AIRBORNE RADIO ECHO SOUNDING OF OUTLET GLACIERS IN GREENLAND

We used a coherent radar depth sounder operating at 150 MHz to collect ice thickness data on outlet glaciers in northwestern Greenland. The radar data were collected in conjunction with laser surface elevation measurements and were tagged with GPS information for accurate geoloca tion. The radar signals were corrupted by multiple echoes between the aircraft and the ice surface, as well as between the ice surface and t he ice-bedrock interface. We applied the homomorphic deconvolution tec hnique to remove multiple echoes successfully and have identified the grounding line of a long ice shelf in northwestern Greenland.