The Long-Wavelength Spectrometer (LWS), to be launched in the ESA's Infrared SpaceObservatory, covers the wavelength range 45-180 Ã‚Âµm at both moderate (-200) and high(-104) spectral resolving power. This paper describes how the scientific requirementswere translated into a space-qualified design.
P. E. Clegg,
"The ISO long-wavelength spectrometer", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21048N (30 November 2017); doi: 10.1117/12.2298743; https://doi.org/10.1117/12.2298743