1. Institute for Geophysics; University of Texas at Austin; Austin Texas USA
2. Center for Remote Sensing of Ice Sheets; University of Kansas; Lawrence Kansas USA
3. Department of Geological Sciences; University of Texas at Austin; Austin Texas USA
4. U.S. Geological Survey; Lakewood Colorado USA
5. Institute for Arctic and Alpine Research; University of Colorado Boulder; Boulder Colorado USA
6. Geophysical Institute; University of Alaska Fairbanks; Fairbanks Alaska USA
7. Department of Space Studies; Southwest Research Institute; Boulder Colorado USA
8. Department of Earth System Science; University of California; Irvine California USA
9. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA