Method and system for meteorological-radar signal processing

Abstract

The invention provides a method and system for meteorological-radar signal processing. The method for the meteorological-radar signal processing includes the following steps: an emission step used for emitting main wave beams of radar waves to a target area through an antenna, wherein the main wave beams have a preset irradiation power, a preset wave-beam width and pulses of a preset number and each pulse has a preset pulse width and a preset irradiation power; a receiving step used for receiving return waves from the target area through an antenna; and a return-wave processing step used for processing the return waves so as to obtain a meteorological-radar signal which includes the return-wave power of the return waves and information related with the azimuth, pitch angle and distance of the target area, wherein the main wave beams are divided equally into n sub wave beams according to the angle of the azimuth and / or the main wave beams are divided equally into q sub wave beams according to the angle of the pitch angle and / or each pulse is divided equally into m sub pulses according to the pulse width so as to explore the target area so that the meteorological-radar signal of super resolution is obtained.

Description

technical field [0001] The invention relates to the field of weather radar, in particular to a method and system for processing weather radar signals. Background technique [0002] Weather radar is a radar device used to detect the type of precipitation (rain, snow, hail, etc.), distribution, movement and evolution in the atmosphere, and to predict its future distribution and intensity. In recent years, with the change of climate and environment, especially the increase of disastrous weather, the application of weather radar has become more and more important. [0003] Figure 15 A schematic diagram of the weather radar detection target area is shown. [0004] Such as Figure 15 As shown, in weather radar applications, the position of any target in space can be determined by the following three coordinates: [0005] (1) Distance R: the straight-line distance OP from the radar to the target; [0006] (2) Azimuth α: the angle between the projection OB of the distance R on t...

AI Technical Summary

Problems solved by technology

For example, if the main beam of the radar wave of a weather radar has a beamwidth of 3dB and the pulses within the main beam have a pulsewidth of 1ms, the resolution of the azimuth and elevation angles of the target area is limited by this 3dB beamwidth and the distance The resolution is limited by the 1ms pulse width, so it cannot be improved

[0009] Moreover, the existing weather radar signal processing system cannot process the information related to the azimuth angle, elevation angle and distance detected by the weather radar to obtain super-resolution high-precision data. The resolution of the processed data exceeds the resolution of the echo signal limited by beam width and pulse width

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