多GNSS电离层TEC提取精度评估新方法  

A New Method of Evaluating the Ionospheric TEC Extraction Accuracy for Mutil-GNSS

作　　者：朱永兴[1,2,3] 周岩 李鼎 贾小林[2,3] ZHU Yongxing;ZHOU Yan;LI Ding;JIA Xiaolin(Information Engineering University, Zhengzhou 450001, China;Xi’an Research Institute of Surveying and Mapping, Xi’an 710054, China;State Key Laboratory of Geo-Information Engineering, Xi’an 710054, China;College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China)

机构地区：[1]信息工程大学,河南郑州450001 [2]地理信息工程国家重点实验室,陕西西安710054 [3]西安测绘研究所,陕西西安710054 [4]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《测绘科学技术学报》2019年第2期116-120,共5页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41874041)

摘　　要：分析研究了常规电离层总电子含量TEC(Total Electric Content)提取的精度评估问题。提出了基于临近穿刺点偏差和相邻天邻近历元跳变分析的综合电离层TEC提取精度评估方法;并采用MGEX和iGMAS部分测站实测数据,验证了该方法的有效性。与传统方法相比,采用该方法给出的评估结果更加细化,可用于小区域电离层的活动程度分析。The conventional methods for accuracy evaluation of ionospheric Total Electric Content(TEC) extraction are analyzed and studied in the paper. A comprehensive ionospheric TEC extraction accuracy evaluation method is proposed based on near-ionospheric pierce point deviation and adjacent epoch jump of adjacent days. The validity of the method is verified by the measured data of MGEX and iGMAS. Compared with the traditional method, the evaluation results given by this method are more detailed. It can also be used for the analysis of ionospheric activity in small areas.

关 键 词：多卫星导航系统 电离层TEC 精度评估 临近穿刺点 相邻天跳变 

分 类 号：P228[天文地球—大地测量学与测量工程]