A Deblurring Method for Radial Velocity Field of Doppler Weather Radar

A radial velocity, weather radar technology, used in radio wave measurement systems, instruments, etc.

Active Publication Date: 2015-11-18
南京信大气象科学技术研究院有限公司
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Problems solved by technology

Since continuous noise will make the number of noise points in a certain area larger than the number of good points, the median filtering and local smoothing methods commonly used in deblurring methods are not only ineffective for continuous noise but also make it more continuous
In addition, the noise elimination method in the deblurring method will also delete a large number of non-noise points by mistake while eliminating continuous noise.
Therefore, such methods are more cautious in the application of deblurring algorithms, and their ability to suppress continuous noise is relatively limited.

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  • A Deblurring Method for Radial Velocity Field of Doppler Weather Radar
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  • A Deblurring Method for Radial Velocity Field of Doppler Weather Radar

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Embodiment Construction

[0016] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] The present invention is a three-dimensional velocity deblurring method. The non-destructive suppression scheme of "separation-restoration" noise consists of three steps: noise separation, curve deblurring, and noise restoration. figure 1 Is the method flow chart, where VAD is the abbreviation of VelocityAzimuthDisplay, which is a simple harmonic curve fitted along the tangential direction; MVAD is the abbreviation of ModifiedVAD, which is an improved VAD fitting curve. The first step of the method is noise separation. Three noise separation methods are designed, using strict thresholds to separate noise points. The second step is to deblur the curve. Using the method of three fitted curves, the residual noise is further suppressed during the deblurring process, and the multi-curve coordination technique is used to adapt to wind fields of different scales....

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Abstract

The invention discloses a retreating dim method of a Doppler weather radar radial velocity field and belongs to the field of weather radar data quality controlling. The method includes that firstly, a noise separation method is used for separating noise data from the radial velocity field; secondly, a multi-curve fitting method is used or dimming a retreating speed; thirdly, non-noise data which is deleted by mistake restored at an original position. The retreating dim method of the Doppler weather radar radial velocity field can directly improve the quality of the weather radar velocity field, indirectly improve the level of short-time nowcasting, meteorological disaster warning, weather modification and other business, and have high application value and application future.

Description

Technical field [0001] The invention involves a degeneration method of the Doppler weather thunder radiography, which is the field of meteorological radar data quality control. Background technique [0002] Speed field is one of the observation data obtained by the Doppler weather radar. It is widely used in the fields of short -term forecasting, meteorological disaster warning, artificially affect weather, numerical forecasting model and other fields.The radar obtains the radial speed by measuring the phase change between the neighboring pulses, and the speed range is ( ,, ),, It is the maximum non -vague speed.When the real speed value exceeds the speed range, it will be folded ( ,, ) Inside, the speed of error is generated, which is blurred.Variable speed is a problem of widespread weather radar, which seriously limits the application of speed field. [0003] Restore the measurement value into a real value, which is called the speed refund.Fascinating blurring can be achi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/32
Inventor 银燕楚志刚顾松山吴迪
Owner 南京信大气象科学技术研究院有限公司
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