Low-altitude wind shear identification method based on an automatic meteorological station

Abstract

The invention relates to a low-altitude wind shear identification method based on an automatic meteorological station. The method comprises the following steps: obtaining historical data of each windelement in a monitoring area; Performing quality control and time synchronization on the historical data to obtain a data list; Selecting effective data actually subjected to wind shear, and calculating a shear value of each wind factor; Scaling a standard value according to the distance between every two automatic meteorological stations, and comparing the standard values with a wind shear discrimination threshold to obtain a label of whether wind shear occurs or not; Taking each wind factor as an input, taking a label with wind shear as a result to form a data set, and using an SMOTE algorithm to balance the number of the two label types; A machine learning method is used for training, and an identification model is output; And reading the latest data of each automatic meteorological station, and inputting the latest data into the identification model to obtain an identification result. The method has the advantages of being high in recognition precision and good in local adaptability, the horizontal wind shear near the ground of the runway can be effectively recognized, and the guarantee efficiency of meteorological services is improved.

Description

technical field [0001] The invention relates to the field of automatic weather station data analysis, in particular to a low-altitude windshear identification method based on an automatic weather station. Background technique [0002] Wind shear is a common atmospheric phenomenon, which refers to the rapid change of wind direction (or) wind speed within a short distance at the same height or different heights. According to the change of wind direction, wind shear can be divided into horizontal shear of horizontal wind, vertical shear of horizontal wind and shear of vertical wind. Among them, the wind shear that occurs mainly during the take-off and landing phase of the aircraft below the flight altitude of 600 meters is called low-altitude wind shear. According to statistics from the World Meteorological Organization and the International Civil Aviation Organization, low-altitude wind shear is the weather phenomenon that poses the greatest threat to flight safety during tak...

AI Technical Summary

Problems solved by technology

Among them, the more mature and effective system is the LLWAS system in the United States, but it has high requirements for the deployment quantity and location of ground wind measurement equipment, and it is not targeted enough for local terrain, climate characteristics, and equipment characteristics

At present, many small and medium-sized airports are not equipped with ground wind measuring equipment in the quantity and installation location required by the LLWAS system, and the local adaptability of the wind shear algorithm of the LLWAS system has not been verified and reliable, and the actual operation mainly depends on the judgment of the forecaster , there is still room for improvement in accuracy and coverage

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