## Functional changes from previous versions

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.
- 07-Mar-2022 Allow WRITE BEAM /APPEND in all cases
- 08-Feb-2022 Implement the CLEAN_STOP syntax in CLEAN
- 10-Jan-2022 Implement the LOAD command in VIEWER.
- 07-Jan-2022 Implement SHOWPV and improve transposed data display.
- 06-Jan-2022 Allow direct READ of FITS data cubes.
- 03-Jan-2022 Improve syntax of COMBINE
- 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 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 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.
- 18-Nov-2021 Add the STATISTIC /UPDATE and FIT /JVM_FACTOR commands