KENNEDY SPACE CENTER, FLA. - Inside the Astrotech Payload Processing Facility on Vandenberg Air Force Base in California, workers surround the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) spacecraft as it is lowered toward a workstand. CALIPSO will undergo state-of-health checks, and electrical ground-support equipment testing. CALIPSO will fly in combination with the CloudSat satellite to provide never-before-seen 3-D perspectives of how clouds and aerosols form, evolve, and affect weather and climate. CALIPSO and CloudSat will join three other satellites in orbit to enhance understanding of climate systems. The launch date for CALIPSO_CloudSat is no earlier than Aug. 22.