F2 layer characteristics and electrojet strength over an equatorial station

Adebesin, B.O. and Adeniyi, J.O. and Adimula, I.A. and Reinisch, B.W. and Yumoto, K. (2013) F2 layer characteristics and electrojet strength over an equatorial station. Advances in Space Research, 52 (5). pp. 791-800. ISSN 02731177

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Official URL: http://dx.doi.org/10.1016/j.asr.2013.05.025

Abstract

The data presented in this work describes the diurnal and seasonal variation in hmF2, NmF2, and the electrojet current strength over an African equatorial station during a period of low solar activity. The F2 region horizontal magnetic element H revealed that the Solar quiet Sq(H) daily variation rises from early morning period to maximum around local noon and falls to lower values towards evening. The F2 ionospheric current responsible for the magnetic field variations is inferred to build up at the early morning hours, attaining maximum strength around 1200 LT. The Sq variation across the entire months was higher during the daytime than nighttime. This is ascribed to the variability of the ionospheric parameters like conductivity and winds structure in this region. Seasonal daytime electrojet (EEJ) current strength for June solstice, March and September equinoxes respectively had peak values ranging within 27 – 35 nT (at 1400 LT) , 30 – 40 nT (at 1200 LT) and 35 – 45 nT (at 1500 LT). The different peak periods of the EEJ strength were attributed to the combined effects of the peak electron density and electric field. Lastly, the EEJ strength was observed to be higher during the equinoxes than the solstice period.

Item Type: Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Depositing User: DR. B. OLUFEMI ADEBESIN
Date Deposited: 12 Jun 2015 20:28
Last Modified: 12 Jun 2015 20:28
URI: http://eprints.lmu.edu.ng/id/eprint/234

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