1 research outputs found
A PS-based approach for the calilbration of spaceborne polarimetric SAR systems
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 is practically
feasible for any SAR sensor) nor to any external information.
These latter are eventually demanded afterwards in order to
normalize the returned PDM stack to an absolute reference.
The PolPSCal mathematical framework is reported, and a performance
analysis with concern to the PS detection and the
PDM estimates accuracy is carried out on both synthetic data
and a 29 images RADARSAT-2 dataset