Global long-term trends in the total electron content
<p>Total electron content (TEC) is an important parameter for ionospheric dynamics, global navigation satellite system/Global Positioning System (GNSS/GPS) signal propagation and related applications of GNSS/GPS signals. Despite this fact, the long-term trends in TEC have been studied only a l...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2025-01-01
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| Series: | Annales Geophysicae |
| Online Access: | https://angeo.copernicus.org/articles/43/67/2025/angeo-43-67-2025.pdf |
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| author | J. Urbář J. Laštovička |
| author_facet | J. Urbář J. Laštovička |
| author_sort | J. Urbář |
| collection | DOAJ |
| description | <p>Total electron content (TEC) is an important parameter for ionospheric dynamics, global navigation satellite system/Global Positioning System (GNSS/GPS) signal propagation and related applications of GNSS/GPS signals. Despite this fact, the long-term trends in TEC have been studied only a little. Here, we analyze the JPL-35 (Jet Propulsion Laboratory-35) homogeneous series of global TEC data for 1994–2014 for selection of the optimum solar activity proxy for TEC analyses and the UPC (Universitat Politècnica de Catalunya) TEC data over 2003–2023 for estimating long-term trends in TEC. TEC trends are predominantly negative. TEC trends reveal a clear wavenumber 2 longitudinal structure in low/equatorial latitudes with strong negative trends in belts 0–60 and 180–240° E and weak trends in 90–150 and 270–330° E. For more detailed information on TEC trends, a longer series of reliable TEC data is required.</p> |
| format | Article |
| id | doaj-art-1ba9cf27f073455a9c898c6a4ac30950 |
| institution | Kabale University |
| issn | 0992-7689 1432-0576 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj-art-1ba9cf27f073455a9c898c6a4ac309502025-01-15T12:47:19ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762025-01-0143677210.5194/angeo-43-67-2025Global long-term trends in the total electron contentJ. Urbář0J. Laštovička1Institute of Atmospheric Physics, Czech Academy of Sciences, Boční II 1401, 14100 Prague, Czech RepublicInstitute of Atmospheric Physics, Czech Academy of Sciences, Boční II 1401, 14100 Prague, Czech Republic<p>Total electron content (TEC) is an important parameter for ionospheric dynamics, global navigation satellite system/Global Positioning System (GNSS/GPS) signal propagation and related applications of GNSS/GPS signals. Despite this fact, the long-term trends in TEC have been studied only a little. Here, we analyze the JPL-35 (Jet Propulsion Laboratory-35) homogeneous series of global TEC data for 1994–2014 for selection of the optimum solar activity proxy for TEC analyses and the UPC (Universitat Politècnica de Catalunya) TEC data over 2003–2023 for estimating long-term trends in TEC. TEC trends are predominantly negative. TEC trends reveal a clear wavenumber 2 longitudinal structure in low/equatorial latitudes with strong negative trends in belts 0–60 and 180–240° E and weak trends in 90–150 and 270–330° E. For more detailed information on TEC trends, a longer series of reliable TEC data is required.</p>https://angeo.copernicus.org/articles/43/67/2025/angeo-43-67-2025.pdf |
| spellingShingle | J. Urbář J. Laštovička Global long-term trends in the total electron content Annales Geophysicae |
| title | Global long-term trends in the total electron content |
| title_full | Global long-term trends in the total electron content |
| title_fullStr | Global long-term trends in the total electron content |
| title_full_unstemmed | Global long-term trends in the total electron content |
| title_short | Global long-term trends in the total electron content |
| title_sort | global long term trends in the total electron content |
| url | https://angeo.copernicus.org/articles/43/67/2025/angeo-43-67-2025.pdf |
| work_keys_str_mv | AT jurbar globallongtermtrendsinthetotalelectroncontent AT jlastovicka globallongtermtrendsinthetotalelectroncontent |