After being postponed three times due to ground system errors and bad weather, Air Force Space Command-4 launched on July 28 from Cape Canaveral Air Force Station, FL.
The Delta IV carrying AFSPC-4's three space situational awareness satellites lifted off at 7:28 p.m., and was the United Launch Alliance's eighth launch in 2014. The mission included two Geosynchronous Space Situational Awareness Program satellites, which will be used by U.S. Strategic Command to monitor geosynchronous orbit for potentially nefarious space capabilities.
The third satellite is part of the Air Force Research Laboratory's Automated Navigation and Guidance Experiment for Local Space. ANGELS will conduct space situational awareness maneuvers and its mission is largely classified.
The Air Force and ULA are now preparing for their next launch -- a Global Positioning System satellite, GPS IIF-7, which is set to lift off Friday evening.