Method for implementing GNSS network synthesis positioning service system

Abstract

The invention discloses a method for realizing a GNSS network comprehensive positioning service system, and belongs to the field of the construction of positioning service systems. In the method, at least three reference stations are arranged in a work zone according to network differential positioning technology, the reference stations and a relay server build a dedicated data transmission network VPN in a telecommunication public network to complete data transmission, and both the two subsystems for real-time positioning service and off line data service of a service center acquire data sources from the relay server and then provide corresponding services for real-time mobile station users and off line users respectively. The method of the invention improves the conventional many-to-onedata transfer mode, changes a file-based data storage system mode, guarantees the data communication among the reference station, mobile stations and system service center through a NTRIP protocol and realizes system standardization.

Description

Implementation method of GNSS network integrated positioning service system technical field The invention relates to a construction method of a real-time positioning service system, in particular to a method for realizing a GNSS comprehensive positioning service system based on the Internet and a wireless communication network GPRS, and belongs to the field of construction of a positioning service system. Background technique In the traditional RTK positioning technology, as the distance between the mobile station and the reference station increases, the correlation of spatial errors weakens, causing the system error residual to increase rapidly, resulting in a decrease in positioning accuracy. Relatively small, so that the scope of RTK operations is greatly limited. Network RTK overcomes the shortcomings of conventional RTK technology. Through long-term observations of multiple continuously operating reference stations, the ionospheric delay, tropospheric delay and orbit ...

AI Technical Summary

Problems solved by technology

At present, the operation mode of the multi-reference station network differential positioning service system that has been built or is under construction in some provinces and cities in China mainly has the following characteristics: First, the reference station access to the main control center adopts a many-to-one connection method, that is, the main control station application The program directly establishes a connection with the GPS receiver of the reference station by renting a DDN channel. The disadvantage of this is that the acquisition of reference station data is greatly restricted, and it can only be provided to limited users according to the number of serial ports of the receiver; A file-based data storage system is adopted: the base station regularly returns the observation value files, the central station stores these files in chronological order, and distributes these files to users when they need it. This method is simple to implement and has great impact on the reliability of the transmission network. The requirements are relatively low, but the real-time performance is relatively poor, the service form is not flexible, and it is not suitable for the management of massive data

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