Calculation method based on international reference ionosphere total electron content abnormal value correction

Abstract

The invention discloses a calculation method based on international reference ionosphere total electron content abnormal value correction, and relates to the field of space technology design. According to the technical scheme, an ionospheric TEC model is constructed based on GNSS actual measurement ionospheric TEC data, and regional regular grids are divided according to the ionospheric TEC model;areas which do not accord with international reference ionospheric constraints and have negative ionospheric TEC values in the missing positions of the actual measurement data are marked on the regular grids according to GNSS actual measurement ionospheric TEC data and an uncorrected ionospheric TEC model; and a TEC value at the grid mark position is solved by utilizing the international reference ionospheric model and the uncorrected ionospheric TEC model, and a corrected ionospheric TEC model is constructed. The method has the beneficial effects that the abnormal value in the ionospheric TEC model can be quickly and accurately processed based on the calculation method for correcting the abnormal value of the total electron content of the international reference ionosphere, and the method has important value for further obtaining the high-precision ionized layer TEC model and improving the ionized layer space environment monitoring level.

Description

technical field [0001] The invention belongs to the field of space technology design, and in particular relates to a calculation method based on the correction of the abnormal value of the total electron content of the ionosphere based on an international reference. Background technique [0002] The total electron content (TEC) of the ionosphere is one of the most important parameters describing the structure, state and changes of the ionosphere. Due to the uneven distribution of GNSS ground reference stations, the global ionospheric TEC model constructed by GNSS-TEC cannot express the total electron content of the ionosphere well in areas lacking observation data, and reducing TEC outliers in areas lacking observation data can effectively Improve the accuracy of ionospheric models. Therefore, solving the problem of ionospheric TEC outliers is an indispensable step in conducting ionospheric research. [0003] GNSS stations are rarely deployed in the ocean, Africa, and the ...

AI Technical Summary

Problems solved by technology

Both of the above two types of methods have certain limitations. The first type of method relies on the accuracy of the calculated TEC value at the location where the measured data is missing. If the calculated TEC value cannot accurately describe the actual TEC value, the distribution of the ionospheric TEC model at the observation station Sparse regions still have large outliers

The second type of method has the problem of slow solution speed when there are many outliers, and cannot meet the needs of practical engineering applications

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