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BDS_GPS_GLONASS precise point positioning integration method

A technology of precise single-point positioning and precise ephemeris, which is applied to satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as increasing operating costs, affecting operating efficiency, and prolonging observation time, achieving reduced convergence time, Increase the number of visible satellites and improve the effect of space satellite distribution

Inactive Publication Date: 2017-01-11
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

This observation method does not need to consider complex error models, and has the advantages of simple calculation model and high positioning accuracy; but there are also some shortcomings, such as at least one receiver is placed on a known station during observation, which affects the operation efficiency and improves the positioning accuracy. Operating costs; in addition, as the distance increases, the correlation of errors such as tropospheric delay and ionospheric delay weakens, and the observation time must be extended accordingly to achieve the expected accuracy

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  • BDS_GPS_GLONASS precise point positioning integration method
  • BDS_GPS_GLONASS precise point positioning integration method
  • BDS_GPS_GLONASS precise point positioning integration method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0016] The present invention comprises the following steps:

[0017] (1) Read raw data

[0018] Note: The original data include: GPS, GLONASS, BDS three systems RINEX format original observation data, broadcast ephemeris, precise ephemeris, precise clock difference.

[0019] (2) Data preprocessing

[0020] Description: For the original data of GPS, GLONASS, and BDS, the M-W combined detection method is used to detect cycle slips and eliminate gross errors. Use the carrier phase that has detected cycle slips to smooth out the pseudo-ranges of gross errors, and perform unified processing on the three-system space-time references of GPS, GLONASS, and BDS.

[0021] (3) Establish a precise single point positioning model

[0022] Explanation: Interpolate precise ephemeris and...

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Abstract

The invention provides a BDS_GPS_GLONASS precise point positioning integration method. The BDS_GPS_GLONASS precise point positioning integration method comprises the steps of first of all, reading original data in three systems (GPS, GLONASS and BDS) and making cycle slip detection and gross error removal by M-W combined detection method; secondly, unifying time and space datum of three systems; next, building three-system observation equation, correcting error in the method of iono-free combination of dual-band pseudo range and carrier phase measurement and setting up a random model; lastly, solving ambiguity and coordinate by extending Kalman filtering. The BDS_GPS_GLONASS precise point positioning integration method of the embodiment can greatly improve geometric strength of satellite, remarkably enhance independence and integrity of positioning system, effectively reduce time of positioning and convergence, and enhance positioning precision in small number of one-system satellites or poorer satellite constellation distribution.

Description

technical field [0001] The invention relates to a positioning method, which belongs to the field of satellite navigation high-precision non-difference positioning. Background technique [0002] In traditional GPS static positioning, the accuracy of absolute positioning is about 20m, which cannot meet the needs of precise navigation and measurement users. Generally, relative positioning is used to eliminate common errors such as receiver clock error and satellite clock error by forming double-difference observations. And weaken the impact of highly correlated errors such as tropospheric delay and ionospheric delay to achieve the purpose of improving accuracy. This observation method does not need to consider complex error models, and has the advantages of simple calculation model and high positioning accuracy; but there are also some shortcomings, such as at least one receiver is placed on a known station during observation, which affects the operation efficiency and improves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/33G01S19/40G01S19/42
CPCG01S19/33G01S19/40G01S19/42
Inventor 田宇李路程王刚李洋黄河
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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