NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(5) [October 2012] >

Title: Variability of the vertical extent of ionospheric E-layer over a station within equatorial anomaly region
Authors: Rabiu, A B
Abe, O E
Adeniyi, J O
Keywords: Equatorial ionosphere anomaly
E-layer vertical extent
Low solar activity
Issue Date: Oct-2012
Publisher: NISCAIR-CSIR, India
PACS No.: 94.20.dt; 94.20.Vv; 94.20.wq
Abstract: The variability of the vertical extent of the E-layer of the ionosphere (VE) has been examined within the equatorial ionospheric anomaly region, taken as the difference between 90 km which is the assumed lower boundary of the layer and the virtual height values measured with an ionosonde at Ouagadougou in Burkina Faso, West Africa (geographic lat 12.4°N, long 1.5°W and magnetic dip 5.9°N) for low solar activity year 1985 and high solar activity year 1990. The vertical extent is a measure of the vertical altitude of E-region of the ionosphere. The vertical extent of the E-layer was observed to be high (36-40 km) at sunrise and sunset while low (18-22 km) at noon for both years. Seasonal variation shows that vertical extent of E-layer during the solar minimum (maximum) is higher in September (March) equinox and lower in March (September) equinox. The vertical extent of E-layer has been found to be an unstable membrane as it varied from hour to hour, day to day, month to month and season to season in response to the solar activity. The VE is thicker in the low solar activity (26.30 ± 3.47 km) than the high solar activity (23.01 ± 2.62 km), which implies that increase/decrease in the solar activity results in decrease/increase in vertical extent of E-layer. Precisely, 5.4% (35.9%) variation in low (high) solar activity is accounted for by the variability in solar activity while the remaining percentage may be due to other factors.
Page(s): 536-542
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-105X (Online); 0367-8393 (Print)
Source:IJRSP Vol.41(5) [October 2012]

Files in This Item:

File Description SizeFormat
IJRSP 41(5) 536-542.pdf423.11 kBAdobe PDFView/Open
 Current Page Visits: 117 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 166200 since 01-Sep-2015  Last updated on 28-Jun-2016Webmaster: