Top panel: transmission spectra generated using PICASO (N. E. Batalha et al. 2019) for atmospheres dominated by N₂, H₂, He with 1% CO₂ levels and condensable H₂O. The planetary and stellar properties are those of exoplanet LHS 1140 b as described by C. Cadieux et al. (2024) and C. Cherubim et al. (2025). Bottom panel: simulated JWST data using PandExo (N. E. Batalha et al. 2017) for the same atmospheres. The points represent the simulated data points with the corresponding error bars. The thicker lines represent the reconstructed transmission spectra based on the simulated data in each case. The instrument chosen for this simulation was NIRSpec PRISM. Observational data of LHS 1140 b reported by M. Damiano et al. (2024) are shown in green.