Afterwards data quality evaluation method and system based on Beidou ground-based augmentation system

Abstract

The invention discloses a post-event data quality evaluation method and system based on a Beidou ground-based augmentation system. The method comprises the following steps: receiving observation data and navigation ephemeris of all reference stations connected with the Beidou ground-based augmentation system by using a distributed satellite data receiving system; performing data integrity analysis on the observation data to obtain a data integrity result of each base station; performing observation data quality analysis and broadcast ephemeris precision evaluation of each base station according to the observation data and the navigation ephemeris; and storing and displaying observation data quality analysis and broadcast ephemeris precision evaluation results of the reference stations. According to the post data quality evaluation method, each reference site of the foundation augmentation system can be well analyzed, site operation and maintenance logs are generated in time, site data quality is effectively analyzed, site operation problems are found and corrected in time, and external service use of foundation augmentation system data is supported.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation and positioning, and in particular relates to a post-event data quality evaluation method and system based on a Beidou ground-based augmentation system. Background technique [0002] GNSS (Global Navigation Satellite System, Global Navigation Satellite System) can provide global users with high-quality positioning, navigation and timing services, and plays a vital role in various fields. The collected observation data is analyzed for data quality. Through statistical and comparative analysis of the observation data quality analysis results, users can fully grasp the influence of different factors on the quality of GNSS observation data, and provide information for refining error correction models, function models, etc. refer to. The quality of observation data can be reflected by indicators such as data integrity, multipath effect and observation noise, signal-to-noise ratio, cycle s...

AI Technical Summary

Problems solved by technology

150 national framework network reference stations of the Beidou Ground-Based Augmentation System have been built, using multi-mode multi-frequency receivers and antenna equipment provided by 6 domestic manufacturers. The performance indicators and stability of these domestic equipment are comparable to those of GPS (Global Positioning There are differences in the quality of the output data (observation data and navigation messages), which leads to the complexity of the data quality analysis of each satellite navigation system, and the data quality is the prerequisite for the follow-up Beidou ground-based augmentation system to provide high-quality services. Therefore, It is necessary to carry out the research on the data quality analysis method of the Beidou ground-based augmentation system, which can fill the gap in the data quality analysis of the Beidou ground-based augmentation system and support the continuous and stable operation of the Beidou ground-based augmentation system

[0004] The research on data quality analysis algorithm indicators at home and abroad is becoming mature, but the Beidou ground-based augmentation system uses hardware equipment provided by many manufacturers, the observation environment is complex, and there is no effective data quality analysis method

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