星载合成孔径雷达(SAR)通常利用星历表和雷达回波数据的距离-多普勒参数来实现对目标的定位。其优点是,不需要在雷达视场中使用任何位置确知的参考点,并且与卫星的姿态数据无关。在已经导出的目标定位公式的基础上,用解析法导出了计算定位误差的完整公式,并对定位误差的来源进行了详细讨论,还介绍了定位精度的评估方法,弥补了现有文献的缺陷。 Spaceborne Synthetic Aperture Radar (SAR) usually uses the distance-Doppler parameters of ephemeris and radar echo data to locate the target. The advantage is that there is no need to use any position-aware reference point in the radar field of view and is independent of the satellite’s attitude data. Based on the derived target positioning formulas, a complete formula for calculating the positioning error is derived by analytic method. The sources of positioning error are discussed in detail. The evaluation method of positioning accuracy is also introduced to make up for the deficiencies in the existing literature .