Changes up to Version 2.8 dated of Jan 31, 2021

• Discovered and Corrected 31-Jan-2021 UV_MAP /RANGE was producing a wrong velocity/frequency axis since 11-Dec-2020. (a line of code had disappeared).
• 14-Dec-2020 SPECTRAL_CLEAN command
• 31-Jan-2020 Add CCT_CLEAN command
• 13-Nov-2020 Add MAP_SMOOTH command
• 26-Oct-2020 Add UV_SMOOTH command
• 11-Sep-2020 Add KEPLER /MASK command for Mask creation
• 03-Sep-2020 Better behaviour of command UV_TIME
• 01-Sep-2020 Improve FIT command for Mosaics

Changes since Version 2.5 of Feb 27th, 2020, and older ones.

• Discovered and Corrected 10-Dec-2020 MODEL after UV_FIT was ending with an undue error (bug present since 2-Jun-2020)
• Corrected 8-Dec-2020 Mosaic offsets were not accounted for properly since 19-Jun-2019. The reason was a misplaced exclamation mark that transformed a key instruction into a comment in the code file. Anomalous behaviour of the Mosaic mode were reported end of November, and a test case isolated on Dec 7 for analysis, leading a prompt correction.
• 13-Nov-2020 Speed-up the UV_RESTORE command.
• Corrected 26-Oct-2020 Several bugs in UV_MERGE made it fail on some (usually large) data files, sometimes depending on the order in which they were given (discovered 15-Oct-2020).
• Corrected 14-Sep-2020 Incorrect transfer of self-calibration solution in APPLY and SELFCALAPPLY on some UV data set from ALMA.
• Corrected 11-Sep-2020 KEPLER was off by 1 pixel.
• Corrected 11-Sep-2020 Blanking was not updated in MASK APPLY
• UV_SHORT /REMOVE does not properly delete the SHORT% variable in some cases, in particular if command XY_SHORT is (or has been) used (discovered 15-Feb-2020, still pending, difficult to reproduce).
• 30-Jul-2020 Miscellaneous improvements in the KEPLER command
• Corrected 10-Jul-2020 IMAGER occasionally crashed after a sequence of UV_MAP /CONT and UV_RESTORE commands, because of a map size mismatch. This size mismatch occured when the baseline min-max of the UV data set are inconsistent with the UV data. (discovered 07-Jul-2020).
• Corrected 10-Jun-2020 KEPLER did not handle KEPLER_X0 and KEPLER_Y0 properly.
• Corrected 20-May-2020 FITS failed on large (300 GBytes..) UVFITS files. (discovered 15-Feb-2020).
• 26-May-2020 Implementation of the UV_DETECT command, that encapsulates all actions needed for matched filtering in UV plane.
• 14-May-2020 Proper implementation of the UV_CORRRELATE command, that performs matched filtering in the UV plane
• 13-May-2020 MODEL defines the UV_MODEL variable
• 25-Mar-2020 Implementation of the KEPLER command, that allows optimal detection of spectral lines in Keplerian disks, and estimates of radial profiles.
• 19-Mar-2020 Proper implementation of the MODEL command, with the MODEL /MODE option and several channels.
• Corrected 19-Mar-2020 MODEL /MINVAL threshold was erroneously transformed between Jy/beam and K.
• 11-Mar-2020 Command EXPLORE added to language BUNDLES
• 10-Mar-2020 CASA to GILDAS interface
  The casagildas() tool has been totally re-written in pure Python to avoid issues with incompatible releases of Fortran compilers and Python between CASA and GILDAS
• Corrected 10-Mar-2020 MAP_RESAMPLE may crash on some combination of values (discovered 10-Mar-2020).
• Corrected 10-Mar-2020 VIEW may fails the RANGE is non zero and the 3rd axis increment is negative.
• corrected 05-Mar-2020 UV_MAP fails after UV_RESIDUAL and SELECT UV_RESIDUAL if the initial UV data set was not sorted in XY.
• Corrected 05-Mar-2020 MULTI with non-zero value for CLEAN_NITER did not set up properly the number of components (it finds 0). SHOW CCT and UV_RESTORE could not be used after.
• 27-Feb-2020 UV_SHORT now allows to use images with non-circular beams as short spacings data. Such images can be, for example, an ACA image to be combined with ALMA data.
• 24-Feb-2020 imager-linedb.sic script converted to Python 2 and 3 compatible syntax
• 21-Feb-2020 UV_MAP was crashing on Mosaic in Robust weighting. Linked to a missing (although optional !) argument to call doweig, despite the interface was used.
• 18-Feb-2020 3D size was incorrectly set by UV_MAP on "huge" file (1200 x 1200 x 3840).
• 14-Feb-2020 Normalize message colours.
• 14-Feb-2020 Suppress blanking when not needed
• 13-Feb-2020 Make UV_MERGE compliant with its Help: allow to merge Line data sets in Continuum mode.
• 10-Feb-2020 SLICE command changes.
  The SLICE buffer had to be renamed to SLICED, as "slice()" is a built-in Python method. The axis starts now from the closest point to (0,0), leading to more intuitive slices.
• 06-Feb-2020 MAP_COMPRESS syntax was incorrectly handled. The HELP MAP_COMPRESS is still unclear, however.
• 18-Dec-2019 VIEW CCT optimized by coding the component compression after a MULTI.
• 17-Dec-2019 SELFCAL optimization (was using slow mode in UV_RESTORE by default).
• 27-Nov-2019 UV_CHECK /FILE implemented.
• 27-Nov-2019 UV_TIME /FILE implemented.
• 27-Nov-2019 UV_SHIFT /FILE implemented.
• 20-Nov-2019 Make sure UV_PREVIEW also works for 1 channel.