GPS ionized layer TEC chromatographic method

A technology of ionosphere and electron concentration, applied in geophysical measurement, instruments, etc., can solve the problems of cumbersome calculation and unfavorable programming, and achieve the effect of high-efficiency tomographic calculation

Inactive Publication Date: 2013-12-18
HOHAI UNIV
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Problems solved by technology

The method aims at the problems that the traditional GPS ionospheric TEC tomography method is cumbersome to calculate and is not conducive to programming, and provides a n...

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  • GPS ionized layer TEC chromatographic method
  • GPS ionized layer TEC chromatographic method
  • GPS ionized layer TEC chromatographic method

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, a kind of GPS ionospheric TEC chromatography method that the present invention proposes is described in detail:

[0025] Such as figure 1 As shown, a GPS ionospheric TEC tomography method includes the following 7 steps:

[0026] 1. Download GPS data files, mainly including: observation data files (O files), and convert them into Rinex format; download SP3 precise ephemeris files corresponding to the observation period from the IGS website.

[0027] 2. Use the Lagrangian interpolation method to interpolate the coordinates of the satellite at any time.

[0028] 3. Detection and repair of GPS cycle slip.

[0029] 4. GPS phase smoothing pseudo-range.

[0030] 5. Calculate the TEC value of the total ionospheric electron concentration.

[0031] 6. Calculate the tomographic projection matrix;

[0032] 6.1 Determining the extent of the tomographic grid

[0033] Set the range of the tomographic grid as: longitude range (L 0 ...

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Abstract

The invention provides a GPS ionized layer TEC chromatographic method. According to the method, GPS observation data are obtained, the coordinate of a satellite at any moment is interpolated in the Lagrange interpolation method in comparison with a GPS precise ephemeris, the GPS cycle slip is detected and repaired, the GPS phase position smooth pseudo-range, a TEC value and a chromatographic projection matrix are calculated, and finally ionized layer TEC chromatography is performed. The GPS ionized layer TEC chromatographic method is a chromatographic projection matrix solving method based on the GPS observation data, and ionized layer TEC chromatography calculation is realized conveniently, rapidly and efficiently.

Description

technical field [0001] The invention belongs to the technical field of atmospheric observation, and specifically refers to a GPS ionospheric TEC tomography method. Background technique [0002] The ionosphere is the ionized part of the Earth's upper atmosphere, including the airspace in the Earth's upper atmosphere that extends from about 50 kilometers above the ground to about 1,000 kilometers. The ionosphere is a kind of weak ionized gas, in which there are quite a lot of free electrons and ions, which can change the propagation speed of electromagnetic waves, make electromagnetic waves refract, reflect and scatter, cause the rotation of the polarization plane and be absorbed in different degrees, thus It has a serious impact on short-wave communication, satellite communication and navigation and positioning. [0003] Total electron content (TEC), also known as ionospheric electron concentration column content, integral content, total electron content, etc., is the integr...

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Application Information

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IPC IPC(8): G01V9/00
Inventor 王新志岳东杰袁豹
Owner HOHAI UNIV
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