The short wavelength spectrometer for iso

The Short Wavelength Spectrometer (SWS) being developed for the Infrared Space Observatory (ISO) is described. The instrument is a pair of grating spectrometers, used in low orders, that will provide resolving powers of about 1000 from 3 μm to 45 μm. In combination with Fabry Perot etalons, the resolving power will be as high as 30, 000 over the 15 to 30 ym range.