Abstract
An infrared heterodyne radiometer has sufficient sensitivity for application to high resolution spectrometric studies of the sun and the absorption of sunlight in the atmosphere. In the 10-μm region, the resolution can typically range from less than 6.7 × 10−3 cm−1 to 6.7 × 10−2 cm−1. The minimum detectable signal can approach 10−24 W/Hz. The infrared heterodyne radiometer (IHR) can also be used for atmospheric propagation studies at the emission frequencies of the CO2 laser for the examination of the feasibility of space-to-ground laser communication links.
© 1972 Optical Society of America
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