Keywords: imager-bugs

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## Functional changes from previous versions

Changes in Version 3.3

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

Changes in Version 3.2

- 18-Mar-2022 Add the magenta`CLEAN /RESTART` capability
- 10-Mar-2022 Improve dirty beam related commands behaviour: replace blue`MAP_BEAM_STEP` by blue`BEAM_STEP`, use blue`BEAM_SIZE` to specify beam shape.
- 07-Mar-2022 Allow magenta`WRITE BEAM /APPEND` in all cases
- 08-Feb-2022 Implement the blue`CLEAN_STOP` syntax in magenta`CLEAN`
- 10-Jan-2022 Implement the magenta`LOAD` command in red VIEWER.
- 07-Jan-2022 Implement magenta`SHOW`PV and improve transposed data display.
- 06-Jan-2022 Allow direct magenta`READ` of FITS data cubes.
- 03-Jan-2022 Improve syntax of magenta`COMBINE`
- 17-Dec-2021 Improve magenta`UV_CHECK BEAM` and magenta`FIT` commands.
- 16-Dec-2021 Add the magenta`UV_MERGE /MODE CONCATENATE` command to stitch adjacent or overlapping spectral windows. Imaging is in general only possible using blue`BEAM_STEP = 1` after this, so far.
- 13-Dec-2021 Implement a fast, reliable version of "statcont" through the magenta`MAP_CONTINUUM` command (run time 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.
- 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 magenta`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 red VIEWER program, that only contains the blue`DISPLAY\` language.
- 19-Nov-2021 Expand the magenta`COMMAND ? Key` mechanism to many commands.
- 18-Nov-2021 Add the magenta`STATISTIC /UPDATE` andmagenta`FIT /JVM_FACTOR` commands

Changes in Version 3.0

- 31-Oct-2021 Introduce new blue`DISPLAY\` language. Move commands magenta`CATALOG`, magenta`COLOR`, magenta`FIND`, magenta`EXPLORE`, magenta`INSPECT_3D`, magenta`SHOW`, magenta`STATISTIC`, and magenta`VIEW` from their initial languages to this one.
- Improvements in control variables of magenta`SHOW` and related commands (e.g. allow unit of contours to be specified).

Changes up to Version 2.8 dated of Jan 31, 2021

- 17-Jun-2021 Add magenta`SPECIFY FREQUENCIES` command for VLA data
- 01-Jun-2021 Allow `MULTISCALE` Clean on Mosaics, better magenta`FIT` command.
- 14-Dec-2020 magenta`SPECTRAL_CLEAN` command
- 31-Jan-2020 Add magenta`CCT_CLEAN` command
- 13-Nov-2020 Add magenta`MAP_SMOOTH` command
- 26-Oct-2020 Add magenta`UV_SMOOTH` command
- 11-Sep-2020 Add magenta`KEPLER /MASK` command for Mask creation
- 03-Sep-2020 Better behaviour of command magenta`UV_TIME`
- 01-Sep-2020 Improve magenta`FIT` command for Mosaics

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

- 13-Nov-2020 Speed-up the magenta`UV_RESTORE` command.
- 30-Jul-2020 Miscellaneous improvements in the magenta`KEPLER` command
- 26-May-2020 Implementation of the magenta`UV_DETECT` command, that encapsulates all actions needed for matched filtering in UV plane.
- 14-May-2020 Proper implementation of the magenta`UV_CORRRELATE` command, that performs matched filtering in the UV plane
- 13-May-2020 magenta`MODEL` defines the blue`UV_MODEL` variable
- 25-Mar-2020 Implementation of the magenta`KEPLER` command, that allows optimal detection of spectral lines in Keplerian disks, and estimates of radial profiles.
- 19-Mar-2020 Proper implementation of the magenta`MODEL` command, with the magenta`MODEL /MODE` option and several channels.
- 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
- 27-Feb-2020 magenta`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 magenta`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 magenta`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 magenta`UV_MERGE` compliant with its Help: allow to merge Line data sets in Continuum mode.
- 10-Feb-2020 magenta`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 magenta`MAP_COMPRESS` syntax was incorrectly handled. The `HELP MAP_COMPRESS` is still unclear, however.
- 18-Dec-2019 magenta`VIEW CCT` optimized by coding the component compression after a magenta`MULTI`.
- 17-Dec-2019 magenta`SELFCAL` optimization (was using slow mode in magenta`UV_RESTORE` by default).
- 27-Nov-2019 magenta`UV_CHECK /FILE` implemented.
- 27-Nov-2019 magenta`UV_TIME /FILE` implemented.
- 27-Nov-2019 magenta`UV_SHIFT /FILE` implemented.
- 20-Nov-2019 Make sure magenta`UV_PREVIEW` also works for 1 channel.

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