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Ibnospheric modelling in 3D over the equatorial region using IRI

Nagarajoo, Karthigesu (2012) Ibnospheric modelling in 3D over the equatorial region using IRI. In: National Physics Conference PERFIK 2012, 19-21 November 2012, Bukit Tinggi, Pahang.


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The ionospheric horizontal gradient is the variation of electron density with latitude and longitude which can cause the azimuthal deviation to the Global Positioning System (GPS) ray path. The effect of an ionospheric horizontal gradient is more pronounced in the low-latitude region (equatorial) and mid-auroral (trough) or polar regions than at mid-latitudes. However, most of the time, the presence of the ionospheric horizontal gradient will be ignored over the equatorial region. In applications that use the Differential Global Pusitiuining System (DGPS) method, this neglect can cause a significant amount of error in the final user positioning. In this work, a 30 electron density model was developed far a desired region of latitude and longitude at 350 km by using the value of electron density from the International Reference Ionosphere (IRI). This model represents the actual formation of the ionosphere in 3D (inhomogeneous). This model then will be incorporated as the new clcckon densitys ubroutine in thc Jones 3D Ray Tracing program in order to determinc the ionospheric horizontal gradient effect for GPS signals that passes through the equatorial ionospheric.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: ionosphcric horizontal gradient; 3D electron density; Jones 3D Ray Tracing; INPACS: 94.20.Cf
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA501-625 Surveying
Divisions: Faculty of Electrical and Electronic Engineering > Department of Communication Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 24 Jul 2013 07:15
Last Modified: 21 Jan 2015 08:19
URI: http://eprints.uthm.edu.my/id/eprint/3969
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