The property of sea surface scattering in millimeter wave $satellite-borne cloud profiling radar calibration

For calibrating a satellite-borne cloud radar, widely distributed natural targets are necessary because of the difficulty of antenna beam pointing. Sea surface scattering is considered as one good target. The problem is that the sea surface scattering property in mm waves (95 GHz) has not been reported. The authors have measured the sea surface scattering by a CRL airborne cloud radar (SPIDER) performed around the Japan Sea area or the Pacific Ocean. The sea surface property measured from this experiment is similar to that measured in a microwave scatterometer.