Accession Number:

AD0702117

Title:

INVESTIGATION OF THE ABSORPTION OF INFRARED RADIATION BY ATMOSPHERIC GASES

Descriptive Note:

Semi-annual technical rept. 31 Jul 1969-31 Jan 1970

Corporate Author:

PHILCO-FORD CORP NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s):

Report Date:

1970-01-31

Pagination or Media Count:

30.0

Abstract:

The continuum absorption by H2O between 800 and 1250cm and by CO2 from 780 to 900cm has been measured. The continuum results from the extreme wings of very strong absorption lines centered outside the 800-1250cm interval. Experimental results are compared with calculated values based on various line shapes. The extreme wings of N2-broadened H2O lines produce less than 0.005 as much continuum absorption as self-broadened H2O lines at the same pressure. Self-broadened H2O lines absorb more than Lorentz-shaped lines, but the wings of self-broadened CO2 lines absorb only approximately 0.01 as much in the 780-900cm region as if they had the Lorentz shape. The shapes of the wings of the CO2 lines which produce the continuum between 780 and 900cm are similar to those near 2400cm for both self broadening and N2 broadening. Suggestions on methods for using the results for atmospheric transmission calculations are given.

Subject Categories:

  • Atmospheric Physics
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE