United Launch Alliance’s Delta 4-Heavy rocket lifted off at 11:10 a.m. PST (2:10 p.m. EST; 1910 GMT) Saturday from Vandenberg Air Force Base, California, after a month-long delay to troubleshoot a hydrogen leak in one of its boosters. The heavy-lifter was on a mission to send a U.S. government spy satellite into orbit.
The first of up to seven missions planned on United Launch Alliance’s Atlas and Delta rocket fleets this year is scheduled for Saturday from California’s Central Coast, when a Delta 4-Heavy is set for blastoff on a spy satellite delivery flight delayed a month to troubleshoot a hydrogen fuel leak in a booster.
The French military’s newest sharp-eyed optical surveillance satellite lifted off at 1637 GMT (11:37 a.m. EST) Wednesday from French Guiana aboard a Russian-built Soyuz launcher, marking Arianespace’s 11th and final launch of 2018. The Soyuz rocket and Fregat upper stage will place the CSO 1 spacecraft into orbit around 500 miles (800 kilometers) above Earth. Managers delayed the launch from Tuesday due to unfavorable high-altitude winds.