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.
|Title:||Estimate of higher order ionospheric errors in GNSS positioning|
|Journal or Publication Title:||Radio Science|
|In ISI Web of Science:||Yes|
|Publisher:||American Geophysical Union|
|Keywords:||GNSS positioning, signal refraction, ionospheric correction|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|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)|
|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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