RS-27A LOX, RP-1 234,000 lbs.
2 Delta K 1 Aerojet AJ10-118K N2O4, Aerozine-50 9,810 lbs.
3 PAM-D 1 Thiokol STAR 48 Solid 18,500 lbs.

Return to Complex 17
Photo courtesy of U.S. Air Force (from Jonathan's Space Home Page).
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