Validation of equatorial electrojet derived from Swarm observations using ground based magnetometers.
In: Advances in Space Research, Jg. 71 (2023-04-15), Heft 8, S. 3346-3356
academicJournal
Zugriff:
This paper presents the analysis of the Equatorial electrojet (EEJ S) and Counter equatorial electrojet (CEJ S) at quiet times (Kp ⩽ 3) deduced from the absolute scalar magnetometers (ASM) of the Swarm satellites. The EEJ S and CEJ S were compared with their corresponding values, EEJ G and CEJ G respectively, from ground magnetometers in the South American, West African, and Asian sectors during the years 2014–2018. The results show that EEJ S highly correlated with EEJ G , over South American, West African and Asian sectors with correlation coefficients of 0.91, 0.77 and 0.92 respectively. CEJ S with CEJ G also showed a reasonably good correlation of 0.78, 0.98 and 0.83 over South American, West African and Asian sectors respectively. For the first time, the Swarm observations of CEJ and EEJ are validated against CEJ and EEJ from ground magnetometers, over South America, West Africa and Asia. Both the occurrence rates of CEJ S and CEJ G show similar diurnal and seasonal trends, with the highest occurrence rates in the morning (7:00–9:00 LT) and evening (15:00–19:00 LT) times and the lowest occurrence rates around noon (11:00 to 12:00 LT) time. The seasonal occurrence rates of CEJ S and CEJ G were high in the solstice months and the lowest rates were during equinox months for all the sectors. The longitudinal variability of CEJ S and CEJ G show highest occurrence rates in the West African sector and the lowest occurrence rates in the Asian sector. This longitudinal variability of CEJ S and CEJ G occurrence rates were attributed to the effect of the non-migrating tides, migrating tides and stationary planetary waves. The annual occurrence rates of CEJ S and CEJ G seemed anti-correlated with F10.7. [ABSTRACT FROM AUTHOR]
Titel: |
Validation of equatorial electrojet derived from Swarm observations using ground based magnetometers.
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Autor/in / Beteiligte Person: | Ayebare, Daphine ; Andima, Geoffrey ; Mungufeni, Patrick ; Jurua, Edward |
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Zeitschrift: | Advances in Space Research, Jg. 71 (2023-04-15), Heft 8, S. 3346-3356 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0273-1177 (print) |
DOI: | 10.1016/j.asr.2022.12.002 |
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