An ionospheric tomography method based on vertical survey data constraints

Abstract

The invention discloses an ionospheric tomography method based on vertical survey data constraints, comprising the following steps: step A, reconstruction of characteristic parameters of the F2 layer of the background ionospheric model based on vertical survey data; step B, ground-based GNSS ionospheric tilt Calculation of total electron content: step C, construction of ionospheric tomography inversion matrix: The ionospheric tomography method based on vertical survey data constraints disclosed in the present invention uses ionospheric vertical survey data and The ground-based GNSS observation data released by the International GNSS Service (IGS) is used as the data source of ionospheric tomography. For the electron content data, the background ionospheric model is corrected by using the improved multiplicative algebraic iterative algorithm to realize regional and even global ionospheric tomography, so as to obtain the temporal and spatial variation characteristics of the total electron content and electron density of the ionosphere.

Description

technical field [0001] The invention belongs to the field of space ionospheric environment monitoring, in particular to an ionospheric tomography method based on vertical survey data constraints in the field. Background technique [0002] As an important part of the sun-terrestrial space environment, the ionosphere will have effects such as refraction, reflection, scattering and absorption of radio waves passing through it, thus affecting the performance of many radio information systems such as satellite navigation, communication, and radar. Using various technical means to obtain the characteristic parameters of the ionosphere, to study various phenomena in the ionosphere, and to reveal the physical mechanism behind it has important scientific and even political, military and economic significance. Among the many characteristic parameters of the ionosphere, the ionosphere electron density is the most critical detection parameter, and the mastery of its spatio-temporal vari...

AI Technical Summary

Problems solved by technology

Especially due to the high orbital height of GNSS satellites, for a specific area, the ray paths corresponding to most of the observation data are nearly vertical compared with the CT imaging grid. According to the theory of ionospheric tomography, This will result in lower vertical resolution achieved by ground-based GNSS imaging, that is, less accurate retrieval of ionospheric peaks

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