Doppler Correction for Polarimetric Scattering Matrix Measurements of Time-Variant Random Targets.

Abstract

In many remote sensing applications the observed targets experience small but non-negligible variations even in the small time interval is required to perform the S-matrix measurement. Doppler phase correction scheme can be applied which compensates for the deterministic mean target motion.The Doppler phase correction method and the related estimation errors are studied in greate detail, employing a quite general model of time-variant random targets. Matching the pulse repetition frequency properly to the decorrelation time of the observed target, allows the measurement and processing of polarimetric S-matrix series with maximum information content on the target.