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Application of SWACI products as ionospheric correction for single-point positioning: a comparative study

Minkwitz, David and Gerzen, Tatjana and Wilken, Volker and Jakowski, Norbert (2014) Application of SWACI products as ionospheric correction for single-point positioning: a comparative study. Journal of Geodesy, 88 (5), pp. 463-478. Springer. doi: 10.1007/s00190-014-0698-8. ISSN 0949-7714.

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Official URL: http://link.springer.com/article/10.1007%2Fs00190-014-0698-8


In Global Navigation Satellite Systems (GNSS) using L-band frequencies, the ionosphere causes signal delays that correspond with link related range errors of up to 100 m. In a first order approximation the range error is proportional to the total electron content (TEC) of the ionosphere. Whereas this first order range error can be corrected in dual-frequency measurements by a linear combination of carrier phase- or code-ranges of both frequencies, single-frequency users need additional information to mitigate the ionospheric error. This information can be provided by TEC maps deduced from corresponding GNSS measurements or by ionospheric models. In this paper we discuss and compare different ionospheric correction methods for single-frequency users. The focus is on the comparison of the positioning quality using dual-frequency measurements, the Klobuchar model, the NeQuick model, the IGS TEC maps, the Neustrelitz TEC Model (NTCM-GL) and the reconstructed NTCM-GL TEC maps both provided via the ionosphere data service SWACI (http://swaciweb.dlr.de) in near real-time. For that purpose, data from different locations covering several days in 2011 and 2012 are investigated, including periods of quiet and disturbed ionospheric conditions. In applying the NTCM-GL based corrections instead of the Klobuchar model, positioning accuracy improvements up to several meters have been found for the European region in dependence on the ionospheric conditions. Further in mid- and low-latitudes the NTCM-GL model provides results comparable to NeQuick during the considered time periods. Moreover, in regions with a dense GNSS ground station network the reconstructed NTCM-GL TEC maps are partly at the same level as the final IGS TEC maps.

Item URL in elib:https://elib.dlr.de/88831/
Document Type:Article
Title:Application of SWACI products as ionospheric correction for single-point positioning: a comparative study
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wilken, VolkerUNSPECIFIEDhttps://orcid.org/0009-0001-6783-7062UNSPECIFIED
Jakowski, NorbertUNSPECIFIEDhttps://orcid.org/0000-0003-3174-2624UNSPECIFIED
Date:10 April 2014
Journal or Publication Title:Journal of Geodesy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 463-478
Keywords:GNSS , Single-point positioning , Ionospheric delay , NTCM-GL TEC maps , NeQuick , IGS TEC maps , Klobuchar model , SWACI
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 (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Minkwitz, David
Deposited On:29 Jun 2014 22:47
Last Modified:06 Nov 2023 14:26

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