Soil Moisture Estimation Using Hybrid Polarimetric SAR Data of RISAT-1 Ponnurangam, G. G. ; Jagdhuber, Thomas ; Hajnsek, Irena ; Rao, Y. S. Abstract Publication: IEEE Transactions on Geoscience and Remote Sensing Pub Date: April 2016 DOI: 10.1109/TGRS.2015.2494860 Bibcode: 2016ITGRS..54.2033P