摘要
文章针对遥感立体测绘卫星体制选择与设计方案,结合目前测绘能力的现状,通过分析传统大基高比、小基高比以及双基高比测绘模式的优势和瓶颈,提出多基高比航天测绘模式,来适应山地建筑等不同地形条件的测绘任务。根据立体成像模型分析定位精度影响因素,构建数值模拟场景,结合解析空中三角测量方法,得到不同匹配误差与平面精度和高程精度的关系。仿真结果表明:对于不同程度的匹配误差,0.15至0.6左右的较小基高比参数适用于对平面精度要求高的地形特点,0.8左右至1.2的较大基高比适用于对高程精度要求高的地形特点,根据相应地形准确选取基高比参数能够提升定位精度。文章研究成果为指导设计提升卫星测绘能力的方案提供参考依据。
Aiming at the system selection and design scheme of remote sensing stereo mapping satellites,combined with the current status of space mapping capability,this paper proposes a multi-baseline space mapping model by analyzing the advantages and bottlenecks of the traditional large,small and double baseline aspect ratio mapping models,to adapt to the mapping tasks of different terrain conditions such as mountain buildings.According to the theoretical basis for the derivations of factors affecting positioning accuracy under the stereoscopic imaging model,a numerical simulation scene is constructed,and the relationship between different matching errors and the plane and elevation accuracy is obtained by combining the analytical aerial triangulation method.The simulation results show that for different degrees of matching errors,the smaller ratio of baseline to altitude of about 0.15 to 0.6 is generally suitable for terrain characteristics with high requirements for the plane accuracy,and the larger larger ratio of baseline to altitude of about 0.8 to 1.2 is suitable for terrain characteristics with high requirements for the elevation accuracy.Accurate selection of the ratio of baseline to altitude according to the corresponding terrain can improve the positioning accuracy.The research results of this paper provide a reference for guiding the design of satellite mapping capability improvement schemes.
作者
赵彦斌
刘洋
高爽
刘国华
尹泓昳
万志强
田龙飞
胡登辉
ZHAO Yanbin;LIU Yang;GAO Shuang;LIU Guohua;YIN Hongyi;WAN Zhiqiang;TIAN Longfei;HU Denghui(Institute of Microsatellite Innovation,Chinese Academy of Sciences,Shanghai 201203,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《航天返回与遥感》
CSCD
北大核心
2024年第2期74-82,共9页
Spacecraft Recovery & Remote Sensing
关键词
立体测绘卫星
基高比
立体成像模型
匹配误差
解析空中三角测量
stereo mapping satellite
the ratio of baseline to altitude
the stereoscopic imaging model
matching errors
analytical aerial triangulation
