Air-induced collisional parameters in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg"><mml:msub><mml:mi>ν</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> band of methane

Air broadening and shift coefficients together with narrowing first order line mixing parameters were measured for 166 lines belonging to J″ manifolds of the P (J″=2−11), Q (J″=1−12) R (J″=0−11) branches ν3 band 12CH4 near 3.3 μm. These measurements carried out using a non-linear multispectrum least squares fitting technique. A hard collision Dicke narrowed shape model including Rosenkranz was applied. Five high resolution Fourier transform spectra recorded at room temperature, one low pressure pure methane four pressures up 904 hPa mixtures air. The are compared data available in literature.