Subauroral TEC Enhancement, GNSS Scintillation, and Positioning Error During STEVE

IF 2.6 2区 地球科学 Q2 ASTRONOMY & ASTROPHYSICS Journal of Geophysical Research: Space Physics Pub Date : 2024-12-21 DOI:10.1029/2024JA033345
R. H. Chen, Y. Nishimura, W. Liao, J. L. Semeter, M. D. Zettergren, E. F. Donovan, V. Angelopoulos
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引用次数: 0

Abstract

We report the first simultaneous observations of total electron content (TEC), radio signal scintillation, and precise point positioning (PPP) variation associated with Strong Thermal Emission Velocity Enhancement (STEVE) emissions during a 26 March 2008 storm-time substorm. Despite that the mid-latitude trough TEC decreases during the substorm overall, interestingly, we found an unexpected TEC enhancement (by ∼2 TECU) during STEVE. Enhancement of vertical TEC and phase scintillation was highly localized to STEVE within a thin latitudinal band of 1°. As STEVE shifted equatorward, TEC enhancement was found at and slightly poleward of the optical emission. PPP exhibited enhanced variation across a 3° latitudinal range around STEVE and indicated increased GNSS positioning error. We suggest that TEC enhancement during STEVE creates local TEC structures in the ionosphere that degrade Global Navigation Satellite Systems (GNSS) signals and PPP performance. The TEC enhancement may be created by particle precipitation, Pedersen drift across STEVE, neutral wind, or plasma instability.

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STEVE 期间的副金牛座 TEC 增强、GNSS 闪烁和定位误差
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来源期刊
Journal of Geophysical Research: Space Physics
Journal of Geophysical Research: Space Physics Earth and Planetary Sciences-Geophysics
CiteScore
5.30
自引率
35.70%
发文量
570
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