Accession Number : AD0745951

Title :   Absorption of the 4- to 6-mm Wavelength Band in the Atmosphere.

Descriptive Note : Rept. for Jul 69-Jun 71,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Reber,Earl E.

Report Date : 15 MAR 1972

Pagination or Media Count : 48

Abstract : The analysis of an extensive series of zenith attenuation measurements of the atmosphere on both sides of the oxygen absorption spectrum (48 to 72 GHz) elucidates the absorption characteristics of the 4- to 6-mm wavelength band. With the sun as a source, zenith attenuation measurements were made and used as a function of the precipitable water content of the atmosphere to determine the zenith attenuation coefficients of precipitable water. From these coefficients and measurements of the total precipitable water in the atmosphere, the oxygen components of the zenith attenuation were determined. The zenith oxygen attenuations as a function of frequency and altitude are used to compare the theories for collision-broadened spectral lines and to develop a new expression for pressure-broadened spectral lines. (Author)

Descriptors :   (*ATMOSPHERES, MILLIMETER WAVES), (*OXYGEN, MICROWAVE SPECTROSCOPY), ABSORPTION SPECTRA, ATTENUATION, ATMOSPHERE MODELS, WATER VAPOR

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE