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The fundamental method of the active coded radiometric calibration technique is analyzed. The theory of reducing the influence of background clutter signal to the precision of radiometric calibration by active coded radiometric calibration technique is explained. Digital coded technique is applied to avoid phase-shifting error of the phase-shifter used in the analog coded method. An experiment is...
The development and performance of a prototype coded Active Radar Calibration (ARC) in S-band, which is used as a ground calibration reference standard for Synthetic Aperture Radar(SAR), are described. The coded ARC uses phase shifting and delay techniques which affect the SAR signal in azimuth and range. The ratio of the ARC signal to the background signal is improved. An internal gain stabilization...
Polarimetric SAR can provide amplitude and phase information of targets, thus is widely used. For high image data quality, accurate ground calibration targets are needed. This paper describes a prototype multifunctional Polarimetric Active Radar Calibrator (PARC). An experiment was made in microwave darkroom to prove the applicability of PARC in polarimetric SAR calibration.
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