机载条带SAR图像绝对定位方法研究

A Method of Absolute Positioning of Air-borne Strip SAR Image

在不考虑地形起伏的情况下,基于机载条带合成孔径雷达(SAR)图像的无参考点定位,建立了机载条带SAR图像绝对定位的模型,推导了SAR图像绝对定位的公式体系,并分析了载机的高度、航向角以及载机经纬度误差对SAR图像绝对定位精度的影响.最后,结合实际机载SAR成像相关参数,验证了该绝对定位方法的正确性,并对绝对定位误差进行了分析,给出了一些有用的结论。

No terrain undulation taken into account, the model of absolute positioning for the air-borne strip mode of synthetic aperture radar （SAR） image was built, based on positioning without reference points of air-bome strip mode of SAR image, the formula system of absolute positioning of SAR image derived, and the influence of the carrier aircraft height, the heading angle and the longitude and latitude errors of the carrier on the absolute positioning of SAR image analyzed. Finally, by combining the related parameters of actual air-borne SAR imaging the correctness of the absolute positioning method was verified, the absolute positioning errors analyzed, and some useful conclusions were drawn.