A polarimetric SAR internal calibration scheme for polarization crosstalk

This is the authors' abstract. We don't add key points for this paper.

The system of polarimetric SAR is introduced and internal calibration schemes are discussed. The measurement method of crosstalk between horizontal (H) and vertical (V) polarization channels using internal calibration loops is proposed. Couplers at H and V polarization antennas are designed to hold different coupling factors to make the crosstalk measurable. The compensation model for the polarization scattering matrix is proposed and discussed. As a result, the crosstalk can be tracked with internal calibration and the polarization scattering matrix can be compensated. Simulations are conducted to research the measurement accuracy of crosstalk.