Abstract
A grating spectrometer with a Ge Cu detector was flown on three balloon flights. Spectra in the 4–14.3-μ region were obtained at various altitudes from the ground through 30 km with a resolution considerably better than that achieved in previous flights. Some of the spectra were obtained over long paths at float altitude, during the sunset. Data from these flights are presented with a discussion of the significant features of the observed absorptions. Special emphasis is put on the new features observed during the sunset.
© 1969 Optical Society of America
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