顾及粗差影响的全球电离层克里金插值及精度分析  

Global ionospheric Kriging interpolation and precision analysis by considering gross error

作　　者：朱永兴[1,2,3] 谭述森 杜兰 贾小林[2,3] ZHU Yongxing;TAN Shusen;DU Lan;JIA Xiaolin(Information Engineering University,Zhengzhou 450052,China;Xi’an Research Institute of Surveying and Mapping,Xi’an 710054,China;State Key Laboratory of Geo-information Engineering,Xi’an 710054,China;Beijing Satellite Navigation Center,Beijing 100094,China)

机构地区：[1]信息工程大学,河南郑州450052 [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]北京卫星导航中心,北京100094

出　　处：《测绘学报》2019年第7期840-848,共9页Acta Geodaetica et Cartographica Sinica

基　　金：国家重点研发计划(2016YFB0501900);国家自然科学基金(41574013;41604024;41674012;41704035;41874041)~~

摘　　要：针对克里格电离层插值方法受粗差数据影响和全球适用性问题,基于克里金插值的变异函数,构造电离层插值的粗差剔除统计量,实现插值过程自动化粗差剔除。采用全球电离层总电子含量格网产品进行试验验证,得出以下结论:①粗差剔除统计量能有效剔除粗差,保证插值精度与样本精度相当;②基于2014年太阳活动高年样本,克里金插值的精度RMS为1.0~5.0 TECU(total electron content unit)。The Kriging interpolation is affected by the gross error data and its global applicability is unknown for ionospheric data.Based on the variation function,the gross error elimination statistics of the TEC is created for automatic gross error elimination.Using the global ionosphere TEC grid products,the analysis results show that:① The gross error can be eliminated effectively,and the interpolation accuracy is equivalent to the sample accuracy.② The accuracy of Kriging global interpolation is 1.0~5.0 TECU at different latitude regions,different times.

关 键 词：克里金插值 总电子含量 全球插值 粗差剔除 精度分析 

分 类 号：P228[天文地球—大地测量学与测量工程]