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- SA11E-1925: Spatio-Temporal Evolution of Mid-Latitude GPS Scintillation and Position Errors During the May 2024 Solar Storm
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Board 1925‚ Hall EFG (Poster Hall)NOLA CC
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Waqar Younas, Boston University (First Author, Presenting Author)
Yukitoshi Nishimura, Boston University
Weixuan Liao, Boston University
Joshua Semeter, Boston Univ
Sebastijan Mrak, Boston University
Jade Morton, University of Colorado Boulder
Keith Groves, Boston College, Institute for Scientific Research
During the geomagnetic storm of 10–11 May 2024, Global Positioning System (GPS) users, particularly farmers in the Central United States, reported significant positioning errors and outages. This study identified the cause of the GPS outages by analyzing the data from the 1-Hz GPS receiver network. Standalone GPS position errors In PPP mode in the Central United States reached 70 m on May 10, and they were attributed to a steep wall in ionospheric plasma that rapidly moved southward. The GPS position errors were also elevated in the Southwestern United States (∼10–20 m) because of the enhanced plasma density. On May 11, intense auroral activity caused rapid enhancements in the ionospheric plasma, leading to abrupt position errors of ∼10 m. Network-based position systems likely encountered even longer duration of position errors because these ionospheric disturbances are localized. These findings highlight the need for more accurate understanding of ionospheric plasma conditions, as well as software and hardware improvements, to reduce disruptions during space weather events.
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