Accession Number : AD0650812

Title :   ATTENUATION OF MILLIMETER WAVELENGTH RADIATION BY GASEOUS WATER,

Corporate Author : ATMOSPHERIC SCIENCES LAB WHITE SANDS MISSILE RANGE N MEX

Personal Author(s) : Hall,James T.

Report Date : JAN 1967

Pagination or Media Count : 45

Abstract : A theoretical computation for absorption by water vapor of radiation within the millimeter and submillimeter region of the electromagnetic spectrum permits the determination of attenuation coefficients for given water vapor densities, pressures and temperatures. The rigid asymmetrical top rotor approximation for all angular momentum quantum numbers J < or = 12 is used with the Zhevaklin-Naumov line shape and half-widths calculated by Anderson's theory. An equation is given for extrapolating attenuation coefficients to pressures and temperatures other than those for which calculations were performed. (Author)

Descriptors :   (*MILLIMETER WAVES, ATTENUATION), (*WATER VAPOR, ABSORPTION), ELECTROMAGNETISM, SUBMILLIMETER WAVES

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE