1. Friedrich Schiller University Jena,Department for Earth Observation,Jena,Germany
2. German Aerospace Center (DLR), Microwaves and Radar Institute (HR),Wessling,Germany
3. Centre for Ecological and Forestry Applications (CREAF),Cerdanyola del Vallès,Spain
4. University of Georgia,School of Electrical and Computer Engineering,Athens,GA,USA
5. Universitat Politècnica de Catalunya,CommSensLab, and Institut d’Estudis Espacials de Catalunya,Department of Signal Theory and Communications,Barcelona,Spain
6. Max Planck Institute for Biogeochemistry,Department Biogeochemical Processes,Jena,Germany