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Open AccessArticle

Investigation of Daytime Total Electron Content Enhancements over the Asian-Australian Sector Observed from the Beidou Geostationary Satellite during 2016–2018

by Oluwaseyi Jimoh 1,2, Jiuhou Lei 1,3,4,* and Fuqing Huang 1,3,4
1
CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230000, China
2
Department of Physics, Adeleke University Ede, Osun P.M.B 250, Nigeria
3
Mengcheng National Geophysical Observatory, University of Science and Technology of China, Hefei 230000, China
4
CAS Center for Excellence in Comparative Planetology, University of Science and Technology of China, Hefei 230000, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(20), 3406; https://doi.org/10.3390/rs12203406
Received: 7 August 2020 / Revised: 8 October 2020 / Accepted: 13 October 2020 / Published: 16 October 2020
This study focused on the investigation of daytime positive ionospheric disturbances and the recurrence of total electron content (TEC) enhancements. TEC data derived from the Beidou geostationary satellite over the Asian-Australian sector were used to study the occurrence of TEC enhancements during 2016–2018. The occurrence of TEC enhancements under quiet geomagnetic condition was analyzed. Furthermore, the occurrence of TEC enhancements during different geomagnetic storm phases was considered to address the question that relates to the recurrence of TEC enhancements during the recovery phase of geomagnetic storms. The seasonal variation of TEC enhancements displayed equinoctial and solstitial peaks at the middle and low latitudes respectively. Besides, there was no evident systematic latitudinal dependence in the occurrence of TEC enhancements, albeit at the equatorial station, nearly no TEC enhancement was observed under Kp < 3. Meanwhile, the occurrences during the main phases of the geomagnetic storms were significantly above the TEC enhancement baselines except at HKWS. The prominence of TEC enhancements during the main phase in comparison with the initial and recovery phases could be attributed to the effects of prompt penetration electric fields and equator-ward neutral winds. Moreover, the pattern of TEC enhancements during the storm recovery indicates the effects of chemical composition changes, winds, and the possible modulation from the lower atmospheric forcing. View Full-Text
Keywords: ionospheric disturbances; TEC enhancements; geomagnetic activity; recovery phase; recurrence ionospheric disturbances; TEC enhancements; geomagnetic activity; recovery phase; recurrence
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MDPI and ACS Style

Jimoh, O.; Lei, J.; Huang, F. Investigation of Daytime Total Electron Content Enhancements over the Asian-Australian Sector Observed from the Beidou Geostationary Satellite during 2016–2018. Remote Sens. 2020, 12, 3406.

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