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Task: uvamp Purpose: Annular averages a uv dataset in bins. Prints and plots results. Categories: uv analysis UVAMP reads a uv dataset, bins the data in annuli according to uv distance and prints/plots vector averaged amplitude versus uvdist. Statistical error bars and the expected amplitude for zero signal are calculated. Key: vis The name of the input uv data set. No default. Key: select The normal uv selection commands. Key: line The normal uv linetype in the form: line,nchan,start,width,step The default is all channels (or all wide channels if there are no spectral channels). The output will consist of only spectral or wideband data (but not both). If spectral averaging is performed (``width'' not equal to 1), then the output will be written as a single spectral window. Key: ref The normal reference linetype, in the form: line,start,width The default is no reference line. Key: stokes If a value is given, uvamp will work with the specified polarizations. Normally this should be set to stokes I if the data includes polarizations. Key: options This gives extra processing options. Several options can be given, each separated by commas. They may be abbreviated to the minimum needed to avoid ambiguity. Possible options are: 'nocal' Do not apply the gains file. By default, UVAMP applies the gains file in copying the data. 'nopol' Do not apply polarizatiopn corrections. By default UVAMP corrects for polarization cross-talk. 'nopass' DO not apply bandpass corrections. By default UVAMP corrects for the bandpass shape. 'ampscalar' Applies vector averaging to work out the averaged visibility phase, but scalar averaging to find the averaged visibility amplitude. Key: bin Number of bins, width of bins, and units of bin width. Up to 200 bins are allowed. The units for bin width may be either nsec or klam. The default unit for bin width is nsecs. Default values: 30,40,nsec Key: offset RA-Dec offset of desired phase center relative to phase center of original uv dataset in arcseconds. Source of interest should be at the phase center in the typical use of this program. Default = 0.0,0.0. Key: type Calculate the amplitude and standard deviation for each bin based on the real and imaginary components (total) or just based on the real component (real). The "real" option is useful if your expected source visibility is entirely real -- i.e. a point source or circularly symmetric source at the phase center. Possible options are "total" and "real". Default: total. Key: device Plot device name. If not specified, no plot is created. Key: log Log file name. Default is no log file.