Kriging-based ionospheric TEC, ROTI and amplitude scintillation index (S4) maps for India

被引：15

作者：

Babu Sree Harsha, Pasumarthi ^{[1
]}

Venkata Ratnam, Devanaboyina ^{[1
]}

Lavanya Nagasri, Mutyala ^{[1
]}

Sridhar, Miriyala ^{[1
]}

Padma Raju, Koppireddi ^{[2
]}

机构：

[1] Koneru Lakshmaiah Educ Fdn, Dept Elect & Commun Engn, Green Fields, Guntur, Andhra Pradesh, India

[2] Jawaharlal Nehru Technol Univ Kakinada, Dept Elect & Commun Engn, Kakinada, India

来源：

IET RADAR SONAR AND NAVIGATION | 2020年 / 14卷 / 11期

关键词：

ionospheric techniques; Global Positioning System; magnetic storms; electron density; ionospheric disturbances; total electron content (atmosphere); ionospheric electromagnetic wave propagation; ionosphere; radiowave propagation; statistical analysis; TEC index; amplitude scintillation index maps; S4; dual-frequency global positioning system receivers; kriging method; linear unbiased spatial data estimates; one-minute spatial TEC maps; Indian region; regional ionospheric TEC maps; TEC strength; ROTI maps; regional ionospheric total electron content; St; Patrick's storm; plasma bubbles; geomagnetic storm; GPS aided geo-stationary earth orbit augmented navigation programme; semivariogram values; PATRICKS DAY STORM; LATITUDINAL EXTENSION; MAPPING TECHNIQUE; VTEC MAPS; GPS; EQUATORIAL; IMPROVEMENT; NETWORKS; MODELS; SYSTEM;

D O I：

10.1049/iet-rsn.2020.0202

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 degrees E geographic longitudes, 5-40 degrees N geographic latitudes with 2 degrees x 2 degrees 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.

引用

页码：1827 / 1836

页数：10

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