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dc.contributor.authorStrangeways, Hal J.
dc.contributor.authorHo, Yih-Hwa
dc.contributor.authorAquino, Marcio H. O.
dc.contributor.authorElmas, Zeynep G.
dc.contributor.authorMarques, H. A. [UNESP]
dc.contributor.authorGalera Monico, J. F. [UNESP]
dc.contributor.authorSilva, H. A. [UNESP]
dc.identifier.citationRadio Science. Washington: Amer Geophysical Union, v. 46, p. 14, 2011.
dc.description.abstractA method of determining spectral parameters p (slope of the phase PSD) and T (phase PSD at 1 Hz) and hence tracking error variance in a GPS receiver PLL from just amplitude and phase scintillation indices and an estimated value of the Fresnel frequency has been previously presented. Here this method is validated using 50 Hz GPS phase and amplitude data from high latitude receivers in northern Norway and Svalbard. This has been done both using (1) a Fresnel frequency estimated using the amplitude PSD (in order to check the accuracy of the method) and (2) a constant assumed value of Fresnel frequency for the data set, convenient for the situation when contemporaneous phase PSDs are not available. Both of the spectral parameters (p, T) calculated using this method are in quite good agreement with those obtained by direct measurements of the phase spectrum as are tracking jitter variances determined for GPS receiver PLLs using these values. For the Svalbard data set, a significant difference in the scintillation level observed on the paths from different satellites received simultaneously was noted. Then, it is shown that the accuracy of relative GPS positioning can be improved by use of the tracking jitter variance in weighting the measurements from each satellite used in the positioning estimation. This has significant advantages for scintillation mitigation, particularly since the method can be accomplished utilizing only time domain measurements thus obviating the need for the phase PSDs in order to extract the spectral parameters required for tracking jitter determination.en
dc.description.sponsorshipEngineering and Physical Sciences Research Council (EPSRC)
dc.description.sponsorshipRoyal Society
dc.publisherAmer Geophysical Union
dc.relation.ispartofRadio Science
dc.sourceWeb of Science
dc.titleOn determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigationen
dcterms.rightsHolderAmer Geophysical Union
dc.contributor.institutionNewcastle Univ
dc.contributor.institutionUniv Nottingham
dc.contributor.institutionUniv Teknikal Malaysia Melaka
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Leeds
dc.description.affiliationNewcastle Univ, Sch Elect Elect & Comp Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
dc.description.affiliationUniv Nottingham, Inst Engn Surveying & Space Geodesy, Nottingham NG7 2RD, England
dc.description.affiliationUniv Teknikal Malaysia Melaka, Sch Elect & Comp Engn, Melaka LS2 9JT, Malaysia
dc.description.affiliationSão Paulo State Univ, Dept Cartog, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.affiliationUniv Leeds, Sch Elect & Elect Engn, Leeds, W Yorkshire, England
dc.description.affiliationUnespSão Paulo State Univ, Dept Cartog, BR-19060900 Presidente Prudente, SP, Brazil
dc.rights.accessRightsAcesso restrito
dc.description.sponsorshipIdUK EPSRC: EP/H004637/1
dc.description.sponsorshipIdUK EPSRC: EP/H003479/1
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept
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