Atmospheric transmission in the 2.8-5.5-micron region - Description of the Fourier interferometric transmissometer and typical result at low temperatures

Details Atmospheric transmission in the 2.8-5.5-micron region - Description of the Fourier interferometric transmissometer and typical result at low temperatures Atmospheric transmission in the 2.8-5.5-micron region - Description of the Fourier interferometric transmissometer and typical result at low temperatures

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apopt..29.3654t&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 29, Sept. 1, 1990, p. 3654-3666.

Physics

Optics

8

Atmospheric Optics, Fourier Transformation, Infrared Absorption, Interferometry, Transmissometers, Atmospheric Models, Atmospheric Moisture, Atmospheric Temperature, Low Temperature, Remote Sensing

Scientific paper

A study of moderate resolution (1/cm) atmospheric transmission measurements made over a 5.7-km path and under a wide range of temperatures and humidities is presented. A description of the Fourier interferometric transmissometer used for this study and a detailed analysis of the experimental protocol developed for that type of instrument are given. Results for the 2.8-5.5 micron spectral window are compared to calculations using the LOWTRAN6 and FASCOD2 transmission codes. The accuracy with which these codes predict transmittance in spectral domains (1800-2000 and 3200-3500/cm) strongly affected by water vapor concentration is examined. Preliminary analysis, indicates that although LOWTRAN6 predicts well the summer transmittance (+30.3 C) there are significant divergences for the winter case (-21.4 C). The comparison of FASCOD2 with experimental results shows much closer agreement than LOWTRAN6 for both summer and winter cases.

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