23 December 1997 Solvability of some inverse problems in radar polarimetry
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It is well known that, in the course of ionospheric propagation, the polarization state of radar signals is changed between transmitter and target, and again between target and receiver. For HF skywave radars, these changes may vary spatially and temporally in a quasi-random manner. When one wishes to determine the scattering matrix of a target, the presence of these unknown polarization transformations changes the nature of the inverse problem connecting received echoes with target scattering characteristics. Indeed, it is by no means obvious that the inverse problem is solvable. In this paper we demonstrate that, under certain realistic conditions, the scattering matrix can be estimated in the presence of a priori unknown polarization transformations in the propagation medium.
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Stuart J. Anderson, Stuart J. Anderson, Yuri I. Abramovich, Yuri I. Abramovich, Wolfgang-Martin Boerner, Wolfgang-Martin Boerner, } "Solvability of some inverse problems in radar polarimetry", Proc. SPIE 3120, Wideband Interferometric Sensing and Imaging Polarimetry, (23 December 1997); doi: 10.1117/12.300625; https://doi.org/10.1117/12.300625

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