%0 book part,GKSS report %@ %A Doerffer, R.,Grassl, H.,Kunkel, B.,Piepen, H. van d. %D 1989 %J Advanced optical instrumentation for remote sensing of the earth's surface from space - SPIE Proceedings %N %P 117-121 %T ROSIS: an advanced imaging spectrometer for the monitoring of water colour and chlorophyll fluorescence %U %X