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Mapping Glacier Velocities at Spitsbergen Using ERS Tandem SAR Data Bjørn Wangensteen*, Dan Johan Weydahl**, Jon Ove Hagen* *Department of Physical Geography,

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Presentation on theme: "Mapping Glacier Velocities at Spitsbergen Using ERS Tandem SAR Data Bjørn Wangensteen*, Dan Johan Weydahl**, Jon Ove Hagen* *Department of Physical Geography,"— Presentation transcript:

1 Mapping Glacier Velocities at Spitsbergen Using ERS Tandem SAR Data Bjørn Wangensteen*, Dan Johan Weydahl**, Jon Ove Hagen* *Department of Physical Geography, University of Oslo, PO Box 1042 Blindern, 0316 Oslo, Norway **Norwegian Defence Research Establishment, Division of Electronics, PO Box 25, 2007 Kjeller, Norway

2

3 Raw DINSAR

4 Theoretical Cross Section of a Glacier Surface in a DINSAR before and after Unwrapping

5 Calculation of Glacier Velocities

6 Raw DINSAR

7 Median Filtered DINSAR

8 Gradient Filtered DINSAR

9 Thresholded DINSAR

10 Vectorized DINSAR

11 Displacement towards the Satellite

12 Calculation of glacier velocities from DINSAR V glac = U / (cos(h)cos(  )sin(  )+cos(  )sin(h))

13 Velocity Field of Isachsenfonna

14 Velocity Field of Akademikerbreen

15 Velocity Field of Nordbreen


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