Method and system for solving velocity ambiguity of Doppler weather radar

Abstract

The invention provides a Doppler weather radar velocity ambiguity resolving method and a Doppler weather radar velocity ambiguity resolving system. The method comprises the following steps: S1, transmitting a first pulse signal and a second pulse signal to a movement meteorological target simultaneously through a Doppler weather radar, and receiving a first echo signal which is reflected after thefirst pulse signal acts with the movement meteorological target as well as a second echo signal which is reflected after the second pulse signal acts with the movement meteorological target, whereinthe pulse repetition periods of the first pulse signal and the second pulse signal are the same; S2, synthesizing the first echo signal and the second echo signal to acquire a synthetic signal; and S3, acquiring the Doppler central frequency of the synthetic signal and acquiring the average radial average velocity of the movement meteorological target without velocity ambiguity on the basis of theDoppler central frequency. The equivalent wavelength amplitude is increased through the synthetic signal, the Doppler central frequency of the target in the synthetic signal is reduced and the Doppler central frequency ambiguity caused by velocity ambiguity is removed.

Description

Technical field [0001] The present invention relates to the technical field of weather radar, and more specifically, to a method and system for solving velocity ambiguity of Doppler weather radar. Background technique [0002] Pulse Doppler weather radar is a kind of radar that uses the Doppler effect formed by the relative movement of the radar and the cloud, rain and other scatterer targets for weather detection. It has the function of detecting the position and intensity of the precipitation echo by conventional weather radar At the same time, the Doppler principle can be used to obtain the estimated average radial motion velocity and velocity spectrum width of the precipitation particles in the effective irradiation volume of the radar signal, which can further invert the atmospheric wind field, the distribution of the vertical velocity of the airflow, and the turbulence conditions, etc. Disastrous weather warnings such as tornado cyclones, severe storm circulation, heavy sno...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a Doppler meteorological radar speed ambiguity solution method and system that overcomes the above problems or at least partially solves the above problems, and solves the problems caused by symmetrical sidelobes on both sides of the center of the weak echo spectrum in the prior art. The problem of inaccurate estimation of the spectral width of

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