A Matched-filter Technique For Removing Hyperbolic Effects Due To Point Scatterers: Simulation And Application On Antarctic Radar Data
A modern coherent radar for probing the ice sheets of Antarctica and Greenland (the University of Kansas coherent Antarctic radar depth sounder was successfully operated at the Downstream camp on ice stream B, a dynamic glacier in west Antarctica, in the austral summer of 1987-1988. The results clea...
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Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 1990-07, Vol.28 (4), p.726-729 |
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Sprache: | eng |
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Zusammenfassung: | A modern coherent radar for probing the ice sheets of Antarctica and Greenland (the University of Kansas coherent Antarctic radar depth sounder was successfully operated at the Downstream camp on ice stream B, a dynamic glacier in west Antarctica, in the austral summer of 1987-1988. The results clearly showed strong bottom echoes and several layered structures. One of the inherent problems prevalent in wide-angle radar observation is the undesirable hyperbolic echo profiles caused by isolated scatterers. A similar problem in seismic shooting is solved by migration methods. Although this effect has been considerably reduced in the radar by choosing a higher frequency and unfocused processing, it is still observed in the data. A matched-filter technique for removing these effects involves generating a number of reference functions and cross-correlating with the data. The correlation maximum determines the location of the isolated scatterers. This process is done in the frequency domain using FFTs applied on both the data and the reference function. Performance has been simulated for several cases of point scatterers. (I.E.) |
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ISSN: | 0196-2892 1558-0644 |
DOI: | 10.1109/TGRS.1990.572992 |