机载InSAR区域网平差方法研究

项目名称： 机载InSAR区域网平差方法研究

项目编号： No.41201481

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地理学

项目作者： 岳昔娟

作者单位： 中国科学院遥感与数字地球研究所

项目金额： 25万元

中文摘要： 机载InSAR系统能够高效、高精度获取地表高程信息，机载InSAR系统及InSAR数据处理方法已成为国际SAR领域的研究热点。机载InSAR区域网平差通过建立影像之间的几何约束关系，依据最小二乘原理，调整和精化平差参数，求解加密点坐标，不仅可以减少地面控制点的数量，还能提高加密点坐标的精度和区域网整体性，实现大面积、稀少控制点条件下高精度定位。因此，利用机载InSAR高精度测图，必须进行机载InSAR区域网平差。 本项目主要研究内容：（1）研究机载InSAR区域网平差三维误差模型，进行机载InSAR区域网平差误差分析；（2）研究机载InSAR粗差探测与稳健估计方法；（3）研究机载InSAR区域网平差最优收敛条件；（4）研究大规模、非线性、高精度机载InSAR区域网平差求解方法，实现大面积、稀少控制条件下机载InSAR高精度定位。

中文关键词： 机载InSAR；区域网平差；数字高程模型；数字正射模型；精度分析

英文摘要： High-precision surface elevation information can be orbtained efficiently by airborne InSAR system. Airborne InSAR system and InSAR data processing algorithm have been one of the hot topics in the international SAR field. Geometric constraint relation of images is set up through airborne InSAR block adjustment, adjustment parameters are adjusted and refined, and the pass point coordinates are solved according to least squares theory. The number of the ground control points is reduced. The accuracy of the pass point coordinates and the integrity of the block is increased by airborne InSAR block adjustment. So high-precision positioning can be achieved in large area with few control points. Therefore block adjustment is the core of airborne InSAR mapping. Main research content in the project includes: (1)3-D error model of airborne InSAR block adjustment and error analysis of the whole process of airborne InSAR Block adjustment. (2)The method of airborne InSAR Outlier detection and robust estimation. (3)Optimal convergence condition of airborne InSAR block adjustment. (4)Large-scale, nonlinear and high-precision resolving with airborne InSAR block adjustment. Finally, high-precision posioning is realized in large area with few control points.

英文关键词： airborne InSAR；block adjustment；DEM；DOM；accuracy analysis