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Precipitation strong center tracking and prediction method of rainfall radar

A technology of radar and rainfall, which is applied in the field of data analysis related to precipitation intensity center of rainfall radar, to achieve the effect of eliminating moving direction or zero vector, improving forecast accuracy and improving continuity

Inactive Publication Date: 2017-06-20
NANJING AUTOMATION INST OF WATER CONSERVANCY & HYDROLOGY MINIST OF WATER RESOURCES
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Therefore, several current methods all have disadvantages

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  • Precipitation strong center tracking and prediction method of rainfall radar
  • Precipitation strong center tracking and prediction method of rainfall radar
  • Precipitation strong center tracking and prediction method of rainfall radar

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[0048] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0049] The radio frequency microwave emitted by the rainfall radar system reaches the antenna through the feeder part of the antenna feeder subsystem, and radiates directionally to the space. When the electromagnetic wave energy radiated by the antenna encounters precipitation targets such as clouds and rain, it will be scattered, and part of the backscattered radio frequency echo signal formed by the meteorological target is received by the antenna. The radio frequency echo signal received by the antenna is sent to the receiving subsystem through the feeder part, and after A / D conversion by the digital intermediate frequency converter, it becomes a digital interm...

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Abstract

The invention provides a precipitation strong center tracking and prediction method of a rainfall radar. The method includes the following steps that: tracking is performed, and a TREC vector field is obtained; smoothing processing is performed on a moving vector field; and the echo location and echo intensity of a precipitation strong center are predicted. According to the method of the invention, a TREC method is used to perform precipitation center tracking on an X-band intermediate-frequency coherent rainfall radar, and therefore, erroneous moving directions or zero vectors generated by the clutter of ground objects can be eliminated, the continuity of the TREC vector field can be improved; and additional processing is performed according to grids to which a plurality of data are shifted into, and grids to which no data are shifted to, and therefore, the accuracy of prediction is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of rainfall radar data processing, and in particular relates to a method for analyzing data related to precipitation intensity center of rainfall radar. Background technique [0002] The tracking and extrapolation of radar echoes is the key to automatic severe convective weather nowcasting. The precipitation intensity information of the new generation of Doppler weather radar has a high temporal and spatial resolution, and it is one of the important means for monitoring heavy rain and hail and nowcasting. [0003] We can use rainfall radar to monitor rainstorms in real time, analyze some important characteristics of rainstorms, and carry out early warning and nowcasting to reduce the occurrence of disasters. The previous monitoring methods include the centroid tracking method, which is to extrapolate and predict the centroid position of a certain echo at two consecutive moments after least square fitting. ...

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Application Information

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IPC IPC(8): G01S13/95
CPCG01S13/958Y02A90/10
Inventor 牛睿平邵军唐跃平陈伯云李辉张永兵李聂贵
Owner NANJING AUTOMATION INST OF WATER CONSERVANCY & HYDROLOGY MINIST OF WATER RESOURCES
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