Automatic meteorological station data quality control method based on empirical mode decomposition
An empirical mode decomposition, automatic weather station technology, applied in the direction of instruments, etc., can solve the problems of inability to eliminate random noise, system noise, micro-meteorological noise and coarse noise, and achieve the effect of improving reliability.
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[0033] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0034] Be the flow process of the method of the present invention, as figure 1 As shown, the single-station data is collected, and after the basic quality control of the collected data, the EEMD (empirical mode) decomposition is performed to obtain the eigenmode components and trend items, and the eigenmode components and trend items are further weighted , to obtain the weighted eigenmode component and the weighted trend item, and finally perform data reconstruction on the weighted eigenmode component and the weighted trend item to obtain the denoised data, and the denoising process is completed.
[0035] The following will be numbered as 58238 stations in Nanjing in January, 2007, and the temperature data observed once every 10 minutes is carried out embodiment analysis, further illustrate the present invention:
[0036] 1. Collect temperature observation data x...
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