Low RVR Features of Chengdu Shuangliu Airport and Its Relations with Meteorological Factors

Based on the hourly observational information from 2004 ~ 2015 at Chengdu Shuangliu airport, characteristics of low RVR (RVR<550 m) were analyzed statistically. The low RVR mainly appeared from November to next March and peaked in February, it occurred frequently during 05: 00 ~ 10: 00.When there appears low RVR, the ratio of remaining within the Type II operation mode is only 25. 9%, and the time to implement Type II operation is limited. The ratio of RVR which is lower than the minimum takeoff standard is 49. 8%. By making analysis of Monthly distribution characteristics of visibility, wind speed, temperature, relative humidity and sea level pressure when low RVR occurred, prediction basis was extracted, the forecast thought of low RVR was constructed.