Air broadened linewidths, intensities, and spectral line shapes for CO_2 at 43 μm in the region of the AMTS instrument

The absolute intensities and air-broadening coefficients, together with their temperature dependence have been determined for a series of very high-J R lines in the nu(3) band of CO(2) located in the spectral region of some Advanced Moisture and Temperature Sounder (AMTS) channels. These channels are located in the transmission microwindows limited by these lines. The temperature dependence of the absorption coefficient in these microwindows has been measured for N(2) and O(2) broadening. It has been clearly demonstrated that a correcting shape factor chi(sigma) independent of T cannot provide a good agreement between observed and calculated absorption in the range 193 K </= T </= 300 K for the spectral region of the AMTS channels.