... RATAN has seen 'first light' from source PKS 0521-36 12 July 1974 . Since more 50000 observations were caried out in continuum. ... Three different feed-cabines (N1,2, 3) with secondary mirrors could simulteniously collect radio emission from these three sectors and be used in programs of contiuum, spectral and solar observations. ... Source . ... Prepare list of observed sources. ... In general 60-80 sources could be observed in one day. 4-5 calibrators must be include in observation set. ...