HIRDES—The High‐Resolution Double‐Echelle Spectrograph for WSO‐UV

We introduce the High‐Resolution Double‐Echelle Spectrograph (HIRDES), which is planned to be the main instrument for the World Space Observatory Ultraviolet (WSO‐UV), a 1.7 m UV telescope. Within HIRDES the 102–310 nm spectral band is split to feed two echelle spectrographs covering the UV range 174–310 nm and the vacuum‐UV range 102–176 nm with high spectral resolution (R>50000). The technical concept is based on the heritage of two previous ORFEUS SPAS missions. We describe results of the phase‐B1 development activities.