云和站能见度自动观测系统与人工观测的对比分析

Compare and Analysis of Visibility between Automatic Observation Instrument and Artificial Observation at Yunhe Observed Station

将能见度仪自动观测的能见度与人工观测的能见度记录进行对比,分析2种观测数据的差异。通过相关系数、对比差值等统计数据分析,结果表明,自动观测数据的离散度、精确度和精密度在低能见度时最高,然后随着能见度的增大而降低。vis<1.0 km时,人工观测与能见度仪测得的能见度值之间的一致性很好,对比差值很小,是所有能见范围内差值最小的一组,相关性好,是所有能见范围内相关性最好的一组;1.0 km≤vis<10.0 km时,相关性、对比差值、一致性(总体上看)都较vis<1.0 km时表现差;vis≥10.0 km时,相关性、对比差值、一致性(总体上看)都是所有能见范围内最小的一组。低能见度时,自动观测效果较好,对人工观测有很好的代替作用,而随着能见度的逐渐升高,两者之间的差距不断加大,能见度仪的可替代性逐渐降低,但是仍有一定的可取性。

The visibility of automatic observation and the visibility of artificial observation were contrasted, differences of the two observational data were analyzed, through analyzing correlation coefficient, contrast difference and other statistical date analysis. The result showed that the discrete degree ,accuracy and precision of automatic observation data in low visibility were the highest ,and it reduced with the increase of visibility. When visibility〈1.0 kin,the visibility of artificial observation and automatic observation were consistent well,contrast difference is the smallest and the correlation is the best in all of the visibility distance. When 1.0 km ≤ visibility〈 10.0 kin, the correlation, contrast difference and consistency （on the whole）were worse than when visibility〈 1.0 kin.when visibility ≥ 10.0 kin, the correlation, contrast difference and consistency （on the whole ）were the worst of all. Automatic observation has better result at low visibility,can almost replace artificial observation,but along with the gradually increasing of visibillty,the gap hetween them increasing,the substitutability of automatic observation gradually decrease, hut it is still advisable.