Disk-integrated spectrum of Venus between 1344.95 and 1345.30 cm⁻¹ recorded by TEXES on September 27, 2021 (black points). A weak telluric absorption appears between the two SO₂ multiplets. Models: SO₂ = 100 ppbv (green), 150 ppbv (red), and 200 ppbv (blue). We infer from these fits a SO₂ vmr of 125 ± 25 ppbv. The SO₂ vmr inferred from the line depth ratio (see text) is 135 ± 14 ppbv.