Next: PRIMARY
Up: Description of Associated Tasks
Previous: CLEAN
Contents
Index
MX
MX : Make and Clean maps from UV data
This task combines UV_MAP and CLEAN in a single step. The CLEAN algo-
rithm is similar to the CLARK method, but with major cycles operating
directly on the ungridded UV table rather than in the image plane. Ac-
cordingly, there is aliasing only of the residuals, not of the clean
components.
MX can process all planes of a data cube at the same time, but a sepa-
rate list of component will be produced for each plane. The cleaning
cannot be restarted.
The mapping process is identical to UV_MAP. It makes a map from UV data
by gridding the UV data using a convolving function, and then Fast
Fourier Transforming the individual channels. However, MX always pro-
duces a single beam for all channels, thus neglecting frequency change
between channels.
MX allows to shift the map center and rotate the image, by shifting the
phase tracking center and rotating the UV coordinates of the input UV
table.
MX produces several output maps, of name derived from MAP_NAME$, and a
residual output UV table.
Gildas manager
2014-07-01