青藏高原电离层TEC时空特性及其对太阳活动的响应  

Spatio-temporal Characteristics of Ionosphere TEC in the Qinghai-Xizang Plateau and Its Response to Solar Activity

作　　者：罗建勋 刘卫华 李剑锋[2] 邓力铭 周田园 姜铭 LUO Jianxun;LIU Weihua;LI Jianfeng;DENG Liming;ZHOU Tianyuan;JIANG Ming(China MCC Group Co.,Ltd.,Chengdu 610063,China;Faculty of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]中国五冶集团有限公司,四川成都610063 [2]成都信息工程大学资源环境学院,四川成都610225

出　　处：《地理空间信息》2024年第12期114-118,共5页Geospatial Information

基　　金：国家重点研发计划资助项目(2021YFB3901400);四川省科技计划资助项目(2023NSFSC0266);成都信息工程大学科研基金资助项目(KYTZ202114)。

摘　　要：近年来,我国在青藏高原地区开展一系列重大工程建设,对GNSS(global navigation satellite system)高精度位置服务提出更高的要求。本研究旨在探明青藏高原地区特有的下垫面与底层大气活动特征是否导致电离层表现出的特点。利用GNSS电离层探测技术,对2014-2020年青藏高原地区的电离层活动特征进行了分析,探究了电离层TEC(total electron content)的时空特性及其对太阳活动的响应。结果显示:青藏高原地区春季和夏季TEC总体上高于秋季和冬季,电离层TEC与太阳活动指数F10.7 p的相关系数达0.84,呈强相关性,表明青藏高原地区电离层活动受太阳活动的影响显著。与同纬度的成都地区相比,青藏高原地区的TEC在夜间、上升和下降阶段吻合较好,但在峰值区域存在显著差异,峰值TEC较成都地区高5~10 TECU。In order to investigate whether the unique characteristics of underlying surface and underlying atmospheric activity in the Qinghai-Xizang Plateau region leading to the unique ionospheric behavior,we used GNSS ionospheric detection technology to analyze the ionospheric activity in the Qinghai-Xizang Plateau region from 2014 to 2020,and explored the spatio-temporal characteristics of total electron content(TEC)in the ionosphere and its response to solar activity.The results show that the TEC in spring and summer are generally higher than that in autumn and winter.The correlation coefficient between the ionospheric TEC and the solar activity index F10.7p is 0.84,showing a strong correlation,indicating that the ionospheric activity in the Qinghai-Xizang Plateau region is significantly influenced by solar activity.Compared with Chengdu at the same latitude,the TEC in the Qinghai-Xizang Plateau region matches well in the nighttime,rising,and falling stages,but there are significant differences in the peak area,with the peak TEC being 5~10 TECU higher than in Chengdu.

关 键 词：GNSS 青藏高原 大气延迟 电离层探测 时空特性 

分 类 号：P228[天文地球—大地测量学与测量工程]