Measurement Of Atmospheric Emission Using A Balloon-Borne Cryogenic Fourier Spectrometer

H. Sakai; T. C. Li; J. Pritchard; F. J. Murcray; F. H. Murcray; J. Williams; G. Vanasse

doi:10.1117/12.932168

29 October 1981 Measurement Of Atmospheric Emission Using A Balloon-Borne Cryogenic Fourier Spectrometer

H. Sakai, T. C. Li, J. Pritchard, F. J. Murcray, F. H. Murcray, J. Williams, G. Vanasse

Proceedings Volume 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy; (1981) https://doi.org/10.1117/12.932168
Event: 1981 International Conference on Fourier Transform Infrared Spectroscopy, 1981, Columbia, United States

Abstract

In lower atmosphere, the tropopause and the stratosphere, the infrared emission radiance level directly relates to temperature and concentration of the molecules responsible for the emission. Our experiment was planned to obtain high precision data on altitude profiles of various atmospheric parameters (temperature, chemical composition, etc.) by measuring the infrared emission spectrum of the atmosphere from a balloon-borne platform. The emission measurement distinguished itself from the absorption measurement on the following aspects. A major distinction is derived from the fact that no definite source is required. The interferometer can point to any direction through the atmosphere, thereby not dictated by the diurnal change in the solar position. The atmospheric pollutant detection sensitivity can be made high in our experiment, because all lines are observed through a very long path in the atmosphere. Weak lines are observable in a well defined line structure, while strong lines show a saturation with respect to a corresponding black-body radiance. The diurnal variations, if they exist, are readily observable in the data.

Citation Download Citation

H. Sakai, T. C. Li, J. Pritchard, F. J. Murcray, F. H. Murcray, J. Williams, and G. Vanasse "Measurement Of Atmospheric Emission Using A Balloon-Borne Cryogenic Fourier Spectrometer", Proc. SPIE 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy, (29 October 1981); https://doi.org/10.1117/12.932168

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