Version 4.6 is a critical release with one major bug correction and a few smaller ones.
MAJOR: In Version 4.5, a bug was introduced in the basic phase shifting routine for
UV data. As a results, Mosaics could only be properly imaged if the UV data had a
common phase center for all fields, but no error message was issued otherwise.
Furthermore, since the basic shifting routine was the problem, there was no
way to set a common phase center with IMAGER.
The bug escaped detection in the test suite because all test mosaics were already
in the proper mode.
Command
UV_CIRCLE could crash if issues after command
UV_CONTINUUM. This
was due to a lack of update of the min-max of the baseline lengths. A work-around was
to use
HEADER UV/EXTREMA after
UV_CONTINUUM.
Command
UV_MERGE/CONTINUUM would occasionally ignore the specified
reference frequency, or even crash due to initialized value.
It also includes added and improved commands:
MASK THRESHOLD with
REGION keyword now order labelled regions by decreasing
flux, providing an easier selection of regions of interest.
Added command UV_SUBTRACT that allows a visibility based continuum subtraction
Command UV_REWEIGHT returns weight factor as SIC variable
UV_WEIGHT_SCALE.
