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Higher order ionospheric propagation effects on GPS radio occultation signals

Hoque, M. M. and Jakowski, N. (2010) Higher order ionospheric propagation effects on GPS radio occultation signals. Advances in Space Research, 46, Issue 2, 15 July 2010, Pages 162-173, pp. 162-173. Elsevier. DOI: 10.1016/j.asr.2010.02.013 ISSN 0273-1177

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Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/644/description#description


With the increasing number of remote sensing satellites using the GPS radio occultation technique for atmospheric sounding, the estimation of higher order ionospheric effects and their mitigation have become relevant and important. Due to long ionospheric limb paths, GPS signals are strongly affected by ionospheric refraction during radio occultation. Standard dual-frequency GPS measurements may be used to estimate the first order term of the refractive index. However, non-linear terms such as the second and third order ionospheric terms and ray path bending effects are not considered in occultation measurements so far. Analysing selected CHAMP–GPS occultation events different higher order ionospheric terms are estimated and their effects on dual-frequency range estimation and total electron content (TEC) estimation are discussed. We have found that the separation between the GPS L1 and L2 ray paths exceeds the kilometer level during occultation for a vertical TEC level of more than 160 TEC units. Corresponding errors in the GPS dual-frequency range estimation and TEC estimation are found to exceed the meter and 10 TEC units level, respectively.

Item URL in elib:https://elib.dlr.de/68019/
Document Type:Article
Title:Higher order ionospheric propagation effects on GPS radio occultation signals
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoque, M. M.mainul.hoque (at) dlr.deUNSPECIFIED
Jakowski, N.norbert.jakowski (at) dlr.deUNSPECIFIED
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:46, Issue 2, 15 July 2010, Pages 162-173
DOI :10.1016/j.asr.2010.02.013
Page Range:pp. 162-173
Keywords:Higher order ionospheric propagation terms, radio occultation, GNSS positioning, total electron content
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:10 Jan 2011 11:16
Last Modified:06 Sep 2019 15:27

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