Launch Vehicle Ready to Launch GPS IIF-5 Published Feb. 20, 2014 LOS ANGELES AIR FORCE BASE, Calif. -- A Delta IV rocket is ready for launch at Cape Canaveral Air Force Station's Space Launch Complex-37 with the Air Force's Global Positioning System IIF-5 payload aboard. The 19-minute launch window is scheduled open up this evening at 8:40 p.m. EST. GPS IIF-5 is the fifth of 12 in a series of next generation GPS satellites and will join a worldwide timing and navigation system utilizing 24 satellites in six different planes, with a minimum of four satellites per plane positioned in orbit approximately 11,000 miles above the Earth's surface.