面向无控与有控地形测绘的陆探一号基线校正方法  

Baseline correction method of Lutan-1 for topographic mapping with and without control

作　　者：李培桢 谢志鹏 李涛 张祥 LI Peizhen;XIE Zhipeng;LI Tao;ZHANG Xiang(School of Geosciences and Info-Physics,Central South University,Changsha 410083,China;Hunan Province Geological Disaster Survey and Monitoring Institute,Changsha 410011,China;Land Satellite Remote Sensing Application Center,Ministry of Natural Resources,Beijing 100048,China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]湖南省地质灾害调查监测所,湖南长沙410011 [3]自然资源部国土卫星遥感应用中心,北京100048

出　　处：《测绘通报》2024年第8期48-53,共6页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金重点项目(42330112)。

摘　　要：干涉合成孔径雷达(InSAR)生成数字地表模型(DSM)的过程中,厘米级的基线误差会带来米级的高程误差。本文面向国产陆探一号地形测绘任务,提出了一种基于远近波位基线检校的无控InSAR DSM生成方法。该方法使用远近波位检校场获取精确的基线参数改正量,并将检校参数用于其他区域,高程中误差降低了0.98 m,同时与传统的控制点辅助下的基线估计方法进行了对比分析。结果表明,控制点辅助下的基线精估计方法获取的基线估计量不适用于其余影像,而本文方法可稳健地用于长时间大区域的高精度DSM产品生产,为我国的InSAR地形测绘任务提供技术支撑。In the process of generating digital surface models(DSM)using interferometric synthetic aperture radar(InSAR),centimeter level baseline error will lead to meter level height error.For the Lutan-1(LT-1)topography mapping mission,an InSAR DSM generation method without control based on far and near beams baseline calibration is proposed in this article.This method obtain accurate baseline correction parameter with calibration sites,and applies the baseline correction parameter to other LT-1 bistatic data in Datong,reducing the mean square error of height by 0.98 m.Meanwhile,we compare and analyze this method with traditional baseline estimation methods assisted by control points.The results show that the baseline correction parameter obtained by baseline estimation method assisted by control points is not applicable to other LT-1 data,while the method in this paper can be robustly used for high-precision DSM generation in long-term and large areas,providing technical support for InSAR topography mapping mission.

关 键 词：合成孔径雷达干涉测量 陆探一号 数字地表模型 基线估计 基线检校 

分 类 号：P237[天文地球—摄影测量与遥感]