Unlock instant, AI-driven research and patent intelligence for your innovation.

Troposphere chromatography method involving water vapor space-time parameters

A spatiotemporal parameter, troposphere technology, applied in special data processing applications, instruments, climate sustainability, etc., can solve the problem of insufficient accuracy of interpolation methods, and achieve to improve the accuracy of tomographic modeling and tomographic solutions. definite effect

Active Publication Date: 2020-12-15
CENT SOUTH UNIV
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Based on the parametric tropospheric tomography model, the present invention develops an improved tropospheric tomography parameterization method for the problem of insufficient precision of its interpolation method, in which the wet refractive index varies with the spatial position and its value is determined by the voxel The weighted sum interpolation of the eight nodes is obtained, the horizontal direction adopts inverse distance weighted interpolation, and the vertical direction adopts exponential interpolation, and the parameters required by the interpolation method are obtained according to the real-time estimation of the tomographic wet refractive index field

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Troposphere chromatography method involving water vapor space-time parameters
  • Troposphere chromatography method involving water vapor space-time parameters
  • Troposphere chromatography method involving water vapor space-time parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] According to the spatial variation characteristics of water vapor, the present invention obtains the wet refractive index of any point on the troposphere space from the weighted summation of the eight nodes of the voxel where it is located. The horizontal direction adopts inverse distance weighted interpolation, and the vertical direction adopts exponential interpolation. The required parameters are obtained according to the dynamic estimation of the tomographic wet refractivity field, which overcomes the defect of not considering the space-time parameters of water vapor in previous modeling, and refines the parameterized tropospheric tomography model. Its principle and process are as follows:

[0044] Along the ray path from the GNSS satellite to the receiver, SWD and wet refractive index N w The relationship between them can be expressed as:

[0045] SWD = ∫ l N w d l (1)

[0046] Such as figure 1 As shown, l is the oblique path in SWD. Based on the spatially...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a troposphere chromatography method involving water vapor space-time parameters. The troposphere chromatography method is characterized in that a wet refractive index changes along with a spatial position, the value of the wet refractive index is obtained by carrying out weighted summation interpolation of eight nodes of a voxel where the wet refractive index is located, inverse distance weighted interpolation is adopted in the horizontal direction, exponential interpolation is adopted in the vertical direction, and parameters required by an interpolation method are acquired according to real-time estimation of a chromatography wet refractive index field. On the basis of an existing parameterized chromatography model, the troposphere chromatography method improves the chromatography modeling precision through adopting a refined parameterized chromatography model interpolation method. Particularly, when grid division is large or water vapor space changes drastically, the improved parameterization method provided by the invention can construct the tropospheric chromatography model more accurately.

Description

technical field [0001] The invention relates to the field of geophysics, in particular to a tropospheric tomography method involving water vapor spatiotemporal parameters. Background technique [0002] The troposphere is the layer of atmosphere closest to the earth's surface, and it is also the densest layer in the earth's atmosphere, containing about 75% of the mass of the entire atmosphere, as well as almost all water vapor and aerosols. Tropospheric tomography is an inversion calculation based on the wet delay information obtained by ray scanning, and reconstructs a three-dimensional image of the distribution of wet refractive index within the measured troposphere. Among them, the wet delay means that when the electromagnetic wave signal passes through the troposphere, its signal is bent by the refraction of water vapor, and the propagation path becomes longer than the geometric distance, so the propagation speed becomes slower. This is called the delay of the electromagn...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/37G01W1/00G06F30/20
CPCG01S19/37G01W1/00G06F30/20Y02A90/10
Inventor 陈必焰
Owner CENT SOUTH UNIV