机载条带SAR图像无参考点定位技术

机载合成孔径雷达（SAR）图像无参考点定位技术广泛应用于导航、制导和火控等领域。文中考虑条带SAR成像模式，将成像场景假定为水平面，推导了基于非线性频调变标（NCS）算法和距离多普勒（RD）算法的图像无参考点定位公式体系，分析了多普勒参数估计误差、斜距及载机高度测量误差对定位精度的影响；通过计算机仿真验证该无参考点定位方法的可行性，同时给出了有用的结论。

Locating Method of Airborne Strip-Map SAR Image Without Reference Points

Locating method of airborne synthetic aperture radar（SAR） is being widely used in navigation, control and guide, missile control and so on. As to airborne SAR strip-map mode, the imaging scene is considered to be horizontal, formulas are deduced for locating without reference points of pixels in SAR image, which are derived from non-linear chirp scaling（NCS） algorithm or range Doppler（RD） algorithm. The effects on location precision caused by Doppler parameter estimation errors, range and height measurement errors are studied. By simulation, the feasibility of the locating method is proved and some useful conclusions are given.