Merging of Elevations from SAR Interferometry, Satellite Altimetry, GPS and Laser Altimetry in Greenland

Cecilia Svenné Nielsen		National Survey and Cadastre, Geodynamics Office, Rentemestervej 8, DK-2400 Copenhagen NV, Denmark csn@kms.min.dk http://www.kms.min.dk
René Forsberg		National Survey and Cadastre, Geodynamics Office, Rentemestervej 8, DK-2400 Copenhagen NV, Denmark rf@kms.min.dk http://www.kms.min.dk
Simon Ekholm		National Survey and Cadastre, Geodynamics Office, Rentemestervej 8, DK-2400 Copenhagen NV, Denmark se@kms.min.dk http://www.kms.min.dk
Johan Jacob Mohr		Danish Center for Remote Sensing, Dept. of Electromagnetic Systems, Technical University of Denmark, DK-2800 Lyngby, Denmark jm@emi.dtu.dk http://www.dcrs.dtu.dk

Abstract

The merging of elevations data from different sources in order to produce a consistent height model is a major challenge, especially in rugged areas like the coastal regions of Greenland. In the paper early results from the combination of SAR data from the ERS-1/2 tandem mission with photogrammetric, GPS and airborne laser ranging data are presented for local areas in East Greenland. It is hoped that SAR interferometry in the future will provide a significant improvement of the ice surface and rock digital elevation model of Greenland, currently produced from a mixture of satellite and airborne altimetry over the ice and surveying / photogrammetry in the ice-free regions.
Keywords: Surface elevations, merging of data.

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry