Relationship Between Total Electron Content (TEC) and Solar Activity Indices (Fl0.7 and R) over Bahir dar during the  ... .... ""' .  year 2013.

Samson, Tilahun

dc.contributor.author	Samson, Tilahun
dc.date.accessioned	2017-08-14T05:36:13Z
dc.date.available	2017-08-14T05:36:13Z
dc.date.issued	2017-07-14
dc.identifier.uri	http://hdl.handle.net/123456789/7678
dc.description	A PROJECT SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES OF BAHIR DAR UNIVERSITY IN PARTIAL F"lJ-LFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN PHYSICS	en_US
dc.description.abstract	Estimation of ionospheric behavior ahead of sending signal to devices on Earth or on space vehicle is significantly important for making correction on the signal to be transmitted. The equatorial ionosphere is basically affected by photoionization, -t -t (E x B) drift, .:neutral wind and equatorial irregularities. However, these effects are highly dependent on th'e level of solar activity. Therefore, in the present study , - correlations of daily solar activity indices (FlO. 7 and R) with their corresponding daily mean GPS TEC deployed at Bahir dar (ll.6°N and 37.36° E), Ethiopia in the year 2013 have get special attention. Hence th.,e _coefficient of determination (r2)has been -calculated -in between the daily mean data of vTEC and solar parameters as well as in between observed vTEC and model vTEC. Moreover preparation of suitable model ~ as a function of sunspot number and Fl0.7 that can describe the actual measurement " have been employed via quadratic curve fitting. So as to produce best quadratic curve fitting, pertinent coefficients (quadratic and linear) and extrapolation points _,.. are calculated. This work confirms the presence of higher coefficient of determination in between solar activity indices and vTEC during April, May and September than June, July and August. More practically r2 is calculated as (0.69, 0.78),(0.73, 0.57) ... - ' -and (0.77, 0.75) for April, May and September as well as (0.2, 0.3), (0.41, 0.18) and (0.58, 0.46) for July, August and June in between vTEC and Fl0.7 as well as between .... vTEC and R respectively. In ac.ldition to this both saturation and amplification trend of the model vTEC versus solar activity indices were observed more frequently than linear trend of v<l'fiation across the months of the year considered . . Key words: Ionosphere; vertical TEC; solar activity indices.	en_US
dc.subject	PHYSICS	en_US
dc.title	Relationship Between Total Electron Content (TEC) and Solar Activity Indices (Fl0.7 and R) over Bahir dar during the ... .... ""' . year 2013.	en_US
dc.type	Thesis	en_US