1.7 In Version 3.7 and previous ones down to 3.0

Corrected 06-Sep-2023, Discovered 30-Jul-2023 PIPELINE was eating too much memory, leading to stall and crash.
13-Jun-2023 Ensure the MODEL command works correctly on Mosaics.
Corrected 10-Jun-2023, Discovered 15-Nov-2022 UV_RESTORE in Mosaic mode was leading to subsequent crashes if the channel range is restricted by UV_MAP because a single beam cannot be applied to all channels.
This is often the case for ALMA data, because of the shift implied by the Doppler correction when creating the UVFITS files. A work around is to manually drop the edge channels by reading a coherent range of channels, and over-writing the UV data.
06-Jun-2023 Introduce the LOG command
03-Jun-2023 MAP_POLAR/ANGLE option to plot B-field directions.
25-May-2023 Bug correction in UV_REWEIGHT (wrong noise estimate if strong signal).
15-May-2023 Improve PRIMARY command syntax.
03-May-2023 Add the PLAIT command.
Corrected 25-Apr-2023 A missing initialization of CHFLAG (wrong size) was resulting in flagged visibilites in /MODE CONT.
24-Mar-2023 Bug correction in MAP_CONTINUUM. SIZE and CENTER units not properly converted.
Corrected 08-Mar-2023 READ was not closing properly FITS files when using the cache mechanism.
Corrected 07-Mar-2023 MASK was working extremely slowly on 2-D data sets.
Corrected 03-Mar-2023 UV_SHIFT was no longer working on degenerate 1-field Mosaic since introduction of the Sault mosaic mode (05-Jan-2023).
23-Feb-2023 Significant refurbishment of the plotting scripts and of their documentation and help tools.
23-Feb-2023 Implementation of a COMPARE command that allows side-by-side comparison of two data cubes.
Corrected 22-Feb-2023 UV_RESAMPLE, UV_COMPRESS, UV_HANNING, UV_SMOOTH were no longer handling correctly channels flagged by the UV_FILTER command since the introduction of the UV_FLAG /RESET option on 03-May-2022.
17-Feb-2023 Complete the implementation of COMBINE with automatic spectral resampling and spatial reprojection when needed.
17-Feb-2023 Support for INDEX operation in MAP_COMBINE and COMBINE, and for blanking values.
17-Feb-2023 Ensure MAP_CONVOLVE preserves flux when units are in Jy/beam and a proper beam size can be defined.
17-Feb-2023 Add support for blanking values in MAP_RESAMPLE
26-Jan-2023 Allow SLICE to call the cursor, and SHOW to display degenerate 2-D arrays as a 1-D plot.
Corrected 25-Jan-2023 The SHOW UV-Like-Data was crashing, working only for the current UV data.
24-Jan-2023 Add the /DIRECTORY option to commands SHOW, VIEW, EXPLORE, INSPECT_3D.
20-Jan-2023 Add the MAP_CONVOLVE command to spatially smooth data cubes.
Corrected 20-Jan-2023 The casagildas() tool provided by IMAGER to CASA to export MS in UVFITS file occasionally produced additional UVFITS files containing only part of the data for some spectral windows. It also sometimes failed on specific spectral setups, where the same frequency occured for one narrow band and one wide band window.
05-Jan-2023 Complete implementation of the SAULT Mosaic construction method. Modified the MOSAIC command for this.
15-Nov-2022 Add the /MODE option to the PIPELINE command, with 4 modes: CONTINUUM, SPLIT, ALL or SURVEY.
14-Nov-2022 Debug use of MAP_CENTER variable in various commands (for Mosaics, UV_SELF , UV_SHIFT).
08-Nov-2022 Reorganize commands in languages: EXTRACT, SLICE and POPUP are now part of the Display\ language
Corrected 08-Sep-2022 Bug correction in EXTRACT command.
05-Sep-2022 Add the /ASYMMETRIC option of MAP_SMOOTH and UV_SMOOTH
05-Jul-2022 Add the MAP_POLAR command This corresponds to revision 3.4-1 of the Documentation.
29-Jun-2022 Ensure READ handles properly Random Frequency Axis in UVFITS format
29-Jun-2022 Ensure UV_EXTRACT works with Random Frequency Axis
Corrected 29-Jun-2022 STOKES command had incorrect derivation from H-V polarization
Corrected 09-Jun-2022 Debug UV_FLAG command - Allow to use without Display.
22-Apr-2022 Improve UV_PREVIEW command
Corrected 13-Apr-2022 MAP_COMBINE and COMBINE were not supporting big files.
12-Apr-2022 Support for command STOKES on internal buffers.
Corrected 12-Apr-2022 UV_RESIDUAL was not working on a non-sorted Mosaic data set. This could only happen by reading the Clean Component Table after reading the UV data, without any imaging step.

