Extreme Low-Latitude Total Electron Content Enhancement and Global Positioning System Scintillation at Dawn

被引：7
|
作者：
Mrak, Sebastijan [1 ,2 ]
Semeter, Joshua [1 ,2 ]
Nishimura, Yukitoshi [1 ,2 ]
Coster, Anthea J. [3 ]
机构：
[1] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
[2] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA
[3] MIT, Haystack Observ, Westford, MA 01886 USA
来源：
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS | 2021年 / 19卷 / 09期
基金：
美国国家科学基金会;
关键词：
equatorial ionization anomaly; equatorial plasma bubbles; geomagnetic storm; GPS scintillations; ionospheric space weather; IONOSPHERIC SCINTILLATION; PLASMA BUBBLES; EQUATORIAL; STORM; IRREGULARITIES; VELOCITY; MAXIMUM; RADAR;
D O I：
10.1029/2021SW002740
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on an extreme ionospheric plasma density enhancement and Global Positioning System (GPS) scintillation at dawn, observed within the expanding equatorial ionization anomaly (EIA). The total electron content (TEC) in central America reached 50 TECu at sunrise, the value almost twice as high as the normal afternoon peak. The enhanced EIA expanded poleward and westward from just below 20 degrees magnetic latitude (MLAT) to beyond 30 degrees MLAT at sunrise. The chief ramification of the enhanced EIA was strong GPS scintillation which was observed poleward of 30 degrees northern MLAT and lasted until 8:00 local time. In total, the amplitude scintillation and phase fluctuations lasted for similar to 5 h at latitudes north of 20 degrees MLAT in central America.
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页数：12
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