Variations in radar backscatter across the great ice sheets

Noltimier, K.F.; Jezek, K.

doi:10.1109/igarss.1996.516271

Cited by 1 publication

(1 citation statement)

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“…Based on the analysis of 50 km resolution ERS-1 scatterorneter data Rott and Rack [2] reported that azimuthal anisotropy is pronounced in strong katabatic wind zone. Noltimier and Jezek [3] also observed azimuthal anisotropy from overlapping ascending and descending ERS-1 S A R images on a pixel by pixel basis. Here we rely on the high resolution of Radarsat data and the unique imaging geometry at South Pole to more completely characterize the azimuthal response.…”

Section: Introductionmentioning

confidence: 88%

Radar backscatter measurements from RADARSAT SAR imagery of South Pole Station, Antarctica

Suhn

Jezek²,

Baumgärtner³

et al.

IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)

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Ice Sheet backscatter around South Pole Station was measured from several different azimuthal angles using RADARSAT-1 S A R data. We observed strong azimuthal anisotropy (3-4 dB) between radar look directions across and along the prevailing wind direction. We speculate that the azimuthal variation of backscatter around the South Pole area may be largely attributed to systematically oriented sastrugi and buried sastrugi. Radar backscatter is well correlated with surface topography over a spatial wavelength band of 15 to 20 km. We propose that grain size variations control backscatter patterns associated with undulating surface topography * 0-7803-5207-6/99/$10.00 0 1999 IEEE. 2360

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Section: Introductionmentioning

confidence: 88%