Transmission spectroscopy with the ACE-FTS infrared spectral atlas of Earth: A model validation and feasibility study

For an assessment of the detectability of molecular concentrations from transit spectra of Earth-like exoplanets, occultation spectra observed by the ACE-FTS instrument onboard the Canadian Earth observation satellite SciSat mission have been modeled with a line-by-line infrared radiative transfer code. For a quantitative estimate of visibility and detectability the maximum change of the residual spectrum, the relative change of the residual norm, the additional transit depth, and signal-to-noise ratios for a JWST setup are considered