Example of CIRS limb spectra acquired at 1°N in July 2016 (left panel, black line) and 81°S in January 2016 (right panel, black line) at three different tangent heights. They are compared with the best fit spectra (in red). These spectra can be compared with those of Fig. 1 of Mathé et al. (2020, their Figs. 1 and2) acquired at similar location, altitude, and date at higher spectral resolution. The band centered at 630 cm⁻¹ includes C₄H₂ and CH₃C₂H emission; the band centered at 673 cm⁻¹ includes HC₃N, CO₂, and C₆H₆. HCN, C₂H₂, and C₃H₈ emission bands are centered respectively at 713, 730, and 748 cm⁻¹. C₂H₆, C₂H₄, and CH₄ bands are centered at 815, 950, and 1300 cm⁻¹, respectively. An overlap between FP3 and FP4 spectra occurs in the 1000–1050 cm⁻¹ spectral range.