WSClean version 3.7

Released 2026-02-16

Summary:

Version 3.7 contains numerous new features, bug fixes and performance improvements. The most substantial new feature is the support of baseline-dependent averaging in the frequency-direction.

Full change list

• Full support for baseline-dependent averaging in the frequency direction.

• Allow facetted runs on custom polarization selection (e.g. I+V or Q+U).

• Support facetted IDG runs with facet corrections (-gridder facet-idg).

• Support for Sisco compression of model data.

• New option -fit-beam-without-negatives which can improve beam fitting in rare cases.

• Add a sub-pixel rendering option (-draw-model).

• Add a new gridder: the w-towers gridder (-gridder wtowers).

• Add -major-iteration-mode option to control Radler’s deconvolution strategy.

• Add -component-optimization option to control Radler’s optimization algorithm.

• Support for smearing corrections (still experimental).

• Allow skipping the final prediction-gridding iteration (-skip-final-iteration).

• Control number of auto-masked iterations (-auto-mask-nmiter).

Bug fixes and refactoring

• Implementation of fast IO MPI mode (using facet-shared reads and writes).

• No longer require the DATA column to exist in a Casacore MS when imaging other columns.

• Faster beam solution by using the multi-frequency EveryBeam interface.

• Base implementation of an in-memory interface was added. Full support expected in version 3.8.

• Improvement command line checking.

• Fix crash when very small facets are defined.

• Fix the use of -no-dirty with facets and intervals.

• Turn off deconvolution boosting by default.

• Initialize the model column only when neccessary and with a faster approach (sparse file).

• Fix degridding operation of single-facet runs.

• Fix a skymodel parse issue causing last keyword to be misread.

• Avoid that very small Gaussian sources disappear when rendered.

• Support for new compilers and dependent library versions.

• Support EveryBeam 0.8.x.