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A new approach for mitigating ionospheric mapping function errors

Hoque, Mohammed M. and Jakowski, N. and Berdermann, J. (2014) A new approach for mitigating ionospheric mapping function errors. ION GNSS+ 2014, 8.-12. Sep. 2014, Tampa, USA.

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Official URL: http://www.ion.org/gnss/abstracts.cfm?paperID=1704

Abstract

Space-based navigation systems operating at single frequencies below 10 GHz require ionospheric information for correcting the signal delay or range error. In order to mitigate ionospheric errors as well as satellite clock and orbit errors especially in aircraft navigation, Space-Based Augmentation Systems (SBAS) such as WAAS and EGNOS have been established worldwide. In the current standard, the SBAS broadcasts vertical ionospheric delays at the ionospheric grid points (IGP) spaced by five degrees in latitude and longitude. The vertical delay is converted at user level to the required specific slant delay by using an obliquity factor called mapping function (MF) derived under the simplifying assumption of a thin-shell ionosphere fixed at 350 km height. In the present work we compared the performance of the thin-shell MF with a new MF approach derived based on multi-layer ionosphere assumption using data from a network of about 200 ground GNSS stations worldwide. We have found that using the new MF instead of the thin-shell MF the mean errors in slant delay computation can be reduced by more than 50% regardless of the user location and ionospheric conditions.

Item URL in elib:https://elib.dlr.de/93257/
Document Type:Conference or Workshop Item (Speech)
Title:A new approach for mitigating ionospheric mapping function errors
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoque, Mohammed M.Mainul.Hoque (at) dlr.deUNSPECIFIED
Jakowski, N.norbert.jakowski (at) dlr.deUNSPECIFIED
Berdermann, J.jens.berdermann (at) dlr.deUNSPECIFIED
Date:September 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Ionosphere Mapping Function, correction model, GNSS, SBAS
Event Title:ION GNSS+ 2014
Event Location:Tampa, USA
Event Type:international Conference
Event Dates:8.-12. Sep. 2014
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 09:12
Last Modified:01 Dec 2018 19:50

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