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Unified model-based Beidou undifferenced and uncombined PPP (precise point positioning)-RTK (real-time kinematic) positioning method

A PPP-RTK, non-difference and non-combination technology, applied in satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve the problems of low model correction accuracy, noise amplification communication pressure, and amplification observation noise, etc. Achieve the effects of monitoring and modeling, and solving delay errors

Inactive Publication Date: 2018-01-09
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing PPP technology, the double-frequency ionospheric error is eliminated by ionospheric combination to amplify the observation noise, and the single-frequency ionospheric error is eliminated by model correction. Both RTK and network RTK adopt double-difference technology and two-way communication Mode, there is a lack of noise amplification and communication pressure, the present invention provides a Beidou non-difference non-combined PPP / RTK positioning method based on a unified model, the ionospheric error is integrated into the positioning model for parameter estimation or regional comprehensive error correction, based on Different forms of correction information, realize the seamless link of PPP and RTK data processing and positioning services through the non-difference unified model

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  • Unified model-based Beidou undifferenced and uncombined PPP (precise point positioning)-RTK (real-time kinematic) positioning method

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[0022] 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.

[0023] The invention organically unifies the non-difference and non-combination PPP and non-difference network RTK positioning methods. Based on a unified data processing model, users can realize the seamless connection between PPP and RTK positioning services by using different types of correction information. For global users, by receiving real-time orbit and clock error corrections and performing non-difference and non-combined PPP calculations, after 20 to 30 minutes of initialization time, decimeter to centimeter level precision positioning can be achieved. For users in the area, by receiving the comprehensive error correction number of the area, the non-difference network RTK solution is performed, and after a few seconds of initialization time, centimeter-level preci...

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Abstract

The present invention provides a unified model-based Beidou undifferenced and uncombined PPP (precise point positioning)-RTK (real-time kinematic) positioning method. According to the method, as for users on the globe, real-time orbits and clock error corrections are received, so that undifferenced and uncombined PPP calculation is performed; initialization is performed, so that decimeter-centimeter-level precision positioning is realized; for users in regions, integrated error corrections of the regions are received, undifferenced network RTK calculation is performed; and initialization is performed, so that centimeter-level precision positioning is realized. With the method of the invention adopted, the seamless linking of undifferenced PPP data processing and undifferenced network RTK data processing can be realized, fast and high-precision positioning services can be provided, and the total electron content of an ionized layer and the differential code deviation information of a receiver can be obtained.

Description

technical field [0001] The invention relates to a positioning modeling method. Background technique [0002] Precise point positioning (PPP) and carrier phase difference real-time kinematic positioning (RTK) are the main data processing technologies in precision positioning. They have been deeply researched and widely used, but there are still some defects in their applicability and scalability. First of all, the current precise point positioning adopts non-difference positioning technology, and the ionosphere-free combination is used to eliminate the dual-frequency observation in the ionospheric error processing, which has the phenomenon of noise error amplification compared with the non-combined observation value; Low; at the same time, the current RTK and network RTK both use double-difference technology, which requires two-way communication between users and base stations, and there is a problem of communication congestion for a large number of users; in addition, the tw...

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Application Information

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IPC IPC(8): G01S19/44G01S19/07
Inventor 涂锐卢晓春张睿张鹏飞张兴刚刘金海黄小东洪菊王星星
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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