Monday, 6 August 2007
Halls C & D (Cairns Convention Center)
The successful launch of CloudSat Cloud Profiling Radar (CPR) enables scientists to assess cloud coverage and cloud microphysics properties in global scale. The CALIPSO & CloudSat Validation EXperiment (CCVEX) provides the first opportunity for thorough validation of NASA A-train satellite sensors including CLoudSat and CALIPSO. There were two goals for CCVEX: to validate the sensitivity and calibration for the CloudSat radar and the CALIPSO lidar, and to validate the initial A-train microphysical algorithms. The NASA GSFC Cloud Radar System (CRS) is a 94 GHz Doppler radar, which operates at the same frequency as the CloudSat CPR. Flying CRS on a high altitude aircraft enables us to simulate the CloudSat radar and provide independent validation for the spaceborne radar. During CCVEX, CRS was deployed on a NASA ER-2 along with NASA GSFC Cloud Physics Lidar (CPL) and NASA Ames MODIS Airborne Simulator (MAS). A total of 12 flights were conducted under CloudSat/CALIPSO satellite overpasses between July 24 and August 14, 2006, observing a variety of thin and thick cirrus, mid-level clouds, precipitating clouds as well as ocean surface returns. This paper discusses the post CCVEX analysis on CRS measurement from clouds and ocean surface. The later is used as a calibration reference for both CRS and CPR. Preliminary results will be shown from the inter-comparison of CRS and CloudSat CPR measurements.
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