Determination of Ice-flow Velocity at the Polar Record Glacierand Dalk Glacier Using DInSAR

Objective ERS-1/2tandem SAR images acquired in 1996were utilized to map the ice-flow velocity ofthe Polar Record and Dalk Glaciers using DInSAR.The horizontal component was derived from line-of-sight velocity estimates,and compared with the field measurements.The DInSAR results revealedan ice velocity map of the whole area.For the inland areas,the DInSAR results were in good agree-ment with field measurements.As for the front of the Dalk Glacier,the ice velocity derived from DIn-SAR was smaller than the field measurements because of the differences between data acquisitiontimes,tidal motion,etc.