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Three-dimensional data assimilation for ionospheric reference scenarios

Gerzen, Tatjana and Wilken, Volker and Minkwitz, David and Hoque, Mohammed Mainul and Schlüter, Stefan (2017) Three-dimensional data assimilation for ionospheric reference scenarios. Annales Geophysicae (35), pp. 203-215. Copernicus Publications. DOI: 10.5194/angeo-35-203-2017 ISSN 0992-7689

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Official URL: http://www.ann-geophys.net/35/203/2017/

Abstract

The reliable estimation of ionospheric refraction effects is an important topic in the GNSS (Global Navigation Satellite Systems) positioning and navigation domain, especially in safety-of-life applications. This paper describes a three-dimensional ionosphere reconstruction approach that combines three data sources with an ionospheric background model: space- and ground-based total electron content (TEC) measurements and ionosonde observations. First the background model is adjusted by F2 layer characteristics, obtained from space-based ionospheric radio occultation (IRO) profiles and ionosonde data, and secondly the final electron density distribution is estimated by an algebraic reconstruction technique. The method described is validated by TEC measurements of independent ground-based GNSS stations, space-based TEC from the Jason 1 and 2 satellites, and ionosonde observations. A significant improvement is achieved by the data assimilation, with a decrease in the residual errors by up to 98 % compared to the initial guess of the background. Furthermore, the results underpin the capability of space-based measurements to overcome data gaps in reconstruction areas where less GNSS ground-station infrastructure exists.

Item URL in elib:https://elib.dlr.de/111268/
Document Type:Article
Title:Three-dimensional data assimilation for ionospheric reference scenarios
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gerzen, Tatjanatatjana.gerzen (at) dlr.deUNSPECIFIED
Wilken, Volkervolker.wilken (at) dlr.deUNSPECIFIED
Minkwitz, Daviddavid.minkwitz (at) dlr.deUNSPECIFIED
Hoque, Mohammed Mainulmainul.hoque (at) dlr.deUNSPECIFIED
Schlüter, Stefanstefan.schlueter (at) dlr.deUNSPECIFIED
Date:6 February 2017
Journal or Publication Title:Annales Geophysicae
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.5194/angeo-35-203-2017
Page Range:pp. 203-215
Publisher:Copernicus Publications
ISSN:0992-7689
Status:Published
Keywords:Ionosphere, electron density, tomography, reconstruction, data Assimilation, STEC, ionosonde, Radio occultation
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
Deposited By: Minkwitz, David
Deposited On:24 Feb 2017 13:42
Last Modified:24 Feb 2017 13:42

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