Watch a replay of the launch of a Japanese navigation satellite

A previously-undisclosed payload funded by a U.S. military research agency rode into orbit with a Spanish communications satellite on SpaceX’s most recent Falcon 9 rocket launch March 6, officials said Friday.

A SpaceX Falcon 9 rocket lifted off from Vandenberg Air Force Base in California at 10:17:10 a.m. EDT (7:17:10 a.m. PDT; 1417:10 GMT) Wednesday with the Radarsat Constellation Mission for the Canadian government. The Falcon 9’s first stage successfully landed back at Vandenberg around eight minutes later.

Six satellites are set to ride a light-class European Vega rocket into orbit from French Guiana on Wednesday night, the first Vega launch since a failure last year that officials attributed to human error.