Applications of the CMONOC based GNSS data in monitoring and investigation of ionospheric space weather
Applications of the CMONOC based GNSS data in monitoring and investigation of ionospheric space weather
复制标题
基于CMONOC的GNSS数据在电离层空间天气监测与调查中的应用
DOI：
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发表时间：
2012
影响因子：
1.4
通讯作者：
Li Jian-Yong
中科院分区：
文献类型：
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作者：
Li Qiang;Han Yu-Fei;Ning Bai-Qi;Zhao Bi-Qiang;Ding Feng;Zhang Rui;Shi Hong-Bo;Yue Hui-Jun;Li Guo-Zhu;Li Jian-Yong
中国地壳运动观测网络（CMONOC）是以全球导航卫星系统（GNSS）为基础，以多种天基技术为补充，以实时动态监测大陆构造环境变化及其对资源、环境和灾害的影响为目的的地球科学综合观测网络。讨论了COMNOC在电离层空间天气监测和科学研究中的应用，包括电离层暴形态、大尺度行进性电离层扰动、太阳耀斑引起的突发性电离层扰动、低纬电离层不规则性等方面的研究。结果表明，在2011年5月29日的中强电离层暴过程中，电离层总电子含量（TEC）局部增强最大，约为30 TECU在华南地区，1 TECU = 1016 el/m2，最大增强在当地时间19 ∶ 00达到30 TECU，与JPL-GIM产品相比，该方法具有更好的时空分辨率。2011年5月28日15：40-16：00 UT期间，在中国中部地区观测到了一次向西的太阳耀斑。2月15日，在一次X2.2级太阳耀斑事件中，观测到了一次太阳耀斑引起的TEC（SITECs）突然增加，2011年中国大陆地区的大气总电子浓度（ΔTEC）分布与太阳天顶呈线性关系，由GPS TEC计算的闪烁指数表明，结果表明，我国南方电离层空间天气观测网分布均匀，数据质量高，可充分用于电离层空间天气的研究，并可作为空间天气临近预报技术的观测基础。
Crustal Movement Observation Network of China(CMONOC) is a comprehensive observational network in Earth sciences on the basis of global navigation satellite system(GNSS) supplemented by a variety of space-based techniques,which aims to perform real-time dynamic monitoring of changes in continental tectonic settings and explore their effect on resources,environments and disasters.Based on the GPS data from ~200 reference stations of the COMNOC,this article discusses the application of the COMNOC in the field of ionospheric space weather monitoring and scientific research,including the study on the ionospheric storm morphology,large scale travelling ionospheric disturbances,sudden ionospheric disturbance caused by the solar flare,and ionospheric irregularities at low latitudes.The results show that during the moderate storm event May 29,2011,the ionosphere recorded a maximum local enhancement of total electron content(TEC) ~30 TECU(1TECU=1016el/m2) over the southern China with maximum enhancement up to 30 TECU at 19 ∶ 00 local time,which has good spatial and temporal resolution than the results of JPL-GIM product.Passage of a large scale traveling ionospheric disturbance(LSTID) moving south-westward over the central China was observed during 15 ∶ 40—16 ∶ 00 UT on May 28,2011.A solar flare induced sudden increases in TEC(SITECs) was recorded during a solar flare event of X2.2 class on February 15,2011 over the entire China.The distribution of ΔTEC of every station shows a statistical linear relationship with the solar zenith.The scintillation index derived from the GPS TEC shows that there are irregularities distributed over southern China with a much larger area used with 200 COMNOC stations than the former 25 reference stations.The above results illustrate that the present network is well distributed with high-qualified data which can be fully used in the investigation of the ionospheric space weather,and serve as the observational basement of the space weather nowcasting and forecasting technique.