What Does ORFEUS Stand For?

ORFEUS has more than one possible meaning :

• ORFEUS - Orbiting And Retrievable Far And Extreme Ultraviolet Spectrometer
• ORFEUS - Orbiting Retrievable Far And Extreme Ultraviolet Spectrometers

If you know of another acronym for ORFEUS, please suggest it as a new acronym for ORFEUS.