[CLEAN\]MX [FirstPlane [LastPlane]] [/PLOT Clean|Residu] [/FLUX Fmin
Fmax] [/QUERY]
Make and deconvolve maps starting from a UV table. It combines UV_MAP
and CLEAN in a single step.
The mapping process is identical to UV_MAP. It makes a map from UV data
by griding the UV data using a convolving function, and then Fast Fouri-
er Transforming the individual channels. However, MX always produces a
single beam for all channels, thus neglecting frequency change between
channels. MX enables 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.
The CLEAN algorithm is similar to the CLARK method, but with major cy-
cles operating directly on the ungridded UV table rather than in the im-
age plane. Accordingly, aliasing affects only of the residuals, not the
clean components. It is thus more accurate but also slower than CLARK as
it asks for the gridding step at each major cycle. MX also shares the
same limitation as CLARK on large sidelobes.
The user can control the algorithm through SIC variables. New values can
be given using "LET VARIABLE value". For ease of use, and whenever it is
possible, a sensible value of each parameter will automatically be com-
puted from the context if the value of the corresponding variable is set
to its default value, i.e. zero value and empty string. A few variables
are initialized to "reasonable" values.
[CLEAN\]CLEAN ?
Will list all main CLEAN_* variables controlling the CLEAN parameters
for the current METHOD.
HELP CLEAN Variables will give a more complete list.
[CLEAN\MX ?
Will list all MAP_* and CLEAN_ * variables controlling the MX param-
eters.
Subsections
Gildas manager
2023-06-01