Star-network-based BDS/GPS broadcast type network RTK algorithm

Abstract

The invention discloses a star-network-based BDS / GPS broadcast type network RTK algorithm. All base stations form a triangulation network based on a Delaunay triangulation algorithm; and a controllable full-region star network formed by a plurality of star network elements is generated based on the triangulation network. Data of the base stations are obtained in real time and network element calculation is carried out to generate a baseline atmospheric error. Meanwhile, a server side broadcasts a main station observation value, a base station coordinate and the baseline atmospheric error to auser by using the star network as a unit based on a UDP protocol; the user selects one network element based on an own approximate position and the position of the main station; interpolation is carried out on an inter-station single-difference atmospheric error of the baseline formed by the user and the main station and the obtained atmospheric error is corrected to the observation value of the main station to carry out baseline calculation. Besides, the user also can uploads an approximate coordinate by two-way communication and the server side broadcasts difference data of the network element in which the user is located. And difference data broadcasting by equipment like ground equipment, an aircraft or a satellite is also supported.

Description

technical field [0001] The present invention relates to a BDS / GPS broadcast network RTK algorithm based on a star network, in particular to a network RTK (Real Time Kinematic, real-time dynamic positioning technology) based on a star network BDS compatible with GPS broadcast mode and compatible with two-way communication ) implementation technology, which belongs to the field of GNSS real-time high-precision fast positioning. Background technique [0002] Network RTK technology has become one of the most widely used GNSS precision positioning technologies at present, and can provide users with multi-scale positioning services such as meter level, decimeter level and centimeter level in real time [1-3] . According to the broadcasting method of differential data, at present, the mainstream network RTK technology can be divided into VRS (Virtual Reference Station, virtual reference station) technology, MAC (Master Auxiliary Concept, master auxiliary station) technology and FKP...

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are: ① Two-way communication is required, which increases the data delay; ② When the user's location changes greatly (more than 5km), the virtual reference station will change, and the user needs to re-initialize; ③ The central software needs to be based on the user's approximate location Generate virtual reference station information for each user, which limits user capacity; ④Due to the use of virtual information, differential correction information cannot be tracked; ⑤Although VRS technology itself does not limit the number of reference stations in network elements, the current The software is basically implemented based on triangulation and lacks redundant information; ⑥The atmospheric error processing method is only determined by the central software, making it impossible for users to use better algorithms [4] ;⑦It is necessary to upload the user's general location information, which exposes the user's location, especially in some special fields, this method is not even advisable, such as the military field

The disadvantages of this technology are: ①The central software uses the non-difference algorithm to solve the network, with many parameters and complex models, which makes the settlement efficiency low and the network initialization time is long; ②The establishment of the spatial correlation error model is completed by the central software, which limits the use of users more optimized algorithm

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