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Kriging-based ionospheric TEC, ROTI and amplitude scintillation index (S4) maps for India
IET Radar Sonar and Navigation ( IF 1.4 ) Pub Date : 2020-11-02 , DOI: 10.1049/iet-rsn.2020.0202
Pasumarthi Babu Sree Harsha 1 , Devanaboyina Venkata Ratnam 1 , Mutyala Lavanya Nagasri 1 , Miriyala Sridhar 1 , Koppireddi Padma Raju 2
Affiliation  

In this study, an attempt is made to develop regional ionospheric total electron content (TEC), rate of TEC index (ROTI) and amplitude scintillation index ( S 4 ) maps using data from 26 dual-frequency global positioning system (GPS) receivers under GPS aided geo-stationary earth orbit augmented navigation programme over Indian region. One-minute spatial TEC maps are generated for the entire Indian region covering 65–100°E geographic longitudes, 5–40°N geographic latitudes with 2° × 2° grid separation using Kriging method. Also, the ROTI and amplitude scintillation index ( S 4 ) maps for every 5 min are generated. The performance of the generated regional TEC maps is evaluated during a severe geomagnetic storm condition. Patterns of equatorial ionisation anomaly (EIA) TEC structures are investigated for St. Patrick's storm between the days 15 and 20 March 2015 with the generated TEC maps. The proposed TEC maps depict the northern crest of EIA features in latitudinal extent and TEC strength. The kriging method detects the suppressed and downshift of EIA features on 18 March 2015. The movement of plasma bubbles are analysed over Indian latitudes during the transition period of a geomagnetic storm on 17 March 2015.

中文翻译:

基于Kriging的电离层TEC,ROTI和振幅闪烁指数(小号4)印度地图

在这项研究中,我们尝试开发区域电离层总电子含量(TEC),TEC指数速率(ROTI)和幅度闪烁指数( 小号 4 )在GPS辅助的地球静止地球轨道增强的导航程序下,使用来自26个双频全球定位系统(GPS)接收器的数据在印度地区进行地图绘制。使用克里格方法为整个印度地区生成一分钟的空间TEC图,该图覆盖了东经65–100°E,北纬5–40°N,地理间隔为2°×2°。此外,ROTI和振幅闪烁指数( 小号 4 )每5分钟生成一张地图。在严重的地磁风暴条件下评估生成的区域TEC图的性能。利用生成的TEC图,研究了2015年3月15日至20日之间的圣帕特里克风暴的赤道电离异常(EIA)TEC结构模式。拟议的TEC图描绘了EIA特征的北纬在纬度范围和TEC强度方面。克里金法在2015年3月18日检测到EIA特征受到抑制和降档。在2015年3月17日地磁风暴过渡期间,分析了印度洋纬度上的等离子气泡运动。
更新日期:2020-11-03
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