Changes in Version 3.3

23-Mar-2022 Introduce the IMAGER\ language. Implement the PIPELINE command there, and some miscellaneous (previously user-defined) commands like TIPS and POPUP

Changes in Version 3.2

18-Mar-2022 Add the CLEAN /RESTART capability
10-Mar-2022 Improve dirty beam related commands behaviour: replace MAP_BEAM_STEP by BEAM_STEP, use BEAM_SIZE to specify beam shape.
Corrected 09-Mar-2022 CCT_MERGE Concatenation was improper
07-Mar-2022 Allow WRITE BEAM /APPEND in all cases
Corrected 07-Mar-2022 Beam size derivation was incorrect when an ANGLE was specified
Corrected 08-Feb-2022 UV_RESTORE was not using fixed beam size.
08-Feb-2022 Implement the CLEAN_STOP syntax in CLEAN
Corrected 18-Jan-2022, Discovered 17-Jan-2022 only SINGLEDISH data was incorrectly read, probably since 20-Sep-2021 (v1.53 of read.f90). Improper values were thus used by the UV_SHORT command.
Corrected 12-Jan-2022 Mosaic offsets were improperly computed by command UV_FIELDS since 29-Jul-2021 (bug reported 10-Jan-2022). The script @ fits_to_uvt was thus leading to wrong pointing offsets.
10-Jan-2022 Implement the LOAD command in VIEWER.
Corrected 10-Jan-2022 A improper interaction between scripts was causing strange behaviour when switching between EXPLORE and INSPECT_3D commands.
07-Jan-2022 Implement SHOWPV and improve transposed data display.
Corrected 06-Jan-2022 The SIC command DEFINE IMAGE failed on large FITS files. This prevented SHOW and VIEW to work directly from these files.
06-Jan-2022 Allow direct READ of FITS data cubes.
03-Jan-2022 Improve syntax of COMBINE
Corrected 18-Dec-2021 UV_TIME produced incorrect results on tables with different weights per channel (e.g. those produced by UV_MERGE /MODE CONCATENATE).
17-Dec-2021 Improve UV_CHECK BEAM and FIT commands.
16-Dec-2021 Add the UV_MERGE /MODE CONCATENATE command to stitch adjacent or overlapping spectral windows. Imaging is in general only possible using BEAM_STEP = 1 after this, so far.
13-Dec-2021 Implement a fast, reliable version of "statcont" through the MAP_CONTINUUM command (run time $< 40$ secs for a 28 Gbyte data set on a 64-core machine)
13-Dec-2021 Globally revised the Robust weighting scheme. Speed up by huge amount for large (> 10 MegaVis) number of visibilities. UV data sorting not required anymore.
Corrected 13-Dec-2021 Remove occasional infinite loop in MAP_CONTINUUM with method GAUSS (discovered 01-Dec-2021)
08-Dec-2021 Change the CASA - GILDAS interface. Use pure-Python scripts and put them in the $HOME/.casa directory to have a CASA-version independent solution.
07-Dec-2021 A missing initialization was causing UV_RESTORE to use the slow mode on some compiler versions.
06-Dec-2021 Speed up (by a factor 5-10) the Natural weighting scheme when there is only 1 channel.
19-Nov-2021 Create the VIEWER program, that only contains the DISPLAY\ language.
19-Nov-2021 Expand the COMMAND ? Key mechanism to many commands.
Corrected 18-Nov-2021 UV_REWEIGHT syntax bug
18-Nov-2021 Add the STATISTIC /UPDATE and FIT /JVM_FACTOR commands

Changes in Version 3.0

31-Oct-2021 Introduce new DISPLAY\ language. Move commands CATALOG, COLOR, FIND, EXPLORE, INSPECT_3D, SHOW, STATISTIC, and VIEW from their initial languages to this one.
Improvements in control variables of SHOW and related commands (e.g. allow unit of contours to be specified).
Corrected 28-Jun-2021 UV_SHIFT bug correction for "false" mosaics (ID and MOFF columns)
Corrected 28-Jun-2021 UV_SORT bug correction for /FILE option
Discovered and Corrected 27-Oct-2021 MAP_INTEGRATE lead to wrong units and noise level.
Discovered and Corrected 04-Apr-2021 MULTISCALE was using an incorrect convergence strategy since years... Results were sub-optimal, and convergence was unduly slow.
17-Jun-2021 Add SPECIFY FREQUENCIES command for VLA data
01-Jun-2021 Allow MULTISCALE Clean on Mosaics, better FIT command.