Self-adaptive grid VRS generation and service method

Abstract

The invention discloses a self-adaptive grid VRS (virtual reference signal) generation and service method. The method comprises the following steps: reading coordinate information of a whole grid reference station, and respectively generating grid points covering the whole reference station grid in the east direction and the north direction at equal intervals to obtain coordinates of all grid points; reading double-difference error correction number information between whole network reference stations of one epoch, and calculating double-difference error correction numbers of visual satellitesof all grid points; determining the differences of double-difference error correction numbers of different grid points, and marking invalid grid points to obtain irregular grid points of the epoch; determining the number of grid point user requests, marking grid points in the service, and providing a grid point VRS serviceof the epoch; and repeating the above steps till completion of processing of all epochs. The grid points are adaptively generated in real time, and the calculation amount of the CORS system and the user service precision are both considered; and the grid point VRS is dynamically generated according to the user request, so that the calculation amount of the CORS system is greatly reduced.

Description

technical field [0001] The invention belongs to satellite navigation and positioning data processing technology, in particular to a method for generating and serving an adaptive grid VRS. Background technique [0002] At present, there are thousands of various GNSS reference stations established in my country, and nearly 100 provincial and municipal CORS systems. However, multiple independent regional CORS systems have many problems, such as repeated construction of GNSS reference station resources, inability to share servers, and limited user service scope and quantity. It is inevitable for the development of my country's GNSS real-time high-precision positioning to transform the decentralized CORS system into a CORS system for unified management, maintenance and service across the country. For a national CORS system, the scope and number of users it serves are extremely large. The VRS broadcast method commonly used in regional CORS systems will greatly limit the number of...

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Problems solved by technology

[0003] However, due to factors such as uneven distribution of reference stations and uneven distribution of atmospheric conditions in the survey area, the accuracy of VRS observations obtained from grid points established at equal intervals is not the same, which will cause inconsistent user service accuracy

On the other hand, using equidistant grid points, if the grid point spacing is too small, it will increase the calculation amount of the system and waste computing resources; if the grid point spacing is too large, it will reduce the accuracy of grid point VRS observation values, thereby reducing the accuracy of user services

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