Accession Number : AD0606112

Title :   ALTITUDE VARIATION OF RAYLEIGH, AEROSOL, AND OZONE ATTENUATING COMPONENTS IN THE ULTRAVIOLET REGION.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Elterman,L.

Report Date : MAY 1964

Pagination or Media Count : 1

Abstract : Atmospheric extinction in the ultraviolet is considered spectrally and with altitude as follows: (1) The Rayleigh scattering coefficients are determined by utilizing spectral scattering cross sections with molecular number densities from the U. S. Standard Atmosphere; (2) The aerosol attenuation coefficients are established from available transmission measurements in conjunction with a suitable aerosol density distribution. (3) The atmospheric ozone absorption coefficients result from Vigroux's coefficients applied to a generalized ozone distribution. The resulting coefficients and computed optical thickness values are placed in the format of a series of tabulations for wavelengths from 0.27 to 0.55 microns, with the parameters arrayed at kilometer intervals to an altitude of 50 kilometers. The tabulations presented permit various exploratory calculations including horizontal, vertical, and slant-path transmission from sea level and from space into the atmosphere; also, between any two desired altitudes within the occluding ozone region. (Author)

Descriptors :   (*ULTRAVIOLET RADIATION, ATTENUATION), (*ATMOSPHERES, ULTRAVIOLET RADIATION), AEROSOLS, OZONE, SCATTERING, LIGHT TRANSMISSION, ABSORPTION, OPTICAL PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE