1. Department of Geological Sciences; University of North Carolina at Chapel Hill; Chapel Hill North Carolina USA
2. Remote Sensing Solutions, Inc.; Pasadena California USA
3. Department of Geography; University of California; Los Angeles California USA
4. School of Geographical Sciences; University of Bristol; Bristol UK
5. Laboratoire d'Etudes en Géophysique et Océanographie Spatiale, UMR 5566; CNES/CNRS/IRD/Université de Toulouse, Observatoire Midi-Pyrénées; Toulouse France
6. School of Earth Science and Byrd Polar and Climate Research Center; Ohio State University; Columbus Ohio USA