A discussion on infared astronomy - Interferometric spectra of the Earth’s airglow (1.2 to 1.6 μm)

Abstract
The principal emission in the Earth ’s airglow at wavelengths between 1 and 2 μm is the Av = 2 sequence of the hydroxyl vibration-rotation bands (Gush & Vallance Jones 1955; Shemansky & Vallance Jones 1961). The hydroxyl emission, whose bands extend from the visible region to 4μm, is present in both the day and night airglow and is probably produced by the chemiluminescent reaction between atomic hydrogen and ozone (Wallace 1962) H + 0 3 - > O H (»' < 9) + 0 2. T he application of the multiplex Fourier spectroscopy to the study of this region of the pectrum (Connes & Gush 1960; Gush & Buijs 1964) has increased the resolving pow er attainable by nearly an order of magnitude, making possible the resolution of the rotational structure of the bands and allowing m ore precise determination of the rotational temperature. During the day, the brightness of the hydroxyl bands is exceeded by th at of the infrared atmospheric system of oxygen whose most intense bands are the 0-0 at 1-27 and the 0-1 at 1-58 um .G round-level observations of this system have been limited to the 0-1 band since the 0-0 band is strongly absorbed by the oxygen of the lower atmosphere (Vallance Jones & Harrison 1958).

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