Single-polarization SAR imaging in the presence of Faraday rotation

We discuss the single-polarization SAR imaging with the Faraday rotation (FR) taken into account. The FR leads to a reduction in the intensity of the received radar signal that varies over the signal length. That, in turn, results in a degradation of the image. In particular, the image of a point ta...

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Bibliographic Details
Published inInverse problems Vol. 30; no. 7; pp. 75002 - 27
Main Authors Gilman, Mikhail, Smith, Erick, Tsynkov, Semyon
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.07.2014
Subjects
anisotropic ionosphere
Anisotropy
Autocorrelation
correction of the matched filter
deterioration of radar image
evaluation of Faraday rotation effect
image autocorrelation analysis
Imaging
magnetic field of the Earth
Matched filters
propagation of radio waves through gyrotropic plasma
Radar
Reduction
Wave propagation
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Summary:We discuss the single-polarization SAR imaging with the Faraday rotation (FR) taken into account. The FR leads to a reduction in the intensity of the received radar signal that varies over the signal length. That, in turn, results in a degradation of the image. In particular, the image of a point target may have its intensity peak split in the range direction. To distinguish between the cases of low reflectivity and those where the low antenna signal is due to the FR, we employ the image autocorrelation analysis. This analysis also helps determine the parameters of the FR, which, in turn, allow us to introduce an approach for correcting the single-polarization SAR images distorted by FR.
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ISSN:0266-5611
1361-6420
DOI:10.1088/0266-5611/30/7/075002