Abstract
The paper considers the artificial corrections of measured gas pressures and wavenumber scale shifts for multispectrum fit by the example of R(22) carbon dioxide self-broadened line of 30013←00001 vibrational band. For this purpose the two quadratic and hypergeometric speed-dependent Voigt line profile models including line mixing within the (Rosenkranz) first-order approximation for line-coupling effects with linear dependences of corresponding model parameters on pressure were applied. The intercomparison of the retrieved results only for pressure corrections, only for wavenumber scale shifts, for both together, and for no correction case demonstrates considerable disagreement between them. The most significant differences in parameters, retrieved in such a way, belong to the first-order line-mixing coefficients and are caused mostly by the shift scattering of wavenumber scale at different pressures.
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