Abstract
THERE are important advantages in using submillimetre waves and, by implication in this context, the pure rotation band, for determining the distribution of water vapour with height in the atmosphere. First, single rotation lines in this region can be readily resolved by Fourier spectroscopy, using interferometers. The calibration for intensity of single lines is easily made and a range of lines with different absorption strengths can then be chosen to match the requirements of the inversion procedure used to construct the model radiating atmosphere1. Second, the use of long wavelengths makes it possible to dispense with hot radiation sources and use, for example, the radiation exchange between a room temperature detector and cold sky2.
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References
Kuhn, P. M., Lojko, M. S., and Petersen, E. W., Nature, 223, 462 (1969).
Gebbie, H. A., Burroughs, W. J., Harris, J. E., and Cameron, R. M., Astrophys. J., 154, 405 (1968).
Eddy, J. A., and MacQueen, R. M., J. Geophys. Res., 74, 3322 (1969).
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GEBBIE, H., KUHN, P. & BOHLANDER, R. Scattering by High Cirrus: its Effect on Submillimetre Wave Determinations of Atmospheric Water Vapour. Nature 226, 71–72 (1970). https://doi.org/10.1038/226071a0
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DOI: https://doi.org/10.1038/226071a0
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