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Foliage attenuation and backscatter analysis of SAR imagery

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4 Author(s)
Fleischman, J.G. ; Lincoln Lab., MIT, Lexington, MA, USA ; Ayasli, S. ; Adams, E.M. ; Gosselin, D.R.

The ability of a synthetic aperture radar (SAR) to detect targets under foliage is in part determined by the attenuation suffered by radiation propagating through the foliage and the backscatter from the foliage. MIT Lincoln Laboratory made measurements of foliage attenuation and backscatter using the NASA/JPL-UHF, L-, C-band fully-polarimetric SAR in July 1990. In this experiment, a 48 km 2 forested area near Portage, Maine was imaged. Twenty-seven 8 ft trihedral corner reflectors were arrayed throughout the imaged area in order to measure foliage attenuation. Ground truth was recorded at the time of the experiment in order to correlate the attenuation and backscatter results with foliage biophysical properties. The probability densities for foliage attenuation and for backscatter are determined as functions of frequency, polarization, and depression angle.

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:32 ,  Issue: 1 )