An urban rainfall retrieval algorithm based on microwave attenuation feature response fingerprint identification

A characteristic response, microwave attenuation technology, applied in character and pattern recognition, pattern recognition in signals, calculation, etc., can solve the problem that affects the microwave signal's ability to capture rainfall, the deviation between the estimated rainfall and the actual rainfall value is large, and the error is impossible. Completely eliminate and other problems to achieve the effect of adapting to high-resolution rainfall observations and improving accuracy and stability

Active Publication Date: 2019-01-22
HOHAI UNIV
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Problems solved by technology

[0005] However, the environment in urban areas is complex, and different types of noise and clutter greatly affect the ability of microwave signals to capture rainfall. Therefore, how to quickly identify and extract the characteristic response of microwave decay to sensitive atmospheric variables such as water vapor content and atmospheric visibility , and then removing the influence of environmental noise and clutter is one of the key issues that must be considered in the application of this technology to the construction of urban high-resolution real-time rainfall data, and it is also the main shortcoming of the current research
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  • An urban rainfall retrieval algorithm based on microwave attenuation feature response fingerprint identification
  • An urban rainfall retrieval algorithm based on microwave attenuation feature response fingerprint identification

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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and essence of the present invention, the modifications and substitutions made to the methods, steps or conditions of the present invention all belong to the scope of the present invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0036] The present invention proposes an urban rainfall inversion algorithm based on microwave attenuation characteristic response fingerprint recognition, such as figure 1 shown.

[0037] Preliminarily process the signal strength data R(t) collected by the microwave network, interpolate data loss at individual time points caused by signal collisions and other reasons, and elimin...

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Abstract

The invention discloses an urban rainfall inversion algorithm based on microwave attenuation characteristic response fingerprint identification, includes the acquisition and preliminary processing ofmicrowave signals, the separation and classification of clutter signals, the establishment of clutter characteristic response fingerprint database, the identification and removal of clutter, rainfallinversion, scale matching of multi-source rainfall data, the optimization of model parameters and the real-time correction of inversion results. The invention can quickly judge and remove the influence of different types of clutter in the microwave attenuation signal under the urban environment, and provides urban multi-resolution rainfall big data with a spatial resolution of 100 meters-200 meters and a time resolution of 5 minutes-10 minutes.

Description

technical field [0001] The invention relates to the technical field of meteorological factor monitoring, in particular to an urban rainfall inversion algorithm based on microwave attenuation characteristic response fingerprint recognition. Background technique [0002] Real-time and high-precision rainfall monitoring data is the premise of realizing flood and drought disaster prevention, water resources development and utilization, and comprehensive management. At present, the more common real-time rainfall data monitoring methods mainly include rainfall stations and radar. Difficult to maintain, low station network density, poor data reliability and other outstanding problems, compared with the demand for fine urban management, there is a big gap; radar observation is also an important monitoring method, which can provide a maximum time resolution of 5 minutes, spatial resolution The rainfall distribution is 100m×100m, but the radar has defects such as being easily affecte...

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Application Information

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IPC IPC(8): G06F17/16G06K9/00
CPCG06F17/16G06F2218/02G06F2218/08G06F2218/12
Inventor 杨涛郑鑫秦友伟师鹏飞
Owner HOHAI UNIV
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