Method for improving convergence speed of combined precise point positioning of GPS (Global Position System) and GLONASS

A precise single-point positioning and convergence speed technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of imprecise theory, absorption of GLONASS code frequency deviation, and non-providing
CN104597465AActive Publication Date: 2015-05-06HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2015-05-06

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Abstract

The invention discloses a method for improving a convergence speed of combined precision single-point positioning (PPP) of a GPS (Global Position System) and a GLONASS. A plurality of independent 'time frequency bias' parameters are introduced into a function model to make up the defect in the prior art that GLONASS code inter-frequency bias is ignored in a modeling process; the convergence speed of the combined PPP of the GPS and the GLONASS is remarkably improved under the condition of not losing positioning precision. With the adoption of the method disclosed by the invention, a random model of GLONASS and GPS equal weight can be used for obtaining a code pseudo-range observation value when the PPP is combined, so that the defect that the weight ratio is determined by experiences in the prior art is avoided.
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Description

technical field

[0001] The invention relates to the technical field of satellite geodesy and navigation positioning, in particular to a method for improving the convergence speed of GPS and GLONASS combined precision single point positioning. Background technique

[0002] With the continuous advancement of GLONASS modernization process, as of December 8, 2011, GLONASS has 24 satellites in orbit, and the system has resumed full operation. Unlike GPS, the current GLONASS system uses Frequency Division Multiple Access (FDMA) technology to distinguish signals from different satellites. The satellite signal will generate a corresponding hardware delay in the internal frequency channel of the receiver, which is generally divided into an average delay bias item and a delay bias item that varies depending on the channel frequency. The latter is also called Inter-Frequency Bias (IFB ). Because GLONASS adopts FDMA technology, satellite signals of different frequencies will enter the...

Claims

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