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 pm to 45 pm. In combination with Fabry Perot etalons, the resolving power will be as high as 30,000 over the 15 to 30 pm range.
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