一次人工水平能见度数据的异常值分析

Analysis of Outliers in an Artificial Horizontal Visibility Data Service

利用数据流逆推的方式,从最终服务数据、入库、解码、快速质控、原始报文等各环节,对镇安国家级自动气象站2016年9月8日02时的人工观测水平能见度要素突变为0的现象进行分析,并对多个国家站的同类现象进行汇总对比。结果表明:人工水平能见度的观测值确实存在为0的现象,这与数据采集及观测规范设定相关,会对后续的解码入库及数据服务环节造成影响。

This paper is based on the method of data flow reverse,from every data link including the final service data value,storage,decoding,fast quality control,original data file etc.the phenomenon about abrupt change value of artificial horizontal visibility elements to zero in Zhen’an national automatic observation station in September 8,2016 UTC 02 was analyzed At the same time,it made a summary and comparison of similar phenomena in other national automatic observation stations.The result indicated that a phenomena about observed zero value of artificial horizontal visibility certainly existed,which is related to the data acquisition anomaly and the setting of the observation standard,and would have an impact on the subsequent link such as data decoding and data service.