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测绘学报  2015 

POS与DEM辅助机载SAR多普勒参数估计

DOI: 10.11947/j.AGCS.2015.20140135, PP. 510-517

Keywords: 多普勒参数估计,机载SAR,矢量法,距离-共面方程,POS,DEM

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Abstract:

由于机载SAR多普勒参数受载机不稳定飞行和复杂地形影响明显,目前仍缺少有效的矢量估计法。本文对POS和DEM数据及其误差对机载多普勒参数的影响进行了分析,以距离-共面方程构建的SAR几何关系为基础,在POS和DEM数据支持下,建立了一种多普勒参数矢量估计法,并通过仿真对提出的方法进行了验证和分析。理论和仿真表明,本文方法在高山地形、不稳飞行及大斜视角等复杂条件下,亦能够为机载SAR瞬时多普勒中心提供高精度估计。

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