Abstract

Errors can occur in laboratory measurements when the response of a bandpass-filtered radiometer extends into an atmospheric absorption region. Atmospheric models, such as modtran3, can be valuable tools that permit the optical measurements in these regions to be accurately analyzed, provided the models themselves are accurate. Comparisons of modtran3-predicted and laboratory-measured atmospheric transmittance have been made to help establish the validity of modtran3 for use in modeling short-path-length (a few meters or less), low-resolution optical effects over a wavelength range of 700–5700 nm. Comparisons include percentage differences, range of differences, and band-averaged differences. Good agreement is shown for all absorption bands except for the CO2 band near 4300 nm. In general, the band-average differences are less than ∼0.75% for all water bands. For the CO2 band the modtran3 default CO2 level is found to be inappropriate, and 610 parts per million in volume is found to give much better agreement with measurement.

© 1998 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Validation of fascod3 and modtran3: comparison of model calculations with ground-based and airborne interferometer observations under clear-sky conditions

Jinxue Wang, Gail P. Anderson, Henry E. Revercomb, and Robert O. Knuteson
Appl. Opt. 35(30) 6028-6040 (1996)

Direct solar spectral irradiance and transmittance measurements from 350 to 2500 nm

Bruce C. Kindel, Zheng Qu, and Alexander F. H. Goetz
Appl. Opt. 40(21) 3483-3494 (2001)

Measured and predicted atmospheric transmission in the 4.0–5.3-μm region, and the contribution of continuum absorption by CO2 and N2

L. S. Bernstein, D. C. Robertson, J. A. Conant, and B. P. Sandford
Appl. Opt. 18(14) 2454-2461 (1979)

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 (10)

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 (2)

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

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