Spectroscopic Parameter Requirements for Remote Sensing of Terrestrial Planets

2018-05-28T23:33:42Z (GMT) by Smith, Mary Ann H.
Planetary scientists seek to determine the compositions, dynamics, energetics, and chemical behaviors of planetary atmospheres through measurements of atmospheric absorption or emission in a number of wavelength regions. Laboratory studies of molecular spectra are often required to properly interpret telescope and spacecraft observations, particularly for atmospheres of planets such as Mars and Venus that have compositions and temperature and pressure regimes quite di’erent from those in the Earth's atmosphere. While many of the necessary spectroscopic parameters are already available in databases such as HITRAN, updates are needed to meet the changing requirements of terrestrial planetary remote sensing missions. Key issues include (1) expanding line lists to cover near-infrared transitions, (2) adding parameters for isotopologues, (3) lower intensity cuto’s to allow more weak transitions to be listed, and (4) adding parameters for broadening and shifts by gases other than air. Specific requirements, discussed in the recent Chapman Conference on Exploring Venus as a Terrestrial Planet and at the NASA Astrobiology Science Conference, will be reviewed

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