GNSS偏心分量反算对POS解算精度的影响分析  

Analysis of the Influence of GNSS Lever-arms Calculation on the Accuracy of POS Solution

作　　者：耿彦龙 范亚兵 罗军凯 刘勇 GENG Yanlong;FAN Yabing;LUO Junkai;LIU Yong(Xi′an Station of Surveying and Mapping,Xi′an 710054,China)

机构地区：[1]西安测绘总站,陕西西安710054

出　　处：《测绘与空间地理信息》2022年第7期205-207,211,共4页Geomatics & Spatial Information Technology

摘　　要：介绍了数字航空摄影测量偏心分量的定义,阐述了偏心分量测量方法,提出了偏心分量反算技术流程,从相对精度和绝对精度2个方面分别比较了GNSS基站、CORS站、PPP 3种不同数据源对于偏心分量反算结果的差异,并分析了不同数据源对POS解算精度的影响。试验表明,3种数据源下偏心分量反算的结果并不相同,验证了存在粗差的偏心分量测量值显著影响POS解算精度,同时利用偏心分量反算可以检查和提高POS解算精度,为航摄项目高精度POS解算提供了一种可靠的技术手段。This paper introduces the definition and the measurement method of GNSS lever-arms in digital aerial photogrammetry and puts forward the technical process of lever-arms calculation.From the aspects of relative accuracy and absolute accuracy,the differences of three different data sources,GNSS base station,CORS and PPP,are compared,and the influence of different data sources on the accuracy of POS solution is analyzed.The experiment results show that the results with GNSS lever-arms calculation are not the same under the three data sources,which verifies that the measurement value of GNSS lever-arms with gross error significantly affects the accuracy of POS solution.At the same time,it can check and improve the measurement accuracy by using GNSS lever-arms calculation,which provides a reliable technical means for high-accuracy POS solution of aerial photography projects.

关 键 词：航空摄影测量 偏心分量反算 POS系统 精度分析 

分 类 号：P231[天文地球—摄影测量与遥感]