ESTIMATING ELECTRON DENSITY OF THE IONOSPHERE FROM RADIO OCCULTATION TEC DATA USING ABEL INVERSION

Bizuayehu, Addisie Beyene

dc.contributor.author	Bizuayehu, Addisie Beyene
dc.date.accessioned	2017-08-04T03:58:55Z
dc.date.available	2017-08-04T03:58:55Z
dc.date.issued	2017-08-04
dc.identifier.uri	http://hdl.handle.net/123456789/7574
dc.description	A THESIS SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES OF BAHIR DAR UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN PHYSICS	en_US
dc.description.abstract	Ionospheric electron density affects trans-ionospheric radio waves. Estimating elec tnm density, therefore, is vital to mitigate the effect of ionosphere OIl radio waves. As a re~ult, different methods have been applied to estimate ionospheric electron den sity from integrated measurements of ground-based GPS (Global Positioning System) receivers recently installed in East-Africa. To augment such efforts, ionospheric elec tron density has been estimated from Radio Occultation (RO) total electron content (TEC) data measured by LEO (Low Earth Orbit) satellites. Abel inversion onion peeling algorithm then is used to retrieve electron density profiles from the calibrated TEC data. The reconstructed electron density profiles have been validated by run ning the standard ionospheric empirical model (International Reference Ionosphere, IRI-2007) at time and locations that RO electron density profiles are obtained. The results show well agreement between the Abel inversion and IRI-2007 electron den sity profiles, for both bottom and topside ionosphere. Also, F2 peak density heights from Abel inversion and IRI-2007 have shown well agreement. However, significant discrepancy has been detected around the height of the F2 peak density.	en_US
dc.subject	PHYSICS	en_US
dc.title	ESTIMATING ELECTRON DENSITY OF THE IONOSPHERE FROM RADIO OCCULTATION TEC DATA USING ABEL INVERSION	en_US
dc.type	Thesis	en_US