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Ionospheric bending correction for GNSS radio occultation signals

Hoque, Mohammed Mainul and Jakowski, Norbert (2011) Ionospheric bending correction for GNSS radio occultation signals. Radio Science, 46 (RS0D06). Wiley. DOI: 10.1029/2010RS004583 ISSN 0048-6604

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Official URL: http://www.agu.org/pubs/crossref/2011/2010RS004583.shtml

Abstract

Ionospheric propagation effects on Global Navigation Satellite Systems (GNSS) signals are the most pronounced during radio occultation due to long ionospheric travel paths of the received signal on low Earth orbiting satellites. Inhomogeneous plasma distribution and anisotropy cause higher order nonlinear refraction effects on GNSS signals which cannot be fully removed through a linear combination of dual-frequency observables. In this paper, higher order ionospheric effects due to straight line of sight (LoS) propagation assumption such as the excess path length of the signal in addition to the LoS path and the total electron content difference between the curved path and the LoS path have been investigated for selected GPS-CHAMP occultation events. Based on simulation studies we have derived correction formulas for computing ray path bending effects as functions of signal frequency, tangential height of the ray path, ionospheric parameters such as the maximum ionization and total electron content. If these parameters are known the proposed correction method is able to correct on an average about 65 - 80% bending errors of GNSS occultation signals.

Item URL in elib:https://elib.dlr.de/70237/
Document Type:Article
Title:Ionospheric bending correction for GNSS radio occultation signals
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoque, Mohammed MainulMainul.Hoque (at) dlr.deUNSPECIFIED
Jakowski, NorbertNorbert.Jakowski (at) dlr.deUNSPECIFIED
Date:2011
Journal or Publication Title:Radio Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:46
DOI :10.1029/2010RS004583
Publisher:Wiley
ISSN:0048-6604
Status:Published
Keywords:ionospheric ray path bending, correction, radio occultation signals, GNSS positioning
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Weltraumwetter (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Hoque, Mohammed Mainul
Deposited On:29 Jun 2011 10:36
Last Modified:21 Sep 2019 05:05

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