Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Methodology of INSAR data processing for the sake of glacier monitoring

A new methodology for INSAR surveying and modelling of glacial dynamics and morphology has been designed, tested and verified. Comparing to the conventional DINSAR method, our algorithm based on the calculation of interferometric phase gradients (GINSAR), the generation of glacier slope maps and the analysis of differences between multitemporal slope maps provides global, simple and fast solution to the precise modelling of the glacier surface, unsupervised glacier change detection and motion estimation.

Apart from the technological simplicity and robustness, the GINSAR algorithm does not involve the procedure of interferometric phase unwrapping thus excluding the areal error propagation and improving the modelling accuracy. Experimental studies proved the efficacy and robustness of our new algorithm. Some 17 INSAR models of the HF and SV test sites have been processed until the present time and all the results were entirely satisfactory. The time required for processing one differential model did not exceed 4 hours.

The algorithm has been implemented in the new RSG 4.0 software package distributed by the Joanneum Research, Austria. The GINSAR technique can be successfully applied to accounting for temporal changes in the glacier accumulation rate and the glacier mass balance at regional scale. The high metric quality, detail and complementary thematic contents of the value-added INSAR products demonstrate the essential potential of this method and its applicability to solving various tasks in the area of unsupervised glacier change detection and analysis irrespectively of INSAR data sources.

Informations connexes

Résultat en bref

Reported by

Joanneum Research Forschungsgesellschaft mbH
Wastiangasse 6
8010 Graz
See on map