Accession Number : ADA140502

Title :   Determination of Stratospheric Wind Profiles by Digital Analysis.

Descriptive Note : Final rept. 14 Aug 81-13 Aug 83,

Corporate Author : PHOTOMETRICS INC WOBURN MA

Personal Author(s) : Trowbridge,C A

PDF Url : ADA140502

Report Date : 04 Jan 1984

Pagination or Media Count : 45

Abstract : A program to measure altitude profiles of the horizontal wind velocity in the stratosphere using smoke trail tracers is described. The system for accessing and digitizing photographs of the sunlight scattering trails was updated with new hardware and software. Film plane coordinates of trail center lines were identified by computer programs, and vector triangulation was applied to determine three-dimensional coordinates of the trail. Highly accurate camera orientations were obtained for input to the triangulation procedure by digitizing images of known stars. Time sequences of positions of points on the trail centerline were then processed to determine the horizontal wind field and its vertical shears.

Descriptors :   *WIND, *IMAGE PROCESSING, STRATOSPHERE, SMOKE, PHOTOGRAPHIC IMAGES, DIGITAL RECORDING SYSTEMS, TRIANGULATION

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE