Accession Number : AD0688916

Title :   AN ESTIMATE OF POSITIONAL, ANGULAR, AND VELOCITY UNCERTAINTIES AS DETERMINED FROM TRIPLE THEODOLITE WIND SOUNDINGS.

Descriptive Note : Final rept. 15 Feb 68-15 Mar 69,

Corporate Author : ATLANTIC RESEARCH CORP COSTA MESA CALIF MISSILE SYSTEMS DIV

Personal Author(s) : Ammons,Robert L.

Report Date : 15 MAR 1969

Pagination or Media Count : 143

Abstract : The data from 6,358 triple theodolite measurements of pilot balloon position have been reduced, and an estimate of the positional and angular uncertainties determined. The technique employed consists of a least-squares positional solution of the balloon position, which is shown to result in a different balloon position (and angular variance) than a least-squares-angular solution. The relative merits of the two solutions are discussed, as are advanced techniques of estimating balloon velocity. The balloon positional uncertainties and theodolite angular uncertainties (defined by the least-squares positional solution) are shown to have other than a Gaussian distribution, and their dependence upon balloon altitude and velocity is discussed. (Author)

Descriptors :   (*SOUNDING ROCKETS, IMPACT PREDICTION), (*ATMOSPHERIC SOUNDING, WIND), THEODOLITES, BALLOONS, HIGH ALTITUDE, WEATHER FORECASTING, SCATTERING, VELOCITY, MATHEMATICAL MODELS, ERRORS, STATISTICAL FUNCTIONS, DATA PROCESSING, TABLES(DATA)

Subject Categories : Atmospheric Physics
      Rockets

Distribution Statement : APPROVED FOR PUBLIC RELEASE