Calculation of CO2-shift Coefficients of SO2 Lines: ν1 + ν3 Band

Parameters of the SO2–CO2 line profile are important to study the carbon dioxide atmospheres of terrestrial planets (Venus and Mars) and exoplanets. The carbon-dioxide shift coefficients of sulfur dioxide lines in ν1 + ν3 band are calculated at room temperature; the rotational quantum numbers J varies from 0 to 100 and Ka varies from 0 to 20. Calculations were made using a semi-empirical method, which includes a correction factor with adjustable parameters depending on the rotational quantum numbers. The calculated shift coefficients are in good agreement with few published data.