刘辉,徐青,靳国旺,张红敏

• 1:华北水利水电大学测绘与地理信息学院
• 2:信息工程大学地理空间信息学院

摘要(Abstract)：

针对单片定位时的不满秩方积求解问题,该文根据SAR图像距离投影原理,引入DEM约束条件,利用R-D模型由像点二维坐标迭代答解相应地面点三维坐标。通过SAR构像模型的几何分析,引入地面坡度角和起始高程点对应的俯角,推导了SAR图像单片定位的收敛条件和收敛速度关系式。分析得到迭代发散时的条件正好对应着SAR图像叠掩产生的条件,又进一步分析并设计了单幅SAR图像叠掩区域定位方案,从最高端给初始值,依次向下求解,通过叠掩区域的位置信息以及SAR构像模型中表示斜距条件的弧线在地面上方还是下方的判断,分别解算多个地面点坐标。利用点目标仿真数据和山区实际数据进行了实验,验证了该文方案的正确性、有效性和实用性。

关键词(KeyWords)： 单片定位;数字高程模型;收敛条件;收敛速度;叠掩

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41071296,41474010,61401509);; 河南省高等学校重点科研项目(19A420008)

作者(Author): 刘辉,徐青,靳国旺,张红敏

DOI: 10.16251/j.cnki.1009-2307.2018.10.004

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