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The paper debates a novel solution for the longterm monitoring of the system polarimetric quality based on radiometrically and polarimetrically stable targets, herewith named Polarimetric Permanent Scatterers (PPS). The technique is completely scene-based and thus cost effective. It allows, aided by the integration with the available Distributed Target (DT) information, for the relative calibration...
The paper debates an external calibration approach based on the stable natural targets, namely Permanent Scatterers (PS), that can be spotted in the illuminated frame. The method, hereby called PolPSCal, allows for relative calibration of the full 4 by 3 polarimetric distortion matrices (PDMs) affecting the stack images. The algorithm is neither constrained to a particular PDM model (thus its implementation...
Optical leveling campaigns, tiltmeters, GPS and InSAR are geodetic techniques used to detect and monitor surface deformation phenomena. In particular, InSAR data from satellite radar sensors are gaining increasing attention for their cost-effectiveness and unique technical features, making possible the monitoring of large areas, even revisiting the past. Moreover, more advanced InSAR techniques (PSInSAR™,...
The paper proposes a calibration technique based on Permanent Scatterers (PS) for the full-pol L-band and future P-band spaceborne SAR systems. It will be shown how both a radiometric and polarimetric monitoring of the system parameters can be carried out by exploiting the stable targets in the scene. The procedure aims to estimate the overrall system gain, the channel imbalances, and the Faraday...
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