Method for processing non-meteorological noise in radar echoes

A radar echo and meteorological clutter technology, which is used in the reflection/re-radiation of radio waves, climate sustainability, radio wave measurement systems, etc. It can solve the problems of visual product impact and inability to effectively remove clutter.

Inactive Publication Date: 2010-05-12
宁波市气象服务中心
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Problems solved by technology

All these methods use the characteristics of non-meteorological echoes in the derived visualization products, and through the design of reasonable algorithms, real-time supplementary processing and filtering are carried out from the software. However, there are not many researches in this area in China at present. , on the other hand, whether these methods apply chaos theory or neural network, they only remove the clutter. When the clutter is mixed in the precipitation area, or the clutter is adjacent to the

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  • Method for processing non-meteorological noise in radar echoes
  • Method for processing non-meteorological noise in radar echoes

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.

[0025] The radar data uses the radar base data in polar coordinate format. The radar base data of the radar echo includes the reflectance factor value, the radial velocity value and the spectral width value. However, there are usually non-meteorological clutter in the radar return. Non-meteorological clutter is filtered out, but when filtering non-meteorological clutter, normal precipitation echo may be filtered out by mistake. In order to avoid erroneous filtering of precipitation echo, the present invention proposes a radar echo that contains non-meteorological clutter. As for the wave processing method, the method of the present invention can obtain a better filtering effect.

[0026] The processing flow of the method of the present invention is as follows figure 1 As shown, the specific steps are as follows:

[0027] ① A simple classification of radar e...

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Abstract

The invention discloses a method for non-meteorological noise in radar echoes, which comprises the steps of: identifying noise areas existing on an 1.5 DEG elevation plane and an 0.5 DEG elevation plane by simply classifying the radar echoes, then analyzing reflectivity factor values of the echoes and then orderly referring radial velocity values and spectrum width values; performing a best noise rejection strategy on different noises after the noise areas are correctly identified; directly adopting a rejection strategy for noises under the conditions of clear sky and no precipitation echoes at peripheries; and adopting an approximate value filling mechanism for noises which are mixed in the precipitation echoes or are adjacent to the precipitation echoes so as to achieve better rejection effect.

Description

Technical field [0001] The invention relates to a method for processing radar echoes, in particular to a method for processing non-meteorological clutter in radar echoes. Background technique [0002] Doppler weather radar uses the backscattering of electromagnetic waves by cloud and rain targets to find meteorological targets, and determine the spatial position and strength distribution of meteorological targets, so as to understand the generation and disappearance, evolution, and moving speed of precipitation. But Doppler weather radar can also detect non-meteorological targets. When non-meteorological targets are processed into the radar base data, they will cause clutter pollution. Non-meteorological targets are non-meteorological clutter. Non-meteorological clutter includes ground clutter and isolated points and speckle noise clutter. Waves include common ground clutter NP and transient clutter AP caused by the abnormal propagation of radar beams when the radar beam is prop...

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Application Information

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IPC IPC(8): G01S7/41G01S13/95
CPCY02A90/10
Inventor 黄旋旋
Owner 宁波市气象服务中心
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