Focused synthetic aperture radar processing of ice-sounder data collected over the Greenland ice sheet

The authors developed a synthetic aperture radar (SAR) processing algorithm for airborne/spaceborne ice-sounding radar systems and applied it to data collected in Greenland. By using focused SAR (phase-corrected coherent averaging), they improved along-track resolution by a factor of four and provid...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2001-10, Vol.39 (10), p.2109-2117
Main Authors: Legarsky, J.J., Gogineni, S.P., Akins, T.L.
Format: Article
Language:English
Subjects:
Airborne radar
Algorithms
Clutter
Coherence
Earth, ocean, space
Estimates
Exact sciences and technology
External geophysics
Gain
Greenland
Ground penetrating radar
Ice sheets
Ice thickness
NASA
Radar
Radar measurements
Sea measurements
Shape
Signal processing algorithms
Snow. Ice. Glaciers
Spaceborne radar
Synthetic aperture radar
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Summary:The authors developed a synthetic aperture radar (SAR) processing algorithm for airborne/spaceborne ice-sounding radar systems and applied it to data collected in Greenland. By using focused SAR (phase-corrected coherent averaging), they improved along-track resolution by a factor of four and provided a 6-dB processing gain over unfocused SAR (coherent averaging without phase correction) based on a point-target analysis for a Greenland ice-sounding data set. Also, They demonstrated that the focused-SAR processing reduced clutter and enabled them to identify bedrock-interface returns buried in clutter. Using focused-SAR technique, they processed data collected over a key 360-km-long portion of the 2000-m contour line of southwest Greenland. To the best of their knowledge, these are the first high-quality radar ice thickness measurements over this key location. Moreover, these ice-thickness measurements have been used for improving mass-balance estimates of the Greenland ice sheet.
ISSN:0196-2892
1558-0644
DOI:10.1109/36.957274