Knowledge Bank

High-resolution spectra of the $\nu 4$ fundamental band of $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$CH$4$ broadened by N$2$ at temperatures relevant to the atmosphere of Titan were recorded using temperature-controlled absorption cells nderline{\textbf{262}} (2010) 122-134.} installed in the sample compartment of a Bruker IFS-125HR Fourier Transform spectrometer (FTS) at the Jet Propulsion Laboratory (JPL). Analysis of these spectra using multispectrum fitting nderline{\textbf{53}} (1995) 705-721.} has determined half widths, pressure-induced shifts, line mixing parameters and their temperature dependences for transitions belonging to a number of P- and R-branch J-manifolds. The analysis examined in detail the temperature-dependence of N$2$-broadened half width and pressure-induced shift coefficients over the entire temperature range from 80 K to 296 K. The results are compared with other published measurements of N$2$- and air-broadened methane parameters.