Three Data Reduction Methods for Synthesis Telescope Observations

For the reason of complex array arrangement and complicated receiver system,there exist many new error sources in synthesis telescope observations in addition to the normal errors faced by single dish observations.In this paper three main data reduction methods for synthesis observations were summarized.They are standard method(using calibration sources),self-calibration,and redundancy-self-calibration.Efforts have been paid for the classification of error sources and the reduction procedures of three methods.