ATMOSPHERIC TRANSMISSION IN THE 2.8-5.5-mu m REGION: DESCRIPTION OF THE FOURIER INTERFEROMETRIC TRANSMISSOMETER AND TYPICAL RESULT AT LOW TEMPERATURES

Authors
  1. Theriault, J-M.
  2. Roney, P.L.
  3. Reid, F.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A study of moderate resolution (1 cm1(-)) 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 (FIT) used for this study and a detailed analysis of the experimental protocol developed for that type of instrument are given. Results of the 2.8-5.5 mu m spectral window are compared to calculations using the LOWTRAN6 and FASCOD2 transmission codes. We examine the accuracy with which these codes predict transmittance in spectral domains (1800-2000 and 3200-3500 cm1(-)) strongly affected by water vapor concentration. Preliminary analysis, indicates that although LOWTRAN6 predicts well the summer transmittance (+30.3C) there are significant divergences for the winter case (-214C). The comparison of FASCOD2 with experimental results shows much closer agreement than LOWTRAN6 for both summer and winter cases.
Date of publication
15 Sep 1990
Number of Pages
14
Reprinted from
Applied Optics, vol 29, no 25, 1990, p 3654-3666
DSTKIM No
91-02821
CANDIS No
70016
Format(s):
Hardcopy;Originator's fiche received by DSIS

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