Accession Number : ADA130946

Title :   A New Characterization of Supercooled Clouds below 10,000 Feet AGL (Above Ground Level).

Descriptive Note : Final rept.,

Corporate Author : FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ

Personal Author(s) : Masters,Charles O

PDF Url : ADA130946

Report Date : Jun 1983

Pagination or Media Count : 50

Abstract : Icing envelopes which effectively characterize supercooled clouds from ground level to 10,000 feet above ground level over the conterminous United States have been generated from a new data base of aerial observations. This data base, recently established via an Interagency Agreement between the FAA and the Naval Research Laboratory is the largest, most significant compilation of low-altitude supercooled characteristics currently in existence. It is intended that this new characterization serve as a basis for the establishment of design criteria and regulations that pertain to ice protection systems and equipments for low performance aircraft which typically operate below 10,000 feet. This new characterization groups the supercooled cloud properties for all cloud types observed into three temperature ranges and presents their associated values of liquid water content (LWC), range of median volume droplet diameters (MVD), and icing event duration. Details of the analysis process are discussed which use a least squares logarithmic regression estimation technique to predict the extreme values of supercooled cloud properties. (Author)

Descriptors :   *Clouds, Low altitude, Supercooling, Water, Drops, Diameters, Atmospheric temperature, Ice formation, Statistical analysis, Graphs, Computer programs

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE