The launch of NASA's CloudSat and CALIPSO mission has been rescheduled until Tuesday morning after a refueling aircraft for the radar tracking plane was unavailable Sunday morning. Liftoff is scheduled for 6:02 a.m. EDT from Space Launch Complex 2.

CALIPSO and CloudSat are flying into space aboard the swift and dependable Boeing Delta II rocket. With more than 300 successful flights, the dual-stage Delta II is NASA's medium-size payload specialist.