WSClean version 3.1¶
Released 2022-04-01
New/changed dependencies:
To make use of IDG, WSClean 3.1 requires IDG version 1.0 or newer.
To make use of EveryBeam, WSClean 3.1 requires EveryBeam version 0.3.1.
Summary: Facet-based imaging is significantly improved, and now supports applying per-facet solutions (from H5Parm files) and beam corrections (from EveryBeam). Stokes-I-only imaging with IDG imaging is now significantly faster. WSClean 3.1 also adds experimental support for GMRT primary beam correction.
Major & visible changes¶
Support time-direction baseline-dependently averaged data from DP3.
Reduce disk-access during IDG Stokes I imaging by not storing XY/YX to disk, and enable the faster IDG Stokes I mode when possible.
Automatically use the primary beam corrected image (
...-pb.fits
) file when predicting with beam correction.Cache average beam to disk in IDG mode to reduce memory usage.
Add support for the GMRT beam (scientific validation still in progress).
Add a beam-normalisation-mode option to control EveryBeam’s normalisation mode.
Support multiple h5 files in facetting mode.
Introduce
-pb-grid-size
and deprecate-pb-undersampling
.
Bug fixes¶
Report error when user asks for incorrect channel selection.
Fix certain selection parameters that no longer worked in reorder mode (e.g. even/odd timestep selection).
Correctly normalize reported flux levels for squared channels.
Fix a crash with the
-reuse-dirty
option in certain modes.Fