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Ice flow in northeast Greenland derived using balance velocities as control

Satellite radar interferometry provides an important new means for measuring ice motion. To make absolute velocity measurements, ground-control points typically are required to refine interferometric baseline estimates. The vast scale and remote location of the ice sheets make it difficult to obtain...

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Bibliographic Details
Main Authors: Joughin, I., Fahnestock, M., Thomas, B., Kwok, R.
Format: Conference Proceeding
Language:English
Subjects:
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Summary:Satellite radar interferometry provides an important new means for measuring ice motion. To make absolute velocity measurements, ground-control points typically are required to refine interferometric baseline estimates. The vast scale and remote location of the ice sheets make it difficult to obtain in situ ground-control data. Balance velocities derived from satellite altimetry digital-elevation models (DEMs) provide an alternate, though less accurate, source of control data. The authors demonstrate a case in which they are able to achieve an accuracy of just over 3 m/yr using this type of control.
DOI:10.1109/IGARSS.1998.703801