The CHD Absorption Spectrum Near 1.58 μm: Extended Line Lists and Rovibrational Assignments.

Monodeuterated methane (CHD) contributes greatly to absorption in the 1.58 μm methane transparency window. The spectrum is dominated by the 3ν band near 6430 cm, which is observed in natural methane and used for a number of planetary applications, such as the determination of the D/H ratio.