地方时的全球电离层格网精度评价  

Assessing the precision of global ionospheric grid at local time

作　　者：侯威震 张绍成[1] 黄龙强 殷飞 HOU Weizhen;ZHANG Shaocheng;HUANG Longqiang;YIN Fei(Faculty of Information Engineering,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质大学信息工程学院,武汉430074

出　　处：《测绘科学》2019年第1期151-156,共6页Science of Surveying and Mapping

基　　金：中央高校基本科研业务费专项资金资助项目(CUGL150839);国家自然科学青年基金项目(41504023)

摘　　要：针对IGS发布的电离层格网产品的精度(均方根)在不同区域受太阳辐射影响不同的问题,该文提出基于地方时的全球电离层格网精度分析,通过地方时能较好地分析近似太阳辐射条件下的电离层精度。研究结果显示,电离层精度明显受地面基准站分布疏密的影响,基准站密集区域均方根随太阳辐射变化的波动较小,并且在太阳辐射较高时也能很好地保证电离层产品的精度;而基准站稀疏的区域均方根随太阳活动的影响较大,电离层精度较差。According to the problem that the accuracy of ionosphere(root mean square)issued by IGS existed difference due to solar radiation in different areas,the paper put forward a new mode basing at the local time to analysis the precision of ionosphere,through local time,ionospheric accuracy in the similar solar radiation conditions could be well analysed.The results showed that the precision of ionosphere affected obviously by the distribution of ground-based stations,on the high-density ground-based stations areas,the RMS were less influenced by the solar radiation,and even in the high solar radiation it could ensure preferably the precision;the RMS had bigger variation with the solar radiation in the sparse areas,the precision of ionosphere was poor.

关 键 词：电离层 总电子含量 地方时 精度评价 

分 类 号：P228[天文地球—大地测量学与测量工程]