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This paper proposes a method for constructing an experimental power beampattern (PB) of RATAN-600 based on the sample of NVSS sources observed in theprocess of a deep sky survey near local zenith. The data obtained fromobservations of radio sources at wave 7.6 cm in nine bands of the survey (the2002 and 2003 sets) are used to construct vertical PB of the telescope atrather large offsets from the central horizontal section of the PB (+/-36').The experimental PBs obtained using different methods are compared and theroot-mean-square deviations of the experimental PB from the correspondingcomputed PB are determined. The stability of the power beam pattern in itscentral part (+/-6') during the RATAN-600 Zenith Field (RZF) survey (1998-2003)and the accuracies of the fluxes of the sources observed within the frameworkof this survey and included into the RZF catalog are estimated.

Study of the Power Beam Pattern of RATAN-600 During the Deep RZF Survey (1998-2003)