Satellite positioning carrier phase difference method

Abstract

The invention provides a satellite positioning carrier phase difference method, which comprises the following steps of: acquiring the non-differential error correction number of the carrier phase observed value of each satellite of each reference station by utilizing the observed data of a reference station network; calculating to obtain the error correction number of the non-differential carrier phase observed value of each satellite at a user station according to the non-differential error correction number of the carrier phase observed value of each satellite at the selected reference station, wherein the non-differential error correction number of each satellite includes various observation error influences and ambiguity information of the carrier phase observed value; and carrying out the high-precision carrier phase positioning of the user station by utilizing the error correction number of the non-differential carrier phase observed value of each satellite at the user station.

Description

technical field [0001] The invention relates to the field of computer applications, in particular to a carrier phase difference method for satellite positioning. Background technique [0002] Network RTK (Real-Time Kinematic) is to deploy multiple (generally at least three) reference stations in a certain area to form a mesh coverage of the area, and use all or part of the reference station data to estimate the satellite positioning of the area or the user The error information generates differential information, and the real-time user receives the differential information and performs ambiguity processing and resolution of the carrier phase to obtain real-time high-precision three-dimensional position information of the user. It can provide users with centimeter-level real-time high-precision three-dimensional positions in a wide range. Compared with traditional RTK technology, network RTK has higher stability, availability and cost-effectiveness. Its biggest advantage is ...

AI Technical Summary

Problems solved by technology

At present, network RTK technology is generally based on the double-difference model. The advantage of double-difference combination is that it can well eliminate system errors with strong correlation, such as satellite clock error and receiver clock error. For tropospheric delay, ionospheric delay The systematic error that the correlation is not very strong also has obvious elimination effect, but the elimination effect will be weakened with the increase of the distance between stations

The disadvantage is that the system error has been combined and eliminated by double difference, so it is difficult to analyze the system error; and from non-difference to single difference, and then to double difference, this process is irreversible, or this inverse process is difficult to achieve, so it is determined The compatibility of the double-difference mode is poor. For example, the correction number of double-difference can only be used for double-difference users, and it is difficult to be used for single-difference or non-difference users. In addition, the double-difference mode needs to select a main reference station for double-difference combination , when the user is constantly moving, the reference station may need to change constantly, which will cause troubles in data processing and inconsistencies in differential correction information between different subnets

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