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Estimate of higher order ionospheric errors in GNSS positioning

Hoque, Mohammed Mainul and Jakowski, Norbert (2008) Estimate of higher order ionospheric errors in GNSS positioning. Radio Science. American Geophysical Union. DOI: 10.1029/2007RS003817.

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Official URL: http://www.agu.org/journals/rs/


Precise navigation and positioning using GPS/GLONASS/Galileo require the ionospheric propagation errors to be accurately determined and corrected for. Current dual-frequency method of ionospheric correction ignores higher order ionospheric errors such as the second and third order ionospheric terms in the refractive index formula, and errors due to bending of the signal. The total electron content (TEC) is assumed to be same at two GPS frequencies. All these assumptions lead to erroneous estimations and corrections of the ionospheric errors. In this paper a rigorous treatment of these problems is presented. Different approximation formulas have been proposed to correct errors due to excess path length in addition to the free space path length, TEC difference at two GNSS frequencies and third order ionospheric term. The GPS dual-frequency residual range errors can be corrected within millimeter level accuracy using the proposed correction formulas.

Document Type:Article
Title:Estimate of higher order ionospheric errors in GNSS positioning
AuthorsInstitution or Email of Authors
Hoque, Mohammed MainulUNSPECIFIED
Jakowski, NorbertUNSPECIFIED
Journal or Publication Title:Radio Science
Refereed publication:Yes
In ISI Web of Science:Yes
Publisher:American Geophysical Union
Keywords:GNSS positioning, signal refraction, ionospheric correction
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
Deposited By: Mohammed Mainul Hoque
Deposited On:17 Nov 2008
Last Modified:14 Jan 2010 23:47

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