Accession Number : AD0680771

Title :   OXYGEN ABSORPTION IN THE EARTH'S ATMOSPHERE.

Descriptive Note : Rept. for May 65-Mar 68,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Reber,Earl E. ; Mitchell,Richard L. ; Carter,Clarence J.

Report Date : NOV 1968

Pagination or Media Count : 102

Abstract : An extensive measurement program designed to measure the attenuation of electromagnetic energy in the oxygen absorption spectrum (at 5-mm wavelength) by the atmosphere is described. Measurements were made utilizing the sun as a source at six discrete altitudes ranging from sea level to 13.7 km and over a frequency range of 53.4 to 56.4 GHz. The more than 1500 independent attenuation measurements were used to calculate new values for the Van Vleck line-broadening coefficients. Zenith attenuations were computed utilizing these new coefficients over the frequency range 48 to 72 GHz and for several altitudes from 0 to 25 km. In addition, both horizontal attenuation rates and tangential attenuations through the atmosphere have been computed for several altitudes. (Author)

Descriptors :   (*OXYGEN, *ABSORPTION SPECTRA), (*MILLIMETER WAVES, ATTENUATION), SOLAR RADIATION, ATTENUATION, ALTITUDE, FREQUENCY, TEST METHODS, UPPER ATMOSPHERE, RESONANCE ABSORPTION, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, TABLES(DATA)

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE