Open AccessComparison of GPS TEC with IRI models of 2007, 2012, AND 1 2016 over Sukkur, Pakistan
Author(s) -
Adil Hussain,
Munawar Shah
Publication year - 2020
Publication title -
natural and applied sciences international journal
Language(s) - English
Resource type - Journals
ISSN - 2788-4619
DOI - 10.47264/idea.nasij/1.1.1
Subject(s) - tec , global positioning system , vtec , international reference ionosphere , total electron content , environmental science , latitude , ionosphere , earth's magnetic field , altitude (triangle) , meteorology , geography , geodesy , computer science , mathematics , telecommunications , physics , biochemistry , chemistry , geometry , escherichia coli , astronomy , gene , quantum mechanics , magnetic field
The international reference ionosphere (IRI) models have been widely used for correcting the ionospheric scintillations at different altitude levels. An evaluation on the performance of VTEC correction from IRI models (version 2007, 2012 and 2016) over Sukkur, Pakistan (27.71º N, 68.85º E) is presented in this work. Total Electron Content (TEC) from IRI models and GPS in 2019 over Sukkur region are compared. The main aim of this comparative analysis is to improve the VTEC in low latitude Sukkur, Pakistan. Moreover, this study will also help us to identify the credible IRI model for the correction of Global Positioning System (GPS) signal in low latitude region in future. The development of more accurate TEC finds useful applications in enhancing the extent to which ionospheric influences on radio signals are corrected. VTEC from GPS and IRI models are collected between May 1, 2019 and May 3, 2019. Additionally, Dst and Kp data are also compared in this work to estimate the geomagnetic storm variations. This study shows a good correlation of 0.83 between VTEC of GPS and IRI 2016. Furthermore, a correlation of 0.82 and 0.78 is also recorded for IRI 2012 and IRI 2007 respectively, with VTEC of GPS. The IRI TEC predictions and GPS-TEC measurements for the studied days reveal the potential of IRI model as a good candidate over Pakistan.