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X-band dual-polarization weather radar precipitation estimation method

A weather radar and dual-polarization technology, applied in the field of comprehensive wavelet denoising and filtering, to achieve the effect of improving accuracy and avoiding influence

Inactive Publication Date: 2018-09-21
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

[0025] The technical problem to be solved by the present invention is to provide an X-band dual-polarization weather radar precipitation estimation method, by providing a superior X-band co-polarization differential phase shift data filtering method to solve K DP Estimate quality issues to improve precipitation estimation accuracy

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Embodiment 1

[0097]This embodiment selects the detection data of the 714XDP-A vehicle-mounted X-band dual-linear polarization Doppler weather radar at 19:50 (BJT) on August 7, 2015 at an elevation angle of 5° in Shunyi, Beijing (40.18°N, 116.68°E). The specific steps of the precipitation estimation method for X-band dual-polarization weather radar are as follows:

[0098] First, the original Ψ near the radar C According to the data, the co-polarization differential phase shift data in the six radial distance libraries (0.9km) of the headquarters radar is extremely unstable, so it can be ignored.

[0099] (1) Data identification method:

[0100] (11) From the 7th radial distance library to Ψ C Calculate the radial distance library increment (TΨ C ), where the radial distance library increment of the 7th distance library is determined by Ψ on the library C Subtract the initial effective differential propagation phase shift (starting from the radar and searching outward along the radial d...

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Abstract

The invention discloses an X-band dual-polarization weather radar precipitation estimation method, and relates to a superior integrated wavelet denoising filtering method so as to enhance the phiDP quality and enhance the KDP quality and finally enhance the precipitation estimation accuracy. Three steps of data identification, successive correction and wavelet denoising (called integrated waveletdenoising) are performed on the psiC to acquire the high-quality phiDP, then the KDP is estimated by using the phiDP, and finally precipitation estimation is performed by using the improved KDP through the precipitation estimation equation IDK (KDP, ZDR). The critical point of the whole process is to enhance the phiDP quality from the filtering method so as to enhance the precipitation estimationaccuracy.

Description

technical field [0001] The invention belongs to the field of atmospheric science, and in particular relates to a comprehensive wavelet denoising filtering method for a superior X-band dual-polarization weather radar co-polarization differential phase-shift data, to improve Φ DP quality, thereby increasing K DP quality, and ultimately improve the accuracy of X-band dual-polarization weather radar precipitation estimation. Background technique [0002] Polarization Parameter Differential Propagation Phase Shift Rate K of X-band Dual Polarization Doppler Radar DP Because of its special performance (insensitive to changes in droplet spectrum distribution and insensitive to electromagnetic wave attenuation), it is considered to be an excellent estimator for precipitation estimation. [0003] Precipitation estimation: There are four rain measurement equations for X-band dual polarization Doppler radar applied to precipitation estimation: [0004] [0005] [0006] [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95
CPCG01S13/956Y02A90/10
Inventor 周筠珺赵川鸿
Owner CHENGDU UNIV OF INFORMATION TECH
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