Vol. 7, issue 10, article # 3

Belan B. D., Zadde G. O., Kuskov A. I. Long-period variations of the spectral transmittance of the atmosphere. // Atmospheric and oceanic optics. 1994. V. 7. No. 10. P. 721-724.    PDF
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Abstract:

Methods of selecting the long-period components from the series of monthly average values of the atmospheric spectral transmittance are discussed in the paper. The polynomials of first and second degree are shown to be the best approximations of the trend.