Positioning method, device and system for Beidou navigation system

Abstract

The invention provides a positioning method, device and system for a Beidou navigation system. The method includes the steps of S1, obtaining a first pseudorange between the device and an observation satellite; S2, receiving first ephemeris data transmitted by the observation satellite; S3, receiving pseudorange difference revised data, transmitted by a difference reference station data processing center, of the observation satellite, wherein the pseudorange difference revised data further comprise the age of second ephemeris data, received by the difference reference station data processing center, of the observation satellite; S4, judging whether the age of the second ephemeris data is matched with the age of the first ephemeris data or not; S5, revising the first pseudorange according to the pseudorange difference revised data so as to obtain a second pseudorange if the age of the second ephemeris data is matched with the age of the first ephemeris data; S6, obtaining a first coordinate position according to the second pseudorange and the first ephemeris data. By means of the method, the positioning accuracy can be improved.

Description

technical field [0001] The invention belongs to the technical field of navigation, and in particular relates to a positioning method, device and system for the Beidou satellite navigation system. Background technique [0002] BeiDou Navigation Satellite System (BDS) is a self-developed and independently operated global satellite navigation system being implemented by China. It is committed to providing high-quality positioning, navigation and timing services to global users, and can provide higher Authorized users are required to provide further services, both military and civilian. [0003] At present, there are 14 satellites working in the service area, which are used to provide positioning, speed measurement, and timing services for free, with a positioning accuracy of 10 meters. [0004] The current problem is that because the positioning accuracy of the Beidou satellite navigation system is about 10 meters, the positioning cannot meet the positioning and navigation nee...

AI Technical Summary

Problems solved by technology

[0004] The current problem is that because the positioning accuracy of the Beidou satellite navigation system is about 10 meters, the positioning cannot meet the positioning and navigation needs of users, and the positioning accuracy is low

For example, when a vehicle is driving at an elevated overpass, the displayed origin often has a large deviation from its actual position; It may remind in real time that "the wrong lane is driven"; when the vehicle enters a highway toll booth, it will not prompt which lanes are ETC toll gates and which lanes are regular toll gates, etc.

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