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Preprints
https://doi.org/10.5194/egusphere-2024-3021
https://doi.org/10.5194/egusphere-2024-3021
27 Sep 2024
 | 27 Sep 2024

Global long-term trends in the total electron content

Jaroslav Urbář and Jan Laštovička

Abstract. The total electron content (TEC) is an important parameter for the ionospheric dynamics, GNSS/GPS signal propagation and related applications of GNSS/GPS signals. Despite this fact the long-term trends in TEC have been studied a little only. Here we analyze the homogeneous series JPL-35 of global TEC data for 1994–2014 for selection of the optimum solar activity proxy for TEC analyses, and the UPC TEC data over 2003–2023 for estimating long-term trends in TEC. TEC trends are very predominantly negative. TEC trends reveal a clear wavenumber 2 longitudinal structure in low/equatorial latitudes with strong negative trends in belts 0–60° E and 180–240° E and weak trends in 90–150° E and 270–330° E. For more detailed information on TEC trends a longer series of reliable TEC data is required.

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Journal article(s) based on this preprint

15 Jan 2025
Global long-term trends in the total electron content
Jaroslav Urbář and Jan Laštovička
Ann. Geophys., 43, 67–72, https://doi.org/10.5194/angeo-43-67-2025,https://doi.org/10.5194/angeo-43-67-2025, 2025
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The total electron content (TEC), GNSS/GPS signal propagation and applications of GNSS/GPS...
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