Abstract

Near infrared solar spectrum observations taken on October 15, 1954 with a double-pass Nacl prism spectrometer have been analyzed for transmission coefficients for the “selective” absorption factor and for the “continuum” factor. The analysis was carried out for 59 wavelength positions between 0.872 and 2.537 μ. The monochromatic data fit well the law °nT=c1(w)12 where w is the amount of water vapor in the optical path. The coefficient c1 is given as a continuous function of the wavelength. A coefficient of extinction for the “continuum” factor is also given.

© 1960 Optical Society of America

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