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http://dx.doi.org/10.5140/JASS.2010.27.4.359

Global GPS Ionospheric Modelling Using Spherical Harmonic Expansion Approach  

Choi, Byung-Kyu (Korea Astronomy and Space Science Institute)
Lee, Woo-Kyung (Korea Astronomy and Space Science Institute)
Cho, Sung-Ki (Korea Astronomy and Space Science Institute)
Park, Jong-Uk (Korea Astronomy and Space Science Institute)
Park, Pil-Ho (Korea Astronomy and Space Science Institute)
Publication Information
Journal of Astronomy and Space Sciences / v.27, no.4, 2010 , pp. 359-366 More about this Journal
Abstract
In this study, we developed a global ionosphere model based on measurements from a worldwide network of global positioning system (GPS). The total number of the international GPS reference stations for development of ionospheric model is about 100 and the spherical harmonic expansion approach as a mathematical method was used. In order to produce the ionospheric total electron content (TEC) based on grid form, we defined spatial resolution of 2.0 degree and 5.0 degree in latitude and longitude, respectively. Two-dimensional TEC maps were constructed within the interval of one hour, and have a high temporal resolution compared to global ionosphere maps which are produced by several analysis centers. As a result, we could detect the sudden increase of TEC by processing GPS observables on 29 October, 2003 when the massive solar flare took place.
Keywords
global positioning system; global ionosphere model; spherical harmonic expansion; total electron content;
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Times Cited By KSCI : 1  (Citation Analysis)
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