ABSTRACT
Polarimetric Synthetic Aperture Radar (PolSAR) measures the four scattering components of a target and assists investigation into backscattering property and application studies more effectively than using single or dual SAR. Polarimetric calibration (PolCAL), used to attain the rigorous input-output relationship, is very important in order to fully utilize the PolSAR data. However, the procedure is difficult due to many unknowns. Several PolCAL methods have been proposed, with a variety of models and assumptions. Robustness relies on radar stability, model simplification, and the scattering properties of natural targets.
In this chapter, we will (1) describe PolCAL methodology, (2) summarize the assumptions, (3) introduce a new PolCAL method using the rainforest and an artificial target, (4) provide validation using ALOS/PALSAR and comparative studies, (5) evaluate accuracy, and (6) draw conclusions.
