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Wideband measurements of ice sheet attenuation and basal scattering

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6 Author(s)
Paden, J.D. ; Dept. of Electr. Eng. & Comput. Sci., Univ. of Kansas, Lawrence, KS, USA ; Allen, C.T. ; Gogineni, S. ; Jezek, K.C.
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We are developing a multifrequency multistatic synthetic aperture radar (SAR) for determining polar ice sheet basal conditions. To obtain data for designing and optimizing radar performance, we performed field measurements with a network-analyzer-based system during the 2003 field season at the North Greenland Ice Core Project camp (75.1 N and 42.3 W). From the measurements, we determine the ice sheet complex transfer function over the frequency range from 110-500 MHz by deconvolving out the system transfer function. Over this frequency range, we observe an increase in total loss of 8±2.5 dB using a linear regression to the log-scale data. With the ice sheet transfer function and an ice extinction model, we estimate the return loss from the basal surface to be approximately 37 dB. These measurements have broad applicability to interpreting radar-sounding data, which are widely used in glaciological studies of the polar ice sheets. These data have also been used in the link budget for the design considerations of the multifrequency multistatic SAR system.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:2 ,  Issue: 2 )

Date of Publication:

April 2005

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