Accession Number : ADA113107

Title :   Estimating the Tops, Bases, and Amount of Cloudiness from in situ Sampling.

Descriptive Note : Final rept. 1 Nov 80-17 Nov 81,

Corporate Author : SYSTEMS AND APPLIED SCIENCES CORP RIVERDALE MD

Personal Author(s) : Touart,C N ; Shapiro,Ralph ; Mansfield,Peter J ; Schechter,Randy

PDF Url : ADA113107

Report Date : 17 Nov 1981

Pagination or Media Count : 75

Abstract : How accurately can the bases, tops, and amounts of the cloud layers over a tactical target area be determined from measurements made with an airborne sensor capable only of detecting cloud presence in situ? Various sampling patterns are evaluated in terms of accuracy of cloud inferrence as well as cost in fuel and time. Surprisingly, it is found that the best strategy is to sample the volume in alternate ascents and descents in tight spirals, thereby producing a regular pattern of widely separated point measurements in each horizontal plane over the target area. The inherent redundancy of closely spaced samples of cloudiness results in a wastage of fuel in horizontal flight that more than compensates for the higher rate of fuel consumed in multiple ascents. (Author)

Descriptors :   *CLOUDS, *SAMPLING, CLOUD COVER, BATTLEFIELDS, REMOTELY PILOTED VEHICLES, DETECTORS, FLIGHT PATHS, PATTERNS, OPERATIONAL EFFECTIVENESS, STATISTICAL ANALYSIS, MATHEMATICAL MODELS, AUTOCORRELATION

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE