Beidou satellite GPS dual-mode cloud differential positioning method and system

Abstract

The invention relates to a satellite navigation positioning system, in particular to a Beidou satellite GPS dual-mode cloud differential positioning method and system. The Beidou satellite GPS dual-mode cloud differential positioning method comprises the following steps: each datum cloud end provides datum data for a system control center, wherein the datum cloud end is carried with a Beidou satellite GPS dual-mode receiver according with the location precision requirement; the system control center preprocesses the received datum data; when the positioning precision is insufficient, a common cloud end sends a differential positioning request to the system control center, wherein the common cloud end is carried with a single-mode single-frequency receiver or is not carried with a Beidou satellite GPS dual-mode receiver which does not accord with the positioning precision requirement; the system control center selects reasonable differential data and sends the reasonable differential data to the common cloud end; and the common cloud end carries out positioning according to the received differential data. The invention is applied to satellite navigation positioning.

Description

technical field [0001] The invention relates to a satellite navigation and positioning system, in particular to a Beidou GPS dual-mode cloud differential positioning method and system. Background technique [0002] At present, single-frequency receivers cannot accurately estimate or eliminate the errors of tropospheric delay, atmospheric delay and multipath effects of satellite signals. These errors will seriously affect the positioning accuracy when the constellation distribution is unreasonable. [0003] In order to eliminate or reduce these errors, differential operations are usually used in positioning. Differential positioning is a key technology in high-precision satellite positioning, and it is also a key requirement for solving enterprise location applications and enhancing positioning and navigation product services such as: dangerous goods vehicle transportation management, bus station reporting and alarming, etc. Regarding the improvement of positioning accuracy,...

AI Technical Summary

Problems solved by technology

Regarding the improvement of positioning accuracy, the existing technology based on standard base station differential positioning can overcome various signal delay effects and obtain relatively ideal positioning accuracy, but the base station-based differential positioning technology has the following disadvantages: 1. The standard base station invests a lot of money and the range of action Limited, a standard base station can only function within a range of 100KM; 2. The number of GPS standard base stations in China is limited, and Beidou positioning system currently has no standard base stations to provide open differential positioning services

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