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Proceedings Paper

Ultrawide-bandwidth polarimetric SAR imagery of foliage-obscured objects
Author(s): Dan R. Sheen; Susan C. Wei; Terry B. Lewis; Stuart R. DeGraaf
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Paper Abstract

The Environmental Research Institute of Michigan (ERIM) has developed a unique ground- based, portable, synthetic aperture radar (SAR). This SAR images targets in their natural backgrounds without the expense of an airborne sensor and with higher performance (bandwidth, resolution) than existing airborne systems. A horizontal 36-foot long aluminum truss supports a rail and an antenna carriage, which is moved along the rail to allow synthetic aperture focusing. The system is fully-polarimetric and has collected data over the frequency band of 400 - 1300 MHz resulting in a nominal resolution of 0.17 m in range and 0.5 m in cross-range. Because the system is ground-based and images are in the near field, a traditional spotlight SAR processor is inadequate. ERIM has implemented a near-field SAR processor which transforms the data to the far-field by performing a Fourier transform in the azimuth direction. This is often referred to as a planewave decomposition and results in data sampled as if it were collected in the far-field. The final step is a traditional spotlight processor (resampling and two-dimensional Fourier transform) which is applied to the data to form the image.

Paper Details

Date Published: 28 May 1993
PDF: 8 pages
Proc. SPIE 1875, Ultrahigh Resolution Radar, (28 May 1993); doi: 10.1117/12.145519
Show Author Affiliations
Dan R. Sheen, Environmental Research Institute of Michigan (United States)
Susan C. Wei, Environmental Research Institute of Michigan (United States)
Terry B. Lewis, Environmental Research Institute of Michigan (United States)
Stuart R. DeGraaf, Environmental Research Institute of Michigan (United States)


Published in SPIE Proceedings Vol. 1875:
Ultrahigh Resolution Radar
Roger S. Vickers, Editor(s)

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