- Ground and space-based geomagnetic data were used in the investigation of the longitudinal, seasonal and lunar phase dependence of the equatorial counter electrojet (CEJ) occurrence in the Peruvian, Brazilian, African, Indian and Philippine sectors during geomagnetically quiet days from the solar cycle 24 (2008 to 2018). We found that CEJ events occur more frequently during the morning (MCEJ) than in the afternoon (ACEJ). The highest MCEJ and ACEJ occurrence rates were observed for the Brazilian sector. Distinct seasonal dependence was found for each longitudinal sector under investigation. The lunar phase dependence was determined for the first time for the Philippine sector (longitude 125 degrees E), and it was shown to be less pronounced than in the Peruvian, Brazilian and African sectors. We demonstrate that differences in CEJ rates derived from ground-based and satellite data can arise from the longitudinal separation between low-latitude and equatorial stations that are used to determine the signal and its consequent time delayGround and space-based geomagnetic data were used in the investigation of the longitudinal, seasonal and lunar phase dependence of the equatorial counter electrojet (CEJ) occurrence in the Peruvian, Brazilian, African, Indian and Philippine sectors during geomagnetically quiet days from the solar cycle 24 (2008 to 2018). We found that CEJ events occur more frequently during the morning (MCEJ) than in the afternoon (ACEJ). The highest MCEJ and ACEJ occurrence rates were observed for the Brazilian sector. Distinct seasonal dependence was found for each longitudinal sector under investigation. The lunar phase dependence was determined for the first time for the Philippine sector (longitude 125 degrees E), and it was shown to be less pronounced than in the Peruvian, Brazilian and African sectors. We demonstrate that differences in CEJ rates derived from ground-based and satellite data can arise from the longitudinal separation between low-latitude and equatorial stations that are used to determine the signal and its consequent time delay in their sunrise/sunset times at ionospheric heights.…
Metadaten| Author details: | Gabriel SoaresORCiD, Yosuke YamazakiORCiD, Jürgen MatzkaORCiDGND, Katia Pinheiro, Claudia StolleORCiDGND, Patrick AlkenORCiD, Akimasa Yoshikawa, Teiji Uozumi, Akiko Fujimoto, Atul Kulkarni |
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| DOI: | https://doi.org/10.1007/s11200-018-0286-0 |
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| ISSN: | 0039-3169 |
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| ISSN: | 1573-1626 |
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| Title of parent work (English): | Studia geophysica et geodaetica |
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| Publisher: | Springer |
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| Place of publishing: | New York |
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| Publication type: | Article |
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| Language: | English |
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| Date of first publication: | 2019/05/27 |
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| Publication year: | 2019 |
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| Release date: | 2021/03/08 |
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| Tag: | equatorial ionosphere; geomagnetic observatories; geomagnetism; satellite data |
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| Volume: | 63 |
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| Issue: | 2 |
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| Number of pages: | 16 |
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| First page: | 304 |
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| Last Page: | 319 |
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| Funding institution: | National Council for Scientific and Technological Development (CNPq/Brazil)National Council for Scientific and Technological Development (CNPq) [131585/2017-7, 309884/2016-0]; FAPERJCarlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ) [E-26/200.632/2018, E-26/202.830/2015]; CAPESCAPES [1799579]; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; DFGGerman Research Foundation (DFG) [SPP 1788] |
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| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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| DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
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| Peer review: | Referiert |
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