Today's attempt to launch the CALIPSO and CloudSat satellites was scrubbed at T-48 seconds due to loss of the primary and backup phone communications between the Mission Director Center at Vandenberg Air Force Base and the Centre National d'Etudes Spatiales (CNES) Space Command in Toulouse, France. The NASA launch manager has directed his team to reset the launch systems and prepare for another opportunity to launch the mission tomorrow.

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. Liftoff of the flight is scheduled for 6:02 a.m. EDT from Space Launch Complex 2.