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ESTIMATES OF HIGHER ORDER IONOSPHERIC PROPAGATION ERRORS FOR DUAL-FREQUENCY GNSS USERS

Hoque, Mohammed M. and Jakowski, Norbert (2009) ESTIMATES OF HIGHER ORDER IONOSPHERIC PROPAGATION ERRORS FOR DUAL-FREQUENCY GNSS USERS. The 11th International Conference on Ionospheric Radio Systems and Techniques, 28. - 30. April 2009, Edinburgh.

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Official URL: http://conferences.theiet.org/irst/index.htm

Abstract

Current dual-frequency methods of ionospheric correction eliminate the first order ionospheric term. However, the second and third order ionospheric terms in the refractive index, and errors due to bending of the signal are not fully compensated in this approach. The total electron content is assumed to be the same along two GPS signals, whereas in real cases, due to the dispersive nature of the ionosphere, the TEC along the GPS-L1 path will be different from that along the GPS-L2 path. Although the second order ionospheric term is considered in recent investigations, a common practice is to compute the magnetic field vector at a single point called the ionospheric pierce point assuming the ionosphere as a single layer at a certain altitude. All these approximations lead to erroneous estimations and corrections of the ionospheric errors. In this work, higher order ionospheric errors are rigorously treated and computed for a large number of ionosphere electron density profiles reconstructed from the CHAMP-GPS radio occultation measurements. Different higher order correction formulas have been evaluated using the CHAMP based profiles.

Item URL in elib:https://elib.dlr.de/62396/
Document Type:Conference or Workshop Item (Speech)
Title:ESTIMATES OF HIGHER ORDER IONOSPHERIC PROPAGATION ERRORS FOR DUAL-FREQUENCY GNSS USERS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoque, Mohammed M.Mainul.Hoque (at) dlr.deUNSPECIFIED
Jakowski, NorbertNorbert.Jakowski (at) dlr.deUNSPECIFIED
Date:2009
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Warrington, M.University of Leicester, UK
Status:Published
Keywords:GNSS positioning, ionospheric effects, signal bending, ionospheric correction
Event Title:The 11th International Conference on Ionospheric Radio Systems and Techniques
Event Location:Edinburgh
Event Type:international Conference
Event Dates:28. - 30. April 2009
Organizer:Institution of Engineering and Technology, UK
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Ionosphärenerkundung (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Jakowski, Dr.rer.nat. Norbert
Deposited On:11 Jan 2010 11:25
Last Modified:01 Dec 2018 19:47

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