X-band weather radar and rainfall station data fusion method and system

A weather radar and data fusion technology, used in radio wave measurement systems, meteorology, rainfall/precipitation scales, etc. Improve the estimation accuracy, the spatial structure distribution is reasonable, and the continuity is good.

Active Publication Date: 2018-11-06
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +1
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Problems solved by technology

This type of method can improve the accuracy of precipitation estimation to a certain extent, but it also has many shortcomings: different types of precipitation, the accuracy of precipitation estimation after data fusion is unstable and the accuracy is not greatly improved, and the spatial structure of precipitation after data fusion is unreasonable, etc. Moreover, most of these methods are used in S-band and C-band weather radars, but not in X-band weather radars
As short-term nowcasting reference information, the input information of the weather forecast and early warning model and the surface precipitation with large errors have seriously affected the accuracy of the early warning and forecast

Method used

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  • X-band weather radar and rainfall station data fusion method and system
  • X-band weather radar and rainfall station data fusion method and system
  • X-band weather radar and rainfall station data fusion method and system

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Experimental program
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Effect test

Embodiment 1

[0097] From 19:00 on May 13, 2015 to 01:00 on May 14, 2015, the Jiangxi Nanchang X-band weather radar system collected a rainstorm process, with a total of 84 PPI data.

[0098] Table 1 Evaluation of each fusion method

[0099]

Embodiment 2

[0101] From 19:00 on May 25, 2015 to 09:00 on May 26, 2015, the X-band weather radar system in Ganzhou, Jiangxi Province collected a rainstorm process with a total of 168 PPI data.

[0102] Table 2 Evaluation of each fusion method

[0103]

[0104] figure 1 with image 3 (a) in (a) is the original radar rainfall, and the original radar rainfall is affected by rain attenuation, figure 1 In (a) the precipitation in the upper left corner is obviously weaker after the precipitation, and the precipitation center in the lower right corner is directly attenuated. image 3 The precipitation center in the lower half of middle (a) is generally weak. figure 1 with image 3 The (b) in (b) is the rainfall after the fusion of the average method, as shown in the rainfall distribution in the "ellipse". figure 1 In (b) the overall rainfall is overestimated, image 3 In (b) the overall rainfall is underestimated, and the precipitation accuracy is unstable after fusion. figure 1 with ...

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Abstract

The invention discloses an X-band weather radar and rainfall station data fusion method and system. The method comprises a step of acquiring rainfall station rainfall data measured by the rainfall stations covered by a whole detection area of a meteorological radar, a step of acquiring radar echo intensity data generated by the meteorological radar and latticing the radar echo intensity data toobtain lattice point echo intensity data, a step of inverting the lattice point echo intensity data into lattice point rain intensity data and obtaining original lattice point rainfall data in a wholerainfall process through a linear average accumulation method, a step of searching rainfall stations in a certain range with a lattice point as a center and calculating a distance weight coefficientof the grid point based on the distance between the grid point and a searched rainfall station, and a step of fusing the rainfall station rainfall data of measured by the rainfall stations to the original lattice point rainfall data of the lattice point with the combination of the distance weight coefficient to obtain grid rainfall data after the grid fusion. According to the system, a distance weight coefficient fusion method is used to improve the estimation accuracy of the regional rainfall.

Description

technical field [0001] The invention relates to the technical field of multi-meteorological element fusion processing, in particular to a data fusion method of an X-band weather radar and a rainfall station. Background technique [0002] As a new type of active remote sensing equipment for meteorological detection, X-band meteorological radar has the ability to estimate in real time the intensity of precipitation echoes at various points within its detection range and the distribution of precipitation range in a certain area, so it can obtain timely data with better spatial continuity and a larger range. Quantitative precipitation data. When X-band radar detects local weather processes, the spatial resolution and continuity of precipitation information are better than those of S- and C-band weather radars. Therefore, it is of great significance for early warning and forecasting of small and medium river floods, urban waterlogging, and geological disasters in the monitoring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14G01S13/95
CPCG01S13/95G01W1/14Y02A90/10
Inventor 刘宏王天正晋涛俞华芦山王欣伟李慧勇张秋实闫忠凯
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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