SpaceX's Mega-Constellation Launch: 13 Satellites for Space Development Agency

SpaceX has delayed the launch of 13 Tranche 0 demonstration satellites for the U.S. military's Space Development Agency (SDA) due to an engine issue. The new launch time is targeted for 7:26 a.m. PDT on Friday. The Falcon 9 rocket will carry 11 communications satellites and two tracking satellites, contributing to the future constellation of military missile tracking and data relay satellites. The booster, on its 13th flight, will return to Landing Zone 4 at Vandenberg after launch.