Accession Number : AD0695017

Title :   CEILING/VISIBILITY RECURRENCE AND DIURNAL VARIATION,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF SYSTEMS ENGINEERING OPERATIONS

Personal Author(s) : McAllister,Cyrus R.

Report Date : 11 JUL 1969

Pagination or Media Count : 30

Abstract : Estimators of conditional probabilities of recurrence of combined ceiling/visibility conditions associated with 8000 feet and 5 miles, respectively, are presented and tested against samples of data representative of semitropical climatological regimes. The estimators are shown to be reasonably efficient in the sense that about 95% of the achieved estimates fall within plus or minus 0.03 of observed values of the conditional probabilities. The results are contrasted with the higher degree of efficiency arising through application of similar methodology to cloud-cover amounts, where the comparable level was found to be 95% within plus or minus 0.02 for a large sample of northern hemispheric data. (Author)

Descriptors :   (*TROPICAL REGIONS, METEOROLOGY), (*METEOROLOGICAL PHENOMENA, DATA PROCESSING), (*VISIBILITY, PROBABILITY), (*CLOUD COVER, CEILING), VISIBILITY, DIURNAL VARIATIONS, SAMPLING, MATHEMATICAL PREDICTION, CLIMATE, ALTITUDE, LEAST SQUARES METHOD, STATISTICAL ANALYSIS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE