DETERMINATION OF GLACIER VELOCITIES ON KING GEORGE ISLAND (ANTARCTICA) BY DINSAR

摘要

The Antarctic Peninsula is a region very sensitive to climate change. To estimate the climatic impact on glaciers several parameters like the velocity field have to be known. Radar interferometry is a feasible method in such remote areas. The available ERS tandem pairs with reasonable baselines have been processed for King George Island, but only 5 out of 17 showed enough coherence. Only one of them could in the end be processed to a complete velocity field of the island with movement rates of up to 120m per year. External elevation data was necessary for the chosen processing approach. Validation with DGPS measurements from several field campaigns shows good agreement with the interferometric derived velocities.