A SpaceX Falcon 9 is scheduled to launch the SARah 2 & 3 satellites for the German military. The twin craft, equipped with passive synthetic aperture radar reflectors, will liftoff from Vandenberg Space Force Base during an 83-minute window that opens at 5:11 a.m. PST / 8:11 a.m. EST / 1311 UTC on Sunday, Dec. 24.