Interpulse phase coding for improving accuracy of polarimetric SAR

Dino Giuli; Luca Facheris

doi:10.1117/12.140625

12 February 1993 Interpulse phase coding for improving accuracy of polarimetric SAR

Dino Giuli, Luca Facheris

Author Affiliations +

Proceedings Volume 1748, Radar Polarimetry; (1993) https://doi.org/10.1117/12.140625
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Polarimetric measurements made by Synthetic Aperture Radar (SAR) may be in some cases, depending on the polarimetric response of distributed targets to be imaged, severely limited in their accuracy due to the joint effect of range ambiguities and weak crosspolarized signal response. Due to the utilization of alternate transmission of pulses at orthogonal polarizations, each ambiguous swath gives rise to one different kind of interference, depending whether its order is even or odd. Interference arising from even-order ambiguous swaths, differently from that arising from odd-order swaths, is generated by pulses transmitted on the same polarization channel of the pulse soliciting the desired echo signal, that they corrupt. Evidently, interference arising from odd-order swaths and affecting crosspolar measurements is most harmful, together with that arising from zones at low incidence angle, which carries a strong reflectivity contribution to the total interference on the desired signal. The paper discusses the utility of appropriate interpulse phase coding strategies, depending on the SAR geometry, than can be devised and utilized in the polarimetric interleaved-pulse measurement technique, with the task to reduce the interference generated by range ambiguities and affecting those target scattering matrix elements, whose measurement is expected to be most critical.

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Dino Giuli and Luca Facheris "Interpulse phase coding for improving accuracy of polarimetric SAR", Proc. SPIE 1748, Radar Polarimetry, (12 February 1993); https://doi.org/10.1117/12.140625

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KEYWORDS

Polarimetry

Synthetic aperture radar

Scattering

Polarization

Antennas

Radar

Backscatter

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