Accession Number : AD0674891

Title :   METEOROLOGICAL CONDITIONS OF AIRCRAFT LANDING (METEOROLOGICHESKIE USLOVIYA POSADKI SAMOLETOV),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Sachkov,N. K.

Report Date : 15 DEC 1967

Pagination or Media Count : 30

Abstract : A procedure is given for determining the occurrence of minimum visibility and ceiling. The procedure is based on the relationship between the minimum height of the cloud bottoms and the landing (inclined) visibility. The 'bad weather' was analyzed in several regions: the visibility of less than 2000 m and/or a ceiling of less than 200 m. The reproducibility of 'bad weather' follows a definite path with the maximum occurring in the cold time of the year. The number of bad weather hours decreases from west to east. An attempt was made to relate the occurrence of bad weather to some synoptic-aerological factors such as fronts, anti-cyclones and sporadic winds. The proposed method of a climate approach to the occurrence of combined visibility and cloud height furnishes an average as well as the extreme number of hours of minimum weather at the given station. In turn, such data permit calculation of the probable working time of the airport per month, season, or year. The number of stand-by airports needed for the times of bad weather can also be determined. (Author)

Descriptors :   (*WEATHER, *AIRCRAFT LANDINGS), CEILING, VISIBILITY, ALL WEATHER AVIATION, CLIMATE, TABLES(DATA), USSR

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE