Last update: December 14th, 2019 at 8:00 am
Inside the Astrotech Payload Processing Facility on Vandenberg Air Force Base in California, workers check the Upper Delta Payload Attach Fitting (UDPAF) holding the CALIPSO spacecraft. CALIPSO will be mated with the Lower Delta Payload Attach Fitting (LDPAF) that contains the CloudSat satellite. The PAF is the interface between the spacecraft and the second stage of the rocket. CALIPSO stands for Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation.