基于InSAR的三维地形匹配导航技术的研究与实现

Implementation of 3-D terrain matching navigation technology based on InSAR data

摘要:

研究了一种以干涉合成孔径雷达(InSAR)信息为基础的三维地形匹配导航系统，该系统采用基于3-D Zernike矩的三维地形匹配算法，同时针对3-D Zernike矩在地形匹配中计算实时性差的问题进行了改进。为验证系统的有效性和算法性能，搭建了基于VC++和OpenSceneGraph的三维可视化软件仿真平台。仿真结果表明，基于3-D Zernike矩的三维地形匹配算法定位精确度高，对地形的适应能力强，算法的实时性问题得到了良好解决，系统具有较高的工程实用价值。

Abstract:

A 3-D terrain matching navigation system based on Interferometric Synthetic Aperture Radar(InSAR) information is proposed, wherein the system employs a 3-D terrain matching algorithm based on 3-D Zernike moments. A new method for solving the problem of huge computation of 3-D Zernike moments in use of terrain matching and the problem of rotation adaptability is provided. In order to verify the effectiveness and the performances of the algorithm, a 3-D visual software simulation platform based on C++ and OpenSceneGraph(OSG) is constructed. Simulation results show that the 3-D terrain matching algorithm based on 3-D Zernike moments is high in positioning precision and strong in terrain adaptability, problems of real-time performance are well solved, and high practical value in engineering is obtained by the system.