The 330-foot tall mobile service tower is rolled away from the United Launch Alliance Delta 4 rocket at Cape Canaveral’s pad 37B in the hours before the scheduled liftoff on Dec. 7 at 6:53 p.m. EST (2353 GMT).

The change will allow the U.S. Space Force to expedite the process of building out its GPS constellation in medium Earth orbit. The launch date for the next satellite, GPS III Space Vehicle 09, could be within weeks.

A collection of pad photos from the United Launch Alliance Atlas 5 rocket flight to deploy the Global Positioning System 2F-11 navigation satellite.