The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points
In this work, we investigate the possible effects of geomagnetic activity on the ionospheric critical frequencies (foF2) in geomagnetic conjugate points. For this purpose, hourly foF2 data measured for the year 1976 from the ionosonde stations Akita, St. John's and Resolute Bay in the Northern...
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Elsevıer scı ltd, the boulevard, langford lane, kıdlıngton, oxford ox5 1gb, oxon, england
2018
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Online Access: | http://hdl.handle.net/11616/13008 |
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ftinonuuniv:oai:abakus.inonu.edu.tr:11616/13008 2023-05-15T18:06:51+02:00 The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points Ünal, İbrahim İnönü Üniversitesi 2018 application/pdf http://hdl.handle.net/11616/13008 eng eng Elsevıer scı ltd, the boulevard, langford lane, kıdlıngton, oxford ox5 1gb, oxon, england 10.1016/j.asr.2018.05.035 Advances ın space research Ünal, İ. (2018). The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points. Cilt:62 Sayı:4, 821-828 ss. http://hdl.handle.net/11616/13008 62 4 821 828 info:eu-repo/semantics/openAccess Fıeld-Alıgned Currents F-Regıon Neutral Wınds Model Hemıspheres Contours Auroras Areas Maps article 2018 ftinonuuniv 2022-03-28T19:54:52Z In this work, we investigate the possible effects of geomagnetic activity on the ionospheric critical frequencies (foF2) in geomagnetic conjugate points. For this purpose, hourly foF2 data measured for the year 1976 from the ionosonde stations Akita, St. John's and Resolute Bay in the Northern hemisphere and their corresponding magnetic conjugate ionosonde stations Brisbane, Halley Bay and Scott Base in the Southern hemisphere are examined. Planetary geomagnetic activity "3h-K-p" indices are used as a geomagnetic activity indicator. foF2 data in the magnetic conjugate points (MCP) are investigated by using a superposed epoch analysis method. This analysis is done depending on the response of foF2 to geomagnetic activity variations in MCP based on geomagnetic stormy days around equinoxes (March 21, September 23) and solstices (June 21, December 21), and the results obtained from these MCP are compared. From these results, it is found that foF2 values in magnetic conjugate pairs give similar reactions to geomagnetic activity variations simultaneously, although this relationship differs according to the seasons and magnetic latitudes of the stations. (C) 2018 COSPAR. Published by Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Resolute Bay Unknown Brisbane ENVELOPE(-45.633,-45.633,-60.600,-60.600) Resolute Bay ENVELOPE(-94.842,-94.842,74.677,74.677) Scott Base ENVELOPE(166.766,166.766,-77.849,-77.849) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftinonuuniv |
language |
English |
topic |
Fıeld-Alıgned Currents F-Regıon Neutral Wınds Model Hemıspheres Contours Auroras Areas Maps |
spellingShingle |
Fıeld-Alıgned Currents F-Regıon Neutral Wınds Model Hemıspheres Contours Auroras Areas Maps Ünal, İbrahim The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points |
topic_facet |
Fıeld-Alıgned Currents F-Regıon Neutral Wınds Model Hemıspheres Contours Auroras Areas Maps |
description |
In this work, we investigate the possible effects of geomagnetic activity on the ionospheric critical frequencies (foF2) in geomagnetic conjugate points. For this purpose, hourly foF2 data measured for the year 1976 from the ionosonde stations Akita, St. John's and Resolute Bay in the Northern hemisphere and their corresponding magnetic conjugate ionosonde stations Brisbane, Halley Bay and Scott Base in the Southern hemisphere are examined. Planetary geomagnetic activity "3h-K-p" indices are used as a geomagnetic activity indicator. foF2 data in the magnetic conjugate points (MCP) are investigated by using a superposed epoch analysis method. This analysis is done depending on the response of foF2 to geomagnetic activity variations in MCP based on geomagnetic stormy days around equinoxes (March 21, September 23) and solstices (June 21, December 21), and the results obtained from these MCP are compared. From these results, it is found that foF2 values in magnetic conjugate pairs give similar reactions to geomagnetic activity variations simultaneously, although this relationship differs according to the seasons and magnetic latitudes of the stations. (C) 2018 COSPAR. Published by Elsevier Ltd. All rights reserved. |
author2 |
İnönü Üniversitesi |
format |
Article in Journal/Newspaper |
author |
Ünal, İbrahim |
author_facet |
Ünal, İbrahim |
author_sort |
Ünal, İbrahim |
title |
The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points |
title_short |
The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points |
title_full |
The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points |
title_fullStr |
The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points |
title_full_unstemmed |
The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points |
title_sort |
effect of geomagnetic activity changes on the ionospheric critical frequencies (fof2) at magnetic conjugate points |
publisher |
Elsevıer scı ltd, the boulevard, langford lane, kıdlıngton, oxford ox5 1gb, oxon, england |
publishDate |
2018 |
url |
http://hdl.handle.net/11616/13008 |
long_lat |
ENVELOPE(-45.633,-45.633,-60.600,-60.600) ENVELOPE(-94.842,-94.842,74.677,74.677) ENVELOPE(166.766,166.766,-77.849,-77.849) |
geographic |
Brisbane Resolute Bay Scott Base |
geographic_facet |
Brisbane Resolute Bay Scott Base |
genre |
Resolute Bay |
genre_facet |
Resolute Bay |
op_relation |
10.1016/j.asr.2018.05.035 Advances ın space research Ünal, İ. (2018). The effect of geomagnetic activity changes on the ionospheric critical frequencies (foF2) at magnetic conjugate points. Cilt:62 Sayı:4, 821-828 ss. http://hdl.handle.net/11616/13008 62 4 821 828 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766178558591369216 |