Accession Number : AD0430526

Title :   PROBLEMS AND METHODS OF THE ABSOLUTE PHOTOMETRY OF NOCTILUCENT CLOUDS.

Corporate Author : LIBRARY OF CONGRESS WASHINGTON DC AEROSPACE TECHNOLOGY DIV

Report Date : 28 JAN 1964

Pagination or Media Count : 28

Abstract : The object of investigating noctilucent clouds by photometric methods is to obtain optical characteristics of the cloud-forming aerosol which will permit the formulation of conclusions concerning the chemical composition and physical state of the dispersed particles. Among these characteristics are: (1) the scattering indicatrix, which expresses the directional distribution of the scattered light; (2) variation of the scattering coefficient with wavelength; (3) variation of extinction along the spectrum; (4) polarization of the scattered light; and (5) the character of such luminescence as may exist in the medium. (Author)

Descriptors :   (*CLOUDS, PHOTOGRAPHIC ANALYSIS), PHOTOMETERS, AEROSOLS, SCATTERING, SPECTRUM ANALYZERS, POLARIZATION, LUMINESCENCE, OPTICAL PROPERTIES, BRIGHTNESS, CAMERAS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE