Abstract
THERE has been considerable interest in applying infrared heterodyne techniques to astronomical problems1–3. We have used an infrared heterodyne spectrometer operating near 11 µm with a resolving power of 1.5 × 106 to obtain spectral line profiles of carbon dioxide absorption in the Martian atmosphere. The multichannel system determined shapes of three lines in the 10° 0–00° 1 vibration-rotation band of 13C16O2, and found equivalent widths about 50 MHz (0.0017 cm−1). A lower limit of 670 MHz (0.022 cm−1) on the equivalent width of the P(20) line of 12C16O2 was also obtained.
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PETERSON, D., JOHNSON, M. & BETZ, A. Infrared heterodyne spectroscopy of CO2 on Mars. Nature 250, 128–130 (1974). https://doi.org/10.1038/250128a0
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DOI: https://doi.org/10.1038/250128a0
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