THE EQUATORIAL IONOSPHERE ELECTRODYNAMICS AND E x B DRIFT VELOCITY ESTIMATION FROM GROUND BASED MAGNETOMETER MEASUREMENTS

Mulubrhan, Tesfa kiross

dc.contributor.author	Mulubrhan, Tesfa kiross
dc.date.accessioned	2017-08-04T09:26:25Z
dc.date.available	2017-08-04T09:26:25Z
dc.date.issued	2017-08-04
dc.identifier.uri	http://hdl.handle.net/123456789/7622
dc.description	A GRADUATE PROJECT SUBMITTED TO THE SCHOOL OF GRADUATE STUDIES OF BAHIR DAR UNIVERSITY 061 IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN PHYSICS	en_US
dc.description.abstract	The daytime vertical E x B drift velocity plays a significant role on equatorial iono sphere processes such as formation of equatorial ionization anomaly. The equatorial regi~n ionosphere, which exhibits very dynamic processes, has been less studied due to lack of enough ionospheric monitoring instruments. Studies have been done on de veloping climatological models to represent the global equatorial region plasma drift velocity using ground and/or space based observations. The climatological empirical ExB drift velocity model has been developed using limited Radar and Magnetometer measurements taken in Peruvian sector. This model has not yet been validated in detail using recently installed magnetometers data taken in East-African region. In addition, it is well known that such empirical model can only mimic the long time trend of the data but not the physics behind. Therefore, in this thesis new technique that can be used to estimate the ExB drift velocity and E region E-field using physics based model derived from Ampere's and Ohm's Law has been described. The differ ence of the daytime horizontal components of the geomagnetic field obtained (on quiet days) from two magnetometers installed near 0° latitude and 6° latitude off the mag netic equator in East-African sector has been used as input to the physics based and empirical models to reproduce drift velocity observed by C/NOFS (Communication / Navigation Outage Forecast System) satellite while it passes over the East-African region. In addition the performances of the other E x B drift velocity (IRI) and E '" region E-field empirical models have been examined by running the models at the time and the position where we have measurements taken in the East-African sector. We have found out that the drift velocity estimated using physics based model shows	en_US
dc.subject	PHYSICS	en_US
dc.title	THE EQUATORIAL IONOSPHERE ELECTRODYNAMICS AND E x B DRIFT VELOCITY ESTIMATION FROM GROUND BASED MAGNETOMETER MEASUREMENTS	en_US
dc.type	Thesis	en_US