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A method for remotely measuring ambient pressure and temperature at altitudes on the order of 40 km is presented. The technique is that of backscattered fluorescence from the OH radical measured from a balloon platform. Pressure is deduced from the ratio of (1, 1) fluorescence to (0, 0) fluorescence, while the temperature measurement is based on rotational level population changes with changes in temperature.
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McGee et al. (1979) studied this question.
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