2.2.3 spase://SMWG/Instrument/PROBA2/LYRA Proba 2 Sun Watcher using APS detectors and Image Processing (SWAP) 2015-06-15T00:00:00Z The Large Yield RAdiometer (LYRA) is a solar X and UV filter photometer that monitors the solar irradiance in four selected ultraviolet bands: the Lyman-alpha line at 121.6 nm, the 200-220 nm Herzberg continuum range, the 17-80 nm aluminium filter range and the 6-20 nm zirconium filter range. spase://SMWG/Person/Marie.Dominique PrincipalInvestigator http://proba2.oma.be/about/LYRA PROBA2 Science Center LYRA Photometer Photometer Sun Watcher using APS detectors and image Processing spase://SMWG/Observatory/PROBA2