Abstract
New spectrophotometric CCD-observations of Saturn were performed in 2003 -2004 within the framework of an international effort in support to the Cassini space mission through 2008.A series of Saturn's spectra have been obtained and analyzed.Our purpose is to study current latitudinal variations in molecular absorption bands during the rings-opening maximum and best visibility conditions for observation of the southern hemisphere of Saturn.A comparison with data of previous years shows the presence of seasonal variation connected with changes in the insolation regime on Saturn.