RocketSTEM Issue #6 - March 2014 | Page 80

Photo: Chris Haber A United Launch Alliance (ULA) Delta IV rocket successfully launched the Global Positioning System (GPS) IIF-5 satellite for the U.S. Air Force on Feb. 20 at 8:59 p.m. EST from Space Launch Complex-37. The rocket was delayed until the last minute of the launch window due to solar activity. GPS IIF-5 is the fifth in a series of 24 next-generation GPS satellites. The GPS IIF series provides improved accuracy and enhanced performance for GPS users. Photo: Julian Leek/JNN Delta IV takes military GPS satellite into orbit