地磁日变数据确定中顾及纬度和经度方向影响的双因子定权方法  

Bifactor Weight Determination Method Considering the Influence of Latitude and Longitude in the Calculation of Diurnal Variation of Geomagnetic Data

作　　者：刘晓刚 徐婧林[1,3] 张素琴 管斌[1,2] LIU Xiaogang;XU Jinglin;ZHANG Suqin;GUAN Bin(State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China;Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;Northwestern Polytechnical University,Xi'an 710072,China;Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

机构地区：[1]地理信息工程国家重点实验室,陕西西安710054 [2]西安测绘研究所,陕西西安710054 [3]西北工业大学,陕西西安710072 [4]中国地震局地球物理研究所,北京100081

出　　处：《武汉大学学报（信息科学版）》2020年第10期1547-1554,共8页Geomatics and Information Science of Wuhan University

基　　金：国家重点研发计划(2018YFC1503806);国家自然科学基金(41774018);西北工业大学博士论文创新基金(CX201814);地理信息工程国家重点实验室开放研究基金(SKLGIE2017-Z-3-2)。

摘　　要：首先分析了地磁日变数据确定时传统使用的基于台站间纬度差和距离定权方法存在的缺陷;然后根据地磁场与纬度变化关系密切这一特点,提出了顾及纬度和经度方向影响的双因子定权的地磁日变数据确定方法;最后利用Intermagnet网站提供的地磁台站测量数据对所提方法的有效性进行了验证。与传统使用的距离定权法和纬度差定权法处理精度相比较,所提出的双因子定权方法具有更大的优势,为地磁日变数据的确定提供了一种新的更优的方法,在卫星、航空和海洋磁测数据的日变改正中将有较好的应用前景。The deficiencies of reverse distance weighting method and reverse latitude difference weighting method traditionally used in the calculation of diurnal variation of geomagnetic data are analyzed. According to the characteristics that the geomagnetic field has affinity with the changing of latitude, and considering the influence of latitude and longitude in the calculation of diurnal variation of geomagnetic data, the bifactor weight determination method is proposed. The validity of the proposed method is testified using geomagnetic observatory data supplied by Intermagnet website. Compared with the reverse distance weighting method and reverse latitude difference weighting method, the new bifactor weight determination method has more superiority.Experimental result shows that the proposed method is applicable in the calculation of diurnal variation of geomagnetic data, and it may have wide application prospect in diurnal variation correction of satellite, airborne and seaborne geomagnetic measurement data.

关 键 词：航空磁力测量 地磁台站 日变改正 双因子定权 Intermagnet 

分 类 号：P228[天文地球—大地测量学与测量工程]