13 October 1995 Emission and absorption of impurity gases in the lower atmosphere
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Abstract
Calculations have been made of molecular absorption coefficients and spectral contrasts of radio brightness temperatures in millimeter waveband caused by atmospheric impurity gases. We have defined optimal frequencies and angles of impurity gas remote sensing when the contrasts of radio brightness temperatures for impurity and pure atmosphere become measurable and take maximum values. The main attention has been paid to the radiometric monitoring of sulfur dioxide and ozone. We have studied the possibilities of the radio emission reception in wide resonant bands of impurity gases. In some parts of the millimeter band there exists a strong nonlinear dependence of the atmosphere radio emission on frequency. Because of this, even in the case of a pure atmosphere there is at any time a difference signal between channels positioned at the center and wings of the spectral line. Some methods and algorithms of their account have been proposed. A description is given of the spectral radiometer designed for the frequency band of sulfur dioxide 131 GHz with a sensitivity of 0.1 K. Preliminary results are presented of the atmosphere radio emission investigation in the frequency band of sulfur dioxide 131 GHz near industrial objects.
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Nadezhda Nikolaevna Markina, Nadezhda Nikolaevna Markina, Albert P. Naumov, Albert P. Naumov, Arkadij V. Troitskij, Arkadij V. Troitskij, } "Emission and absorption of impurity gases in the lower atmosphere", Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); doi: 10.1117/12.224255; https://doi.org/10.1117/12.224255
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