ON IMPROVEMENT OF BARE SURFACE SOIL MOISTURE ESTIMATION WITH L-BAND DUAL-POLARIZATION RADAR
【摘要】：The capability to predict global water- and energy-cycle consequences of Earth-system variability and change is one of the key issues in the Earth-system science study. It requires the improved capability to monitor spatial and temporal distributed soil moisture accurately. On the capability of the instruments side, the available active microwave sensors, such as ASAR on ENVISAT, RADARSAT, and PALSAR on ALOS, do not provide the capability to monitor global soil moisture information at the temporal scale required in the atmospheric and hydrologic models. The passive microwave sensor AMSR-E on the EOS-Aqua has the high temporal resolution, but its capability is limited to low vegetation and very shallow surface layer. SMAP, with both active and passive L-band microwave instruments, will provide a significantly improved capability of monitoring soil moisture at the spatial and temporal sampling scales required by modeling and prediction of representing soil moisture related processes in the atmospheric and hydrologic models.