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A Simulation Method of Dual-polarization Weather Radar Echo Signals

An echo signal and weather radar technology, which is applied in the field of dual-polarization weather radar echo signal simulation, can solve the problem that no echo signal is established, the dual-channel echo signal cannot be simulated, and the dual-polarization weather radar radar system performance evaluation cannot be applied. problems, to reduce production and design costs and improve test efficiency

Active Publication Date: 2022-04-08
CHENGDU UNIV OF INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot simulate the dual-channel echo signal of dual-polarization weather radar, does not establish the relationship between the echo signal and the parameters of the dual-polarization weather radar system, does not consider the different characteristics of the working mode in the volume scan, and cannot simulate the weather radar volume scan process Echo characteristics of each scan mode in
[0006] Existing methods cannot be applied to radar system performance evaluation, new algorithm verification and analysis, scanning strategy analysis and other fields of dual polarization weather radar

Method used

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  • A Simulation Method of Dual-polarization Weather Radar Echo Signals
  • A Simulation Method of Dual-polarization Weather Radar Echo Signals
  • A Simulation Method of Dual-polarization Weather Radar Echo Signals

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Embodiment 1

[0100] This embodiment is a simulation method for dual-polarization weather radar echo signals. For the simulation process, see figure 1 . In order to realize the dual polarization echo signal simulation of a single target point, the specific steps are as follows:

[0101] (1) Read base data, read reflectance ,speed , spectral width , differential reflectivity , differential phase , correlation coefficient Six kinds of data, or set it yourself, prepare data for the formula in this embodiment;

[0102] (2) According to the simulation needs, set the predetermined radar system parameters etc., prepare data for the formula in this embodiment;

[0103] (3) Substitute the above parameters into the horizontal channel echo signal power calculation method and the vertical channel echo signal power calculation method to obtain the echo power and , and then and Substituting into the power spectrum calculation method and the complex spectrum model calculation metho...

Embodiment 2

[0106] This embodiment is a method for simulating echo signals of a dual-polarization weather radar for all target points at one elevation angle. For the reflectivity factor PPI diagram in the actual weather process, please refer to Figure 4 , the speed PPI diagram in the actual weather process see Figure 5 , for the spectrum width PPI map in the actual weather process see Figure 6 , the differential reflectance PPI map in the actual weather process see Figure 7 , the differential phase PPI diagram in the actual weather process see Figure 8 . In order to realize the dual-polarization echo signal simulation of all target points at an elevation angle, firstly execute the steps of Example 1 cyclically for all targets within the elevation angle, and then complete the dual-polarization echo signal simulation of all target points at an elevation angle.

[0107] Taking the basic data of a C-band dual-polarization weather radar as an example, simulate the echoes of all target...

Embodiment 3

[0109] This embodiment is a simulation of dual-polarization radar echo signals in different volume scan modes. Firstly, the dual-polarization weather radar echo signals in CS mode are simulated, and other modes are simulated based on this.

[0110] In CS mode, take the pulse repetition frequency during simulation: , the maximum unambiguous speed at this time , and other system parameters are consistent with the parameters in the specific embodiment (1). For the echo data used in embodiment (1), the pulse repetition frequency at this time: , the maximum unambiguous velocity at this time . Therefore, in CS mode, it is necessary to The scatterers are simulated with velocity ambiguity. For example, select the reflectivity factor in the actual weather radar data: ; Doppler velocity: ;Spectral width: ;Differential reflectivity factor: ; Differential phase: ;Zero-lag correlation coefficient: . Due to the speed at this time , so it is necessary to do speed fuz...

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Abstract

The invention relates to the technical field of radar simulation, in particular to a dual-polarization weather radar echo signal simulation method. The simulation method includes a dual-polarization weather radar echo signal simulation method and a dual-polarization radar volume-scan mode echo signal simulation method. The steps of the dual-polarization weather radar echo signal simulation method are as follows: obtain the echo signal power of the horizontal and vertical channels of the dual-polarization weather radar; carry out complex spectrum modeling of the echo signals of the horizontal and vertical channels, and establish the horizontal and vertical channels. Phase difference, intensity difference, and correlation of echo signals; generate time-domain I / Q echo signals based on two quadrature signals; analog receiver horizontal and vertical channel echo signal noise and channel gain. The dual-polarization weather radar echo signal simulation method establishes the relationship between the dual-polarization weather radar system performance parameters and the echo signal, and can simulate the influence of radar performance parameters on radar observations.

Description

technical field [0001] The invention relates to the technical field of radar simulation, in particular to a simulation method for dual-polarization weather radar echo signals. Background technique [0002] Dual polarization weather radar is currently one of the most widely used and effective tools for monitoring and early warning of disastrous weather. The main advantage of dual-polarization weather radar is that in addition to obtaining the intensity and speed information of the rainfall process, it can also invert the microphysical structure of rainfall such as the form and phase state through the polarization information obtained by detection, so as to provide quantitative measurement of rainfall, disaster The early warning of severe weather provides a rich data base. [0003] With the rapid development of meteorological services towards refinement and precision, higher requirements are put forward for the system performance, processing algorithm improvement and scanning...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 李学华代少君步志超陈玉宝邵楠何建新唐顺仙王旭熊茂杰关宇
Owner CHENGDU UNIV OF INFORMATION TECH
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