The Research On An In-Orbit External Calibration Method Of Aperture Synthetic Radiometer

In the aperture synthetic radiometer system, good correction of systematic errors is the precondition of high quality image. So far the calibration of the receiving channel errors has been down relatively well, however, the calibration of the antenna errors remains to be improved. The paper proposed an in-orbit external calibration method for aperture synthetic radiometer using external points on the ground, and the method aimed at the antenna error. Simulation proved the accuracy and feasibility of the method, then the implementary scheme was discussed. The method is of significant referential value to the image quality improvement and the practical engineering realization.