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Improved algorithm of radar-rain gauge combined estimation of rainfall acquiring boundary condition based on minimum functional

A technology of boundary conditions and improved algorithms, applied in the direction of rainfall/precipitation gauges, measuring devices, weather condition forecasting, etc., can solve problems such as errors and low precision of precipitation estimation results, and achieve the effect of avoiding errors and accurate rainfall estimates

Active Publication Date: 2020-05-01
江苏省气象科学研究所
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method introduces errors, resulting in inaccurate precipitation estimates

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  • Improved algorithm of radar-rain gauge combined estimation of rainfall acquiring boundary condition based on minimum functional
  • Improved algorithm of radar-rain gauge combined estimation of rainfall acquiring boundary condition based on minimum functional
  • Improved algorithm of radar-rain gauge combined estimation of rainfall acquiring boundary condition based on minimum functional

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0026] combine figure 1 The flow process of the present invention is described in detail below:

[0027] In the circular area with the center of the radar as the center, according to the statistical relationship between the classic radar reflectivity Z and the rainfall intensity I Z=AI b (Generally A=296, b=1.24 in our country), get the radar fitting rainfall at each point. At the same time, in this area, the precipitation directly observed by the rain gauge is denoted...

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Abstract

The invention discloses an improved algorithm of radar-rain gauge combined estimation of rainfall acquiring a boundary condition based on a minimum functional. The method utilizes the minimum functional of a large amount of known rain gauge observation data inside a radar scanning area and a formal solution of a variational equation to solve a complete boundary condition of a radar scanning circlearea, and then solve a variational method, thereby avoiding an error introduced by an assumed boundary condition, and achieving a more perfect theory.

Description

technical field [0001] The invention belongs to the technical field of weather forecasting, and in particular relates to a method for realizing precipitation estimation in a region by combining weather radar with ground rain gauge observation. Background technique [0002] The combination of weather radar and surface rain gauges for surface precipitation estimation is a common problem in meteorological and hydrological operations. The existing technology is based on the statistical relationship between the radar reflectivity intensity and the rainfall intensity, and the rainfall at each point within the radar scanning range is obtained by fitting; a certain mathematical method (usually a variational method) is used to compare the observation results of the ground rain gauge The radar is calibrated by fitting the precipitation results to obtain calibrated large-scale precipitation results. [0003] In the radar-rain gauge joint fitting precipitation using the variational met...

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Application Information

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IPC IPC(8): G01W1/10G01W1/14G01S13/95
CPCG01S13/958G01W1/10G01W1/14Y02A90/10
Inventor 慕熙昱刘国庆郑媛媛程浩徐芬孙康远
Owner 江苏省气象科学研究所