SpaceX, with its Falcon 9 and Falcon Heavy rockets, is the only current provider with fully NSSL-certified vehicles and the ability to launch from both ranges. ULA’s Vulcan rocket was certified for NSSL missions on March 26 after two demonstration missions, but its Western Range launchpad at Vandenberg remains “in work,” Panzenhagen said.

The launch is scheduled for April 9, with a window between 12 p.m. and 3 p.m. EDT, from Cape Canaveral Space Force Station in Florida.

Depending on weather and cloud cover, you may see ULA's massive Atlas V rocket as it launches from Cape Canaveral Space Force Station in Florida. It begins with the first-ever launch of the Amazon Project Kuiper production satellites, courtesy of the ULA Atlas V rocket.

ULA and Blue Origin, which build rocket engines and assemble space vehicles in Huntsville and Decatur, join existing provider SpaceX.