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An Alternative Ionospheric Correction Model for Global Navigation Satellite Systems

Hoque, M. M. and Jakowski, N. (2014) An Alternative Ionospheric Correction Model for Global Navigation Satellite Systems. Journal of Geodesy. Springer. DOI: • DOI: 10.1007/s00190-014-0783-z ISSN 0949-7714

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Abstract

The ionosphere is recognized as a major error source for single frequency operations of Global Navigation Satellite Systems (GNSS). To enhance single frequency operations the Global Positioning System (GPS) uses an Ionospheric Correction Algorithm (ICA) driven by 8 coefficients broadcasted in the navigation message every 24 hours. Similarly the global navigation satellite system Galileo uses the electron density NeQuick model for ionospheric correction. The Galileo Satellite Vehicles (SVs) transmit 3 ionospheric correction coefficients as driver parameters of the NeQuick model. In the present work, we propose an alternative ionospheric correction algorithm called Neustrelitz TEC broadcast model NTCM-BC that is also applicable for global satellite navigation systems. Like the GPS ICA or Galileo NeQuick, the NTCM-BC can be optimized on a daily basis by utilizing GNSS data obtained at the previous day at monitor stations. To drive the NTCM-BC, 9 ionospheric correction coefficients need to be uploaded to the SVs for broadcasting in the navigation message. Our investigation using GPS data of about 200 worldwide ground stations shows that the 24 hour ahead prediction performance of the NTCM-BC is better than the GPS ICA and comparable to the Galileo NeQuick model. We have found that the 95 percentiles of the prediction error are about 16.1, 16.1 and 13.4 TECU for the GPS ICA, Galileo NeQuick and NTCM-BC, respectively, during a selected quiet ionospheric period whereas the corresponding numbers are found about 40.5, 28.2 and 26.5 TECU during a selected geomagnetic perturbed period. However, in terms of complexity the NTCM-BC is easier to handle than the Galileo NeQuick and in this respect comparable to the GPS ICA.

Item URL in elib:https://elib.dlr.de/93293/
Document Type:Article
Title:An Alternative Ionospheric Correction Model for Global Navigation Satellite Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoque, M. M.mainul.hoque (at) dlr.deUNSPECIFIED
Jakowski, N.norbert.jakowski (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Journal of Geodesy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :• DOI: 10.1007/s00190-014-0783-z
Publisher:Springer
ISSN:0949-7714
Status:Published
Keywords:single frequency, ionosphere delay correction, broacast model NTCM-BC, GNSS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Hoque, Mohammed Mainul
Deposited On:09 Dec 2014 09:14
Last Modified:03 Dec 2015 13:22

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