Abstract

In the 4.2-μ to 5-μ region of the spectrum, the absorption in the earth’s atmosphere is primarily due to the 4.3-μ bands of CO2, the 4.6-μ bands of N2O, and the 4.7-μ bands of CO. These minor constituents appear to be uniformly distributed in the atmosphere. As a result, the absorption in a small frequency interval can be written as a function of atmospheric pressure and temperature. The spectral absorption is calculated for homogeneous absorber path lengths representative of various heights in the telluric atmosphere. Application of the Curtis–Godson approximation allows the calculations to be extended to real, nonhomogeneous atmospheric paths. The spectral energy distribution of the radiation passing through various isobaric levels of the earth’s atmosphere is presented for several model atmospheres. The quasi-statistical band model is used to compute the spectral absorption in the region 2000 cm−1 to 2400 cm−1 at intervals of 5 cm−1. A normal abundance of isotopic molecules is assumed and a total of ninety-nine vibrational transitions are considered. Spectral absorption computed for the individual molecules is shown to be in good agreement with laboratory data.

© 1965 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Spectral Absorption of the 4.6-μ, Bands of N2O

L. D. Gray
Appl. Opt. 4(11) 1494-1499 (1965)

Atmospheric Transmission Measurements in the 4.3-μ CO2 Band at 5200-m Altitude

P. J. Berry, C. B. Farmer, and D. B. Lloyd
Appl. Opt. 4(9) 1045-1050 (1965)

Atmospheric Transmission in the CO2 Bands Between 12 μ and 18 μ

S. Roland Drayson
Appl. Opt. 5(3) 385-391 (1966)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (20)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription