Delta 4 launch seen from press viewing site (members only)

SpaceX test-fired a Falcon 9 rocket at Cape Canaveral on Saturday in a pre-flight checkout designed to verify the launcher’s engines are ready to loft a U.S. military GPS navigation satellite into orbit Nov. 5. An engine problem forced SpaceX to abort a launch attempt in early October.

The United Launch Alliance Delta 4 Medium+ (5,4) rocket lifted off Wednesday at 6:53 p.m. EST (2353 GMT) from Cape Canaveral to deploy the latest craft for the U.S. military’s Wideband Global SATCOM communications satellite constellation.

Likened to raising a cellular tower 22,300 miles high, a United Launch Alliance Atlas 5 rocket will put the Navy’s fourth mobile communications satellite into space to expands the rugged smartphone system to global coverage.