Insar Phase Unwrapping: a Polarimetric Approach

Polarimetric interferometric SAR data analysis is a helpful tool to discriminate the different kinds of artefacts. Most of them are encountered over volume areas, under the form of a phase centre bias. Recently, many studies have been proposed to estimate the interferometric phase over forest areas (Papathanassiou and Cloude (1), Yamada et al. (2)). One of them is based on the ESPRIT (Estimation of Signal Parameters via Rotational Invariance Techniques) algorithm, often employed for Direction-Of-Arrival estimation using antenna arrays, proposed by Yamada et al. (2). For volume areas, this algorithm can directly retrieve the interferometric phases of the ground and the canopy.