[CLEAN\]UV_RESTORE /SPEED Mode [/COPY]
Create a Clean image from the current UV data set and the Clean Compo-
nent list, using the specified Mode to remove the Clean Components be-
fore imaging the residuals.
The argument Mode may be one of the following keyword:
AUTO Automatically select the "fastest" method, according to the
current number of Visibilities and Clean components.
FFT Subtract Clean Components by FFT and interpolation onto
individual visibilities.
PRECIS Subtract the Clean Components by simple Sin/Cos phase terms
for each visibility
The PRECIS mode is faster for a small number of visibilities and Clean
components, while the FFT mode is faster for large ones.
Instead of the above keywords, Mode may also be a number which specifies
when the AUTO mode should switch from PRECIS mode to FFT mode. The de-
fault number to control the AUTO mode is 200 Millions (product of the
number of visibilities and average number of Clean components per chan-
nel). This value is "sticky": if changed by /SPEED, the new values is
retained until next change.
Gildas manager
2023-06-01