Regional ionospheric TEC real-time monitoring method based on IGS and CORS

An ionospheric and regional technology, applied in the field of satellite navigation, can solve the problems of low spatial resolution and time resolution, low precision, and inability to make real-time corrections, so as to expand the range, improve accuracy and reliability, and improve accuracy Effect
CN110568459AActive Publication Date: 2019-12-13GUILIN UNIV OF ELECTRONIC TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN UNIV OF ELECTRONIC TECH
Publication Date
2019-12-13

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Abstract

The invention provides a regional ionospheric TEC (Total Electron Content) real-time monitoring method based on IGS (Internal GNSS Service) and CORSs (Continuously Operating Reference Station), whichcomprises the steps as follows: determining a monitoring region, and dividing the monitoring region into grids according to the size of the monitoring region; determining the longitude and latitude ofeach grid, and determining IGS tracking stations and CORSs participating in establishment of a regional ionospheric grid VTEC (Vertical Total Electron Content) model; reading the data of the IGS tracking stations, the original double-frequency observation data of the CORSs and a navigation message; preprocessing the observation data and the navigation message; calculating the position and elevation angle of a satellite and the longitude and latitude of a puncture point; smoothing a pseudo-range observation value; acquiring the DCB (Difference Code Bias) of the satellite and the DCB of a receiver; extracting the VTEC at the puncture point; carrying out Kriging spatial interpolation and analysis on the puncture point, and broadcasting the result to regional users in a grid form. According to the method, a regional ionospheric grid VTEC model is established by combining IGS and CORS data, the problems of precision reduction and the like caused by insufficiency of the IGS tracking stations are solved, the range of a monitoring region is expanded, and the precision and reliability of the ionospheric grid VTEC model in areas such as the equator are improved.
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Description

technical field

[0001] The invention belongs to the field of satellite navigation, and in particular relates to a real-time monitoring method for regional ionosphere TEC based on IGS and CORS stations. Background technique

[0002] The ionosphere is an atmospheric region at a height of 60-2000 km from the ground. The thin air is ionized by ultraviolet rays and X-rays to generate a large number of free electrons, forming plasma, which can cause differences in electromagnetic signals passing through it, including reflection, refraction, scattering and absorption. degree of influence. Ionospheric total electron content (Total Electron Contents, TEC) is one of the most important parameters to describe the characteristics and changes of the ionosphere. It has important application value and scientific significance to improve the positioning accuracy of GNSS and promote the development of theoretical research and engineering application of related science.

[0003] GNSS is one o...

Claims

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