关键词: 双站合成孔径雷达, 雷达成像, 几何失真, 几何校正, 等效相位中心

Abstract:

The existence of the differences in squint angle and velocity between transmitter and receiver in the bistatic synthetic aperture radar(SAR) makes the imaging results distorted. This paper concerns the issue of bistatic SAR image geometric correction. According to the geometry of the bistatic SAR, the slant range history is particularly analyzed. In addition, the equivalent phase center (EPC) method is used to transform the bistatic model to a monostatic equivalent. Then, the expression of the geometric distortion correction for the bistatic SAR image is derived based on the  RD imaging algorithm. Finally, the validity of the method is demonstrated by simulation.

Key words: bistatic synthetic aperture radar(BISAR), radar imaging, geometric distortion, geometric correction, equivalent phase center(EPC)