Abstract
Ambiguity resolution of phase measurements during Precise Point Positioning (PPP) in global navigation satellite systems (GNSSs) is implemented. The underlying feature of the design matrix of singular systems of GNSS linearized equations allowing one to estimate the user coordinates with ambiguity resolution of phase measurements is revealed. Details of the algebraic methods of overcoming the rank deficiency associated with the procedure are considered. Observation models at GPS and GLONASS initial frequencies are proposed and investigated. A filtering method allowing one to exclude the influence of ionospheric signal delays on estimates of user coordinates in processing of the measurement at initial GPS and GLONASS frequencies is described. Significant reduction of the PPP convergence period due to ambiguity resolution of phase measurements is shown. Comparison of the quality of user positioning with the use of decoupled satellite clocks calculated from global and local network solutions is presented.
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Original Russian Text © A.A. Povalyaev, A.N. Podkorytov, 2015, published in Radiotekhnika i Elektronika, 2015, Vol. 60, No. 8, pp. 813–824.
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Povalyaev, A.A., Podkorytov, A.N. Precise point positioning in global navigation satellite systems with ambiguity resolution of phase measurements. J. Commun. Technol. Electron. 60, 860–870 (2015). https://doi.org/10.1134/S1064226915070141
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DOI: https://doi.org/10.1134/S1064226915070141