Task: uvfft Purpose: Fourier transform a sequence of selected uv-data. Categories: uv analysis UVFFT takes a 1-D Fourier transform of a uv-data sequence. If the sequence is a time series, then the FFT is a fringe rate spectrum. If the sequence steps the delay center, then the FFT is a bandpass. Key: vis The input UV dataset name. No default. Key: select This selects the data to be processed, using the standard uvselect format. Default is all data. Selecting more than one baseline does not make much sense. Key: line Standard linetype of data to be tranformed, in the form: type,nchan,start,width,step where type can be `channel' `wide' or `velocity'. The default is wide,2,1,1,1. The maximum number of channels which can be processed is 8. Key: size The length of the sequence for the Fourier transform. uv-data points in excess of the size of the transform are omitted. Must be a power of 2. The default is 128. Key: log The list output file name. The default is the terminal. Key: device standard PGPLOT device, e.g. /xw Key: delay Step size for stepped delay center. FFT is bandpass function. Default=0 Delay center not stepped. FFT is fringe frequency spectrum. processing options: test - substitute test functions for data into Fourier transform.

Generated by miriad@atnf.csiro.au on 21 Jun 2016