Observations of wave activity in the ionosphere over South Africa in geomagnetically quiet and disturbed periods

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F12%3A00378870" target="_blank" >RIV/68378289:_____/12:00378870 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.asr.2012.04.016" target="_blank" >http://dx.doi.org/10.1016/j.asr.2012.04.016</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.asr.2012.04.016" target="_blank" >10.1016/j.asr.2012.04.016</a>

Result language
angličtina
Original language name
Observations of wave activity in the ionosphere over South Africa in geomagnetically quiet and disturbed periods
Original language description
The present paper deals with observations of wave activity in the period range 1?60 min at ionospheric heights over the Western Cape, South Africa from May 2010 to July 2010. The study is based on the Doppler type sounding of the ionosphere. The Dopplerfrequency shift measurements are supplemented with measurements of collocated Digisonde DPS-4D at SANSA Space Sciences, Hermanus. Nine geomagnetically quiet days and nine geomagnetically active days were included in the study. Waves of periods 4?30 min were observed during the daytime independent of the level of geomagnetic activity. Amplitudes of 10?30 min waves always increased between 14:00 and 16:15 UT (16:00?18:15 LT). Secondary maxima were observed between 06:00 and 07:00 UT (08:00?09:00 LT). Themaximum wave amplitudes occurred close to the time of passage of the solar terminator in the studied region which is known to act as a source of gravity waves. Waves of periods 30?50 min were observed in the F2 layer during the daytime on
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DG - Atmospheric sciences, meteorology
OECD FORD branch
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Project
<a href="/en/project/GAP209%2F12%2F2440" target="_blank" >GAP209/12/2440: Troposphere-ionosphere coupling and its impact on ionospheric variability</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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