Accession Number : AD0467000

Title :   SPECTRAL TRANSMISSIVITY OF THE EARTH'S ATMOSPHERE IN THE 250 TO 500 WAVE NUMBER INTERVAL. PART III. A METHOD OF EXPERIMENTALLY DERIVING TRANSMISSIVITY,

Corporate Author : ARMY ELECTRONICS RESEARCH AND DEVELOPMENT ACTIVITY WHITE SANDS MISSILE RANGE NM

Personal Author(s) : Hall, James T. ; Querfeld, Charles W. ; Hoidale, Glenn B. ; Mireles, Ramon

Report Date : JUN 1965

Pagination or Media Count : 17

Abstract : Experimental observations of the transparency of the earth's atmosphere in the 20 to 40 micron region of the far infrared were carried out at 111 feet below sea level, 10,150 feet above sea level and 14,250 feet above sea level. The resultant solar spectra were compared to the theoretically computed spectra using the Lorentz line shape and the tabulated half-widths, line strengths and positions, with consideration given to the time-varying meteorological conditions that the radiation encountered in the slant path from the sun to the instrument. A method for determining transmissivity from the experimental data is derived. Sample comparisons of the experimentally determined transmissivity and the observed spectra are shown. (Author)

Descriptors :   (*ABSORPTION SPECTRA, INFRARED RADIATION), (*ATMOSPHERES, ABSORPTION SPECTRA), INFRARED SPECTRA, THEORY, SOLAR RADIATION, WATER VAPOR, CALIFORNIA, MIRRORS, SPECTRUM ANALYZERS, EQUATIONS, RELIABILITY.

Distribution Statement : APPROVED FOR PUBLIC RELEASE