Frequency Calibration for the Scattering Matrix of the Simultaneous Polarimetric Radar

In order to obtain precise measurements of the target scattering matrix, the simultaneous fully polarimetric radar imposes strict requirements on the frequency stability in terms of accurate sampling rate and intermediate frequency (IF). In this letter, the effect of frequency stability on the fully polarimetric radar with a pair of orthogonal linear frequency modulated waveforms is analyzed. Furthermore, a calibration method is proposed to calibrate the IF and the sampling rate. The calibration results demonstrate and verify the validity of the proposed method.