Accession Number : ADA112264

Title :   Continuum Absorption by H2O.

Descriptive Note : Final rept. Jan 79-Nov 81,

Corporate Author : FORD AEROSPACE AND COMMUNICATIONS CORP NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s) : Burch,Darrell E

PDF Url : ADA112264

Report Date : Mar 1982

Pagination or Media Count : 48

Abstract : Data on the H2O continuum absorption obtained by many different workers from laboratory samples and atmospheric paths are compared in the various windows in the infrared, millimeter-wave and microwave regions. Values of the continuum absorption coefficients calculated on the basis of simple, widely used line shapes may differ greatly from observed values in the windows between strong absorption lines. The temperature dependence of this absorption is also not predictable from present day understanding of line shapes or of dimers, which are thought by many to contribute. The shapes of self-broadened H2O lines are quite different from those of N2-broadened lines, and the difference increases with increasing distance from the centers of the lines. Several characteristics of the continuum absorption are common throughout the windows from the infrared to the microwave region. (Author)

Descriptors :   *INFRARED SPECTROSCOPY, *ABSORPTION SPECTRA, *LINE SPECTRA, *WATER, *LABORATORY TESTS, ATMOSPHERES, PATHS, SAMPLING, ABSORPTION COEFFICIENTS, MICROWAVES, FREQUENCY, DATA TRANSMISSION SYSTEMS, SHAPE

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE