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AssigneeTopcon Positioning Systems, Inc.
InventorsKirill Sergeevich KOLOSOV, Dmitry Pavlovich NIKITIN, Evgeny Dmitrievich MATVEEV
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A method and system for high-quality ionosphere spatial interpolation is designed to improve outlier detection and accuracy estimation in regional networks to accelerate convergence of PPP-RTK positioning services. STEC estimations from a regional receiver network undergo a sequence of anomaly detection steps including jump detection by Alpha-Beta filtering, outlier detection by a posteriori residuals from differenced STEC spatial approximation and by cross-validation of differenced STEC values. The method further includes generating an estimation of ionosphere activity indicator which is further used in outlier detection. On-the-fly estimation of the indicator provides more robust STEC outliers detection because it accounts for systematic periodic changes in ionosphere activity and for spatial correlation of the ionosphere.
A method for fast precise service, the method comprising:
An apparatus for precise point positioning, the apparatus comprising:
A computer readable medium storing computer program instructions for precise point positioning, which, when executed on a processor, cause the processor to perform operations comprising:
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