A Boeing-built satellite will give the U.S. military a stronger global positioning system, Air Force officials said.
The satellite, one of 12 in a new generation of Boeing-built GPS IIF systems, was to launch at Cape Canaveral, Fla., at 11:25 p.m. EDT Friday, the Air Force said.
The launch was moved to Friday night after mission managers Thursday needed to replace a piece of equipment used to control a swing arm on a fixed tower.
Forecasts showed an 80 percent chance of favorable weather for a launch Friday night, Florida Today reported.
The GPS, designed to improve the performance of U.S. satellites already in space, would be the first GPS satellite to ride a Delta IV into orbit.