2007-2017年山东及周边区域电离层时空特性分析  

Spatiotemporal Characteristics of Ionosphere in Shandong and Its Surrounding Area in 2007-2017

作　　者：从建锋 刘智敏[1,2] 刘盼 郭金运 CONG Jianfeng;LIU Zhinmin;LIU Pan;GUO Jinyun(Geomatics College,Shandong University of Science and Technodlogy,Qingdao 266590,China;Basic Geographie Information and Dxgital Technology Laboratory,Qingdno 266590,China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]基础地理信息与数字化技术实验室,山东青岛266590

出　　处：《测绘地理信息》2020年第6期29-34,共6页Journal of Geomatics

基　　金：国家自然科学基金(41374009);青岛博士后基金(2015186)。

摘　　要：针对电离层延迟对导航定位带来的影响,利用国际全球卫星导航系统(global navigation satellite system,GNSS)服务组织(International GNSS Service, IGS)中心提供一个太阳周期11 a的垂直总电子含量(vertical total electron content, VTEC)数据对山东及周边区域电离层进行时序分析、经纬度时空特性分析,结合太阳活动和地磁活动指数进行相关性分析。实验结果表明:山东及周边区域电离层VTEC值具有明显年周期;2007年出现春季异常现象,2012年、2014年、2015年、2016年出现冬季异常现象;单日时空特性表现为:北京时间12:00-14:00出现当天VTEC峰值,达到峰值后VTEC值急剧下降;纬度的时空特性表现为:随着纬度的增加,VTEC值明显下降,经度的时空特性无显著特征变化;太阳活动指数年均值和VTEC年均值有着较强的相关性,相关系数达到0.981 7;地磁活动活跃时,地磁指数月均值与VTEC月均值存在中度相关性,2010年、2011年、2013年相关系数分别为:-0.659 7、-0.591 3、-0.531 9。For the effect of ionospheric delay on navigation and positioning, IGS(international GNSS service) is used to provide a VTC(vertical total electron content) data of 11 a of solar cycle to carry out time series analysis of ionosphere in Shandong and its surrounding areas, analysis of spatio-temporal latitude and longitude characteristics, and combine solar activity and geomagnetic activity index for correlation analysis. The experimental results show that the ionospheric VTEC values in Shandong and surrounding areas have obvious annual cycles. In spring 2007, anomalies occurred in spring, and winter anomalies occurred in 2012, 2014, 2015, and 2016;the spatial-temporal characteristics of one day were as follows: The VTEC peak of the day occurred at 12:00-14:00 Beijing time. The temporal and spatial characteristics of latitude were as follows: With the increase of latitude, the VTEC value decreased significantly, and the temporal and spatial characteristics of longitude were not significant. The change in characteristics;the annual average value of the solar activity index and the annual mean value of VTEC has a strong correlation, and the correlation coefficient reaches 0.981 7;when the geomagnetic activity is active, the monthly mean value of the geomagnetic index has a moderate correlation with the monthly average value of VTEC, and it is related to 2010, 2011 and 2013. The coefficients are:-0.659 7,-0.591 3,-0.531 9.

关 键 词：电离层延迟 垂直电子含量 时空特性 太阳活动 地磁活动 

分 类 号：P228[天文地球—大地测量学与测量工程]