Cloud observation with CRL airborne cloud profiling radar (SPIDER)

Cloud profiling radar can measure global distribution of cloud. Not only the information of the height of cloud tops and bases but also the information of particle shapes and water content (including whether ice or water) are expected. Multiparameter function of radar can be used for such purpose and the precise calibration of radar is necessary. The possibility for usage of sea surface return as an external calibration target is proposed because is stable under known condition of sea state. In addition, results of airborne measurements will be shown.