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Equatorial Electrojet and electron density over Southeast Asian Region during moderate solar activity condition

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Title Equatorial Electrojet and electron density over Southeast Asian Region during moderate solar activity condition
 
Creator Bello, Saeed Abioye
Hamid, Nurul Shazana Abdul
Abdullah, Mardina
Yoshikawa, Akimasa
Hozumi, Kornyanat
Tsugawa, Takuya
 
Subject Ionosphere
Equatorial electrojet
Ionospheric electron density
Frequency Modulation Continuous Wave (FM-CW)
 
Description 125-131
The study presents a simultaneous variation of equatorial electrojet (EEJ) current and the ionospheric F2-layer maximum
electron density (NmF2) during geomagnetic quiet days and moderate solar conditions (solar radio flux, 𝐹10.7 􀵎 120 sfu).
The geomagnetic measurements at Kotatobang (KTB) and Langkawi (LKW) stations have been used to estimate the
magnetic daily variation in H-component and in deriving EEJ. The NmF2 data set is from Frequency Modulation
Continuous Wave (FM-CW), an analogue ionosonde located at the KTB station. The study examines both the diurnal and
seasonal variation in EEJ and the corresponding effect on the measured NmF2. The results obtained show that the derived
EEJ at LKW shows a daytime peak which coincides with the period NmF2 measurement at KTB station depleted to a
daytime low value. The role of EEJ at the LKW station correlates poorly with the NmF2 at KTB in which their correlation
coefficient (r) is in the range of 0.02 to 0.04 for equinox, summer and winter, respectively. However, an r-value of 0.33 was
observed when the whole data set for the year 2012 was considered. The poor correlation coefficient between derived EEJ
and NmF2 measured at KTB during the moderate solar condition suggest that EEJ has little or no influence on the prevailing
ionospheric condition at a low latitude station located outside the EEJ strip.
 
Date 2022-01-25T07:07:47Z
2022-01-25T07:07:47Z
2021-09
 
Type Article
 
Identifier 0975-105X (Online); 0367-8393 (Print)
http://nopr.niscair.res.in/handle/123456789/58954
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJRSP Vol.50(3) [September 2021]