Passive satellite-based SAR (synthetic aperture radar) antenna range direction two-way directional diagram measurement method

According to the passive satellite-based SAR antenna range direction two-way directional diagram measurement method provided by the invention, the surveying and mapping bandwidth and the calibration reference target of satellite-borne SAR antenna range direction directional diagram measurement can be arranged on the ground, and high-frequency autonomous calibration is realized without manual participation. According to the method, a low-cost calibration satellite carrying a passive calibrator is used as a reference target, the problem of satellite-borne SAR antenna distance direction two-way directional diagram measurement is solved through reasonable orbit design, surveying and mapping bandwidth and a calibration reference target which are faced by satellite-borne SAR antenna distance direction directional diagram measurement are arranged on the ground, and the measurement accuracy is improved. Moreover, the method can achieve high-frequency autonomous calibration, and does not need manual intervention. 本发明提