Satellite-borne microwave scatterometer in-orbit direction icon calibration method based on active calibrator

The invention discloses a satellite-borne microwave scatterometer in-orbit direction icon calibration method based on an active calibrator. The method comprises the following steps: obtaining pitch angles and azimuth angles of wave beams at different moments under a scatterometer antenna system according to position information of the active calibrator; according to the pointing information and the position information of the active scaler, pitch angles and azimuth angles of wave beams at different moments under an active scaler antenna system are obtained; according to the power signal received by the active scaler and the pitch angle and the azimuth angle of the wave beam at different moments under the active scaler antenna system, the data receiving power of the active scaler at different moments is obtained; and obtaining an antenna pattern of the scatterometer according to the received data power of the active scaler at different moments. According to the method, directional diagram calibration under rap