The SpaceX Falcon 9 rocket, scheduled to launch a U.S. Air Force navigation satellite, sits on Launch Complex 40, Florida, U.S., December 18, 2018.
The SpaceX Falcon 9 rocket, scheduled to launch a U.S. Air Force navigation satellite, sits on Launch Complex 40, Florida, U.S., December 18, 2018.

Elon Musk's SpaceX scrapped Saturday's launch of a long-delayed navigation satellite for the U.S. military due to strong upper-level winds.

The next launch attempt will be on Sunday at 8:51 a.m. EST/13:51 UTC, according to Space X officials.

The launch would have been the rocket firm's first national security space mission for the United States.