Accession Number:

AD0423473

Title:

ON THE ROLE OF CLEAR SKY TURBIDITY IN ATMOSPHERIC INFRARED TRANSMISSION,

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CA

Personal Author(s):

Report Date:

1958-12-03

Pagination or Media Count:

36.0

Abstract:

A discussion is presented of the effect of natural haze aerosol particles on the transmission of infrared in the water vapo windows. The continuous absorption spectrum of liquid water is examined and it is shown that the absorption coefficient is unimportant as far as the scattering cross section of water droplets is concerned for infrared of wavelengths less than 2.5 microns. The extinction spectra, computed on the basis of water haze having a continuous drop size distribution, agree rather well with atmospheric measurements both in the horizontal and the vertical direction. The size distribution models are consistent with those which explain the atmospheric transmission and scattering of visible sunlight. It is recommended that the currently used standard atmospheres be modified to include a standard aerosol component with vertical stratification to represent this permanent feature of the real atmosphere. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE