High-precision baseline resolving method by use of multisystem GNSS observed values

Abstract

The invention discloses a high-precision baseline resolving method by use of multisystem GNSS observed values. First of all, inter-station single-difference observed values are constructed by performing subtraction between stations at the two sides of a baseline on a pseudo range and a carrier wave phase observed value of each frequency of each GNSS system, afterwards, the rank defect problem of a normal equation is solved by taking a pseudo range hardware delay of a certain type of observed values as a reference, influences of a combined UPD are removed by performing estimation processing on floating point single-difference fuzziness according to the property of each GNSS system, an integer cycle characteristic of the single-difference fuzziness is recovered, and thus high-precision resolving of the baseline is realized. According to the invention, the defects existing in a conventional multisystem GNSS baseline resolving method are solved, and the method has the advantages of rigorous theory, simple model, easy realization, high expandability, high precision and the like, thereby being applied to multiple fields such as geological disaster monitoring, structure object deformation monitoring, precision navigation and the like.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation, and in particular relates to a method for calculating a high-precision baseline by using observation data of multiple global navigation satellite systems (Global Navigation Satellite System, GNSS). Background technique [0002] In view of the great advantages of GPS (Global Positioning System) in the military and civilian fields, many countries and organizations in the world have begun to build independent global navigation satellite systems. The GNSSs that have been built or are under construction include GPS in the United States, GLONASS (GLObalnaya NAvigatsionnaya Sputnikovaya Sistema) in Russia, Galileo in the European Union and BDS (BeiDou Navigation Satellite System) in China. A large number of studies have shown that comprehensively utilizing the signals of multiple GNSS systems and uniformly processing the observation data of different systems at the observation value level c...

AI Technical Summary

Problems solved by technology

When using multi-system GNSS data for baseline calculation, the influence of inter-system deviation and inter-frequency deviation must be taken into account, which makes the baseline calculation model more complicated, and because the frequencies of different systems are generally inconsistent, resulting in double-difference ambiguity between different systems The ambiguity does not have the characteristics of the whole cycle, and the ambiguity cannot be fixed directly.

The above problems seriously limit the full play of the advantages of multi-system

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