面向光学遥感卫星星上定位精度优化的轻量化矢量控制库技术  

Lightweight Vector Control Library Technology for Spaceborne Positioning Accuracy Optimization of Optical Remote Sensing Satellites

作　　者：李明 董杨 范大昭 纪松 宋佳璇 高定 Li Ming;Dong Yang;Fan Dazhao;Ji Song;Song Jiaxuan;Gao Ding(Institute of Geospatial Information,PLA Strategic Support Force Information Engineering University,Zhengzhou 450001,Hennan,China)

机构地区：[1]中国人民解放军战略支援部队信息工程大学地理空间信息学院,河南郑州450001

出　　处：《光学学报》2024年第6期341-352,共12页Acta Optica Sinica

基　　金：国家自然科学基金(41971427,42371459);嵩山实验室项目(221100211000-5);高分遥感测绘应用示范系统(二期)(42-Y30B04-9001-19/21)。

摘　　要：针对当前光学智能遥感卫星有限存储能力对全球控制信息的轻量化需求,提出一种面向光学遥感卫星星上定位精度优化的轻量化矢量控制库技术。首先,在地面提取完整道路网,通过道路细化、节点提取以及拓扑关系构建等处理,生成星上轻量化矢量控制库并上注卫星;其次,星上在轨提取道路结构,并利用随机游走避免道路缺失的影响,生成随机游走矢量结构;然后,引入隐马尔科夫模型,搜索对应矢量,并设计分层匹配策略以精化匹配结果,实现星上轻量化矢量控制库与随机游走矢量结构的匹配;最后,利用不同类型卫星影像进行随机游走矢量结构提取、星上矢量匹配以及定位性能分析。结果表明,所提光学遥感卫星的星上轻量化矢量控制库能够有效改善非量测光学遥感卫星定位精度,验证了其在光学智能遥感卫星中的可行性。Objective With the rapid development of optical remote sensing satellites in China,the types of satellites,imaging methods,and the number of satellites in orbit are constantly increasing.Intelligent remote sensing satellite(IRSS)and related surveying and mapping application services have become an important development direction in the field of remote sensing surveying and mapping.As a key technology,on-orbit geometric positioning is rapidly developed and has become one of the essential works for IRSS and its subsequent applications.To improve the positioning accuracy,at the same time,ground control information has to be injected into the spaceborne processing system.However,the data volume of ground control information is usually globally covered and is too huge to be directly loaded.How to lighten the ground control information,therefore,has become one of the urgent problems to be solved.The construction of an on-orbit control information library is one of the solutions.At present,most related methods are focused on the lightweight processing of control information descriptors,the performance of which is generally limited by environmental noiseaffected feature diversity.To address the problem,scholars have proposed and attempted to introduce vector line features into the methods to improve its robustness.Based on this,we propose an optical remote sensing satellite positioning technology based on the lightweight vector control library,which uses the vector topology relationship to get rid of the dependence of the control point on local image grayscale information.We believe that our spaceborne lightweight vector control library can help IRSS improve on-orbit positioning accuracy and advance the development of on-orbit automatic processing technology.Methods First,we extract and perfect the road information on the ground platform.Through a series of operations including road network refinement,node interruption,and road network topological relationship construction,the spaceborne lightweight vector control librar

关 键 词：轻量化处理 矢量控制库 星上智能处理 矢量匹配 高分辨率光学遥感卫星 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]