| 摘要 |
PURPOSE:To obtain a processing method further enhanced in azimuth angle determination accuracy, by forming two synthetic aperture beams so as to have a sharp notch at the time of the imaging processing of an echo signal and determining an azimuth angle by utilizing said notch. CONSTITUTION:The echo signal from an object obtained by synthetic aperture radar is preliminarily received and recorded and imaging processing is performed on the basis of this recording data by a correlation method. At this time, a reference function for forming two main beams (synthetic aperture beams) 2-1, 2-2 forming a sharp notch (null) N is fabricated. The echo signal and a transmission wave are subjected to operation processing on the basis of the reference function while taking correlation to form two main beams 2-1, 2-2 for synthesizing the sharp notch N equivalently. If there is an object in the notch direction, the image of the object is erased from an image and, therefore, the azimuth angle of the object is determined from this phenomenon. |
