Attenuation on an Earth-Space Path Measured in the Wavelength Range of 8 to 14 Micrometers

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Science  19 Jun 1970:
Vol. 168, Issue 3938, pp. 1456-1457
DOI: 10.1126/science.168.3938.1456


A telescope operating over the wavelength range of 8 to 14 micrometers has been added to the Crawford Hill sun tracker for the purpose of measuring attenuation in that atmospheric window. Over a 9-month period the attenuation (typically from clouds) exceeded 10, 20, and 30 decibels for 48, 43, and 34 percent of the time.