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A new global TEC model for estimating transionospheric radio wave propagation errors

Jakowski, N. and Hoque, M. M. and Mayer, C. (2011) A new global TEC model for estimating transionospheric radio wave propagation errors. Journal of Geodesy, 85 (12), pp. 965-974. Springer. DOI: 10.1007/s00190-011-0455-1 ISSN 0949-7714

Full text not available from this repository.

Abstract

Space-based navigation and radar systems operating at single frequencies of <10 GHz require ionospheric corrections of the signal delay or range error. Because this ionospheric propagation error is proportional to the total electron content of the ionosphere along the ray path, a user friendly TEC model covering global scale and all levels of solar activity should be helpful in various applications. Since such a model is not available yet, we present an empirical model approach that allows determining global TEC very easily. Although the number of model coefficients and parameters is rather small, the model describes main ionospheric features with good quality. Presented is the empirical approach describing dependencies on local time, geographic/geomagnetic location and solar irradiance and activity. The non-linear approach needs only 12 coefficients and a few empirically fixed parameters for describing the broad spectrum of TEC variation at all levels of solar activity. The model approach is applied on high-quality global TEC data derived by the Center for Orbit Determination in Europe (CODE) at the University of Berne over more than half a solar cycle (1998–2007). The model fits to these input data with a negative bias of 0.3 TECU and a RMS deviation of 7.5 TECU. As other empirical models too, the proposed Global Neustrelitz TEC Model NTCM-GLis climatological, i.e. the model describes the average behaviour under quiet geomagnetic conditions. During severe space weather events the actual TEC data may deviate from the model values considerably by more than 100%. A preliminary comparison with independent data sets as TOPEX/Poseidon altimeter data reveals similar results for NeQuick and NTCM-GL with RMS deviations in the order of 5 and 11 TECU (1 TECU = 1016 electrons/m2) for low and high-solar activity conditions, respectively. The more extended data base of ionosphere information that accumulates in the coming years will help in further improving the set of coefficients of the model.

Item URL in elib:https://elib.dlr.de/71792/
Document Type:Article
Title:A new global TEC model for estimating transionospheric radio wave propagation errors
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jakowski, N.DLRUNSPECIFIED
Hoque, M. M.DLRUNSPECIFIED
Mayer, C.DLRUNSPECIFIED
Date:November 2011
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
Volume:85
DOI :10.1007/s00190-011-0455-1
Page Range:pp. 965-974
Publisher:Springer
ISSN:0949-7714
Status:Published
Keywords:Ionosphere, Total electron content, Empirical model, 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: Jakowski, Dr.rer.nat. Norbert
Deposited On:25 Nov 2011 07:46
Last Modified:26 Mar 2013 13:33

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