IONOSPHERIC TOTAL ELECTRON CONTENT  RESPONCES FOR SOLAR PARAMETERS (EUV and  F10.7)  OVER ETHIOPIA DURING THE YEAR 2016

SISAY, ATALEL

dc.contributor.author	SISAY, ATALEL
dc.date.accessioned	2018-11-22T09:48:56Z
dc.date.available	2018-11-22T09:48:56Z
dc.date.issued	2018-11-22
dc.identifier.uri	http://hdl.handle.net/123456789/9198
dc.description.abstract	Abstract The production and ionization of ionosphere and its dynamics is mainly controlled by the level of solar irradiances that is received by ionosphere. As a result ionospheric variability also follows a cyclic variability of solar activity indices and geomagnetic storms. In the recent studies the relationship between ionospheric parameters and solar parameters investigated by using ionsonde data at high and middle latitude. Additionally the variation of EUV and F10.7 corresponding to TEC in Ethiopian region has not been studied. Therefore in the present study we investigate the correlation between ionosphere total electrons content and solar parameters over Ethiopia get special attention. Under the present study we characterize the ionospheric variability by vertical total electron content (vTEC) using measurements made by Global Position System (GPS) deployed at Bahir Dar and Negele with geographic latitude of (11.5998 0 , 5. 3347 0 ) and geographic longitude (37.3597 0 , 39.5894 0 ) respectively, and various solar activity indices downloaded freely from owineweb data explorer. We make use of three solar activity indices i.e. EUV flux, solar radio flux (F10.7) and the KP index. The variability of solar indices were then compared and correlated with the variability of ionospheric TEC at Bahir Dar and Negele station over Ethiopia during the period of 2016. Hence the coefficient of determination has been calculated the daily mean data of vTEC and solar parameters as well as geomagnetic storm. From our study we found that changes of ionospheric TEC vary synchronously with corresponding changes in the activity indices. This work also confirms that the presences of higher coefficient correlation between vTEC solar parameters during equinox period and low during solstices period. The TEC exhibits a good association with the solar radio flux (F10.7 cm), Solar EUV flux and KP index indicating that which is more responsive to solar activity indices than geomagnetic storms. Ionospheric total electron content gives delayed responses of both EUV and solar radio flux (F10.7cm) approximately 1-2 days.	en_US
dc.language.iso	en_US	en_US
dc.subject	Physics	en_US
dc.title	IONOSPHERIC TOTAL ELECTRON CONTENT RESPONCES FOR SOLAR PARAMETERS (EUV and F10.7) OVER ETHIOPIA DURING THE YEAR 2016	en_US
dc.type	Thesis	en_US