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SMOOTH copies R into T, then degrades the frequency/velocity resolution
of R according to the selected method. If the R buffer also provides As-
sociated Arrays, the smoothing method is also applied to them, except
for the method NOISE where this is not relevant. It is not yet possible
to provide a custom smoothing method for the Associated Arrays.
The arguments are used to specify the method :
- HANNING (default)
The new spectrum has twice less channels and twice less resolution.
- GAUSS Width
Convolves (by multiplication in the Fourier plane) by a gaussian of
specified width in current X units. Because this method does not
support bad values in the Fourier plane, bad channels are interpo-
lated before use.
- BOX Nchan
Averages Nchan adjacent channels to produce a spectrum with Nchan
less resolution and channels.
- NOISE Flux Nc
For each channel, sums at most Nc neighbouring channels until a to-
tal flux Flux is reached in the sum. Then attributes the average
value (sum divided by number of channels added) to the channel. This
smoothing is non-uniform, strictly positive, and has an obvious ten-
dency to produce wings...