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Add noise to the (initially noise free) simulated UV table. The Noise parameter indicates the expected point-source sensitivity (in Jy) for the specified Bandwidth (in MHz). The channel spacing of the data is used as bandwidth if argument Bandwidth is 0 or unspecified. The default weight column is guessed by the command, but may be specified as 3rd argument if needed.
The noise is spread over visibilities according to the initial weight distribution.
Unless the /FILES option is present, the input UV data is the UV_MODEL one created by command MODEL, and the output UV data becomes the new UV_DATA, so that imaging can immediately proceed with UV_MAP.