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

A technology of total electron content and calculation method, which is applied in the field of calculation based on the correction of abnormal value of total electron content of the international reference ionosphere, can solve the problems of abnormal value, slow solution speed, and lack of accuracy in the ionospheric TEC model, and improve the ionospheric TEC model. The effect of level space environmental monitoring

Active Publication Date: 2020-05-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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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

Method used

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

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Embodiment Construction

[0027] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0028] Taking the measured data of global GNSS observation stations at a certain moment as an example, the distribution of the measured data is as follows: figure 1 As shown, the data are irregularly distributed in the range of -180°-180° longitude and -90°-90° latitude, and the minimum spatial resolution of longitude and latitude is 1°×1°.

[0029] Step 1: Construct the ionospheric TEC model based on the GNSS measured ionospheric TEC data. The uncorrected ionospheric TEC map is as follows figure 2 As shown, the longitude-latitude spatial resolution is divided into a regular grid of 5°×2.5°.

[0030] Step 2: According to the GNSS measured ionospheric TEC data, the positions of the missing data marked on the regional...

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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 ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/07
CPCG01S19/07Y02A90/10
Inventor 熊波李肖霖
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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