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Dual-polarization Doppler weather radar ground clutter inhibition method based on fuzzy logic

A technology for ground clutter and weather radar, applied in the field of remote sensing, which can solve the problems of unsuppressed, over-suppressed, increased algorithm complexity and computational load, etc.

Inactive Publication Date: 2016-05-04
PLA UNIV OF SCI & TECH
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Problems solved by technology

But its step-by-step method increases the complexity and computation of the algorithm
With a one-step approach, under-suppression or over-suppression occurs at certain threshold conditions

Method used

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  • Dual-polarization Doppler weather radar ground clutter inhibition method based on fuzzy logic
  • Dual-polarization Doppler weather radar ground clutter inhibition method based on fuzzy logic
  • Dual-polarization Doppler weather radar ground clutter inhibition method based on fuzzy logic

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Embodiment Construction

[0061] The present invention provides a dual polarization Doppler weather radar surface clutter suppression method based on fuzzy logic, combined with the attached figure 1, the method of the present invention is specifically:

[0062] 1. Data and processing

[0063] Use the linear interpolation method to interpolate irregular radar volume scan data into Z, V, SW, ZDR, KDP, PHV data of regular 360 radial lines, and the symbols represent echo intensity, average Doppler velocity, and spectral width respectively , differential reflectivity factor, differential propagation phase shift and correlation coefficient.

[0064] 2. Fuzzy processing

[0065] According to the formulas (1) to (7), set 7 physical quantities, that is, the radial change of echo intensity, the azimuth change of echo intensity, the regional variance of average Doppler velocity, the average value of spectrum width, and the average value of differential reflectivity factor , the average value of the differentia...

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Abstract

The invention discloses a dual-polarization Doppler weather radar ground clutter inhibition method based on fuzzy logic, and the method comprises the steps: processing volume scanning data of a dual-polarization Doppler weather radar into 360 radial lines, wherein the interval between each two adjacent radial lines is one degree, and the data of each radial line comprises seven echo characteristic physical quantities: intensity, a mean Doppler speed, a spectrum width, a difference reflectivity factor, a difference propagation phase shift, and a correlation coefficient; setting the seven physical quantities which respectively comprise the intensity, the mean Doppler speed, the spectrum width, the difference reflectivity factor, the difference propagation phase shift, and the correlation coefficient; enabling seven fuzzy results to be assigned with corresponding weight values, carrying out accumulating and obtaining a ground clutter criterion of one echo point; Determining that the intensity echo of the point is the ground clutter when the ground clutter criterion of one echo point is greater than a threshold value; inhibiting the ground clutter of the dual-polarization Doppler weather radar through the ground clutter criterion of each echo point, and compensating a hole of a current layer after clutter inhibiting through employing the echo intensity value of a corresponding point in an upper layer in the volume scanning data.

Description

technical field [0001] The invention belongs to the technical field of remote sensing, and relates to a dual-polarization Doppler weather radar ground object clutter suppression method based on fuzzy logic. Background technique [0002] Strong ground clutter often appears at low elevation angles during weather radar volume scanning, making it difficult to accurately guide quantitative precipitation forecasts and predict hazardous weather based on radar reflectivity data. Compared with conventional Doppler weather radar, dual polarization Doppler weather radar can detect the polarization, phase state, shape and other information of particles, so it has been widely used. The differential reflectivity factor, differential propagation phase shift, correlation coefficient and other information detected by dual polarization Doppler weather radar can also fully reflect the detected ground object information. Application The strength, speed and spectral width information of conven...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/417
Inventor 黄云仙杨文强马烁马宁张鹏艾未华赵现斌
Owner PLA UNIV OF SCI & TECH
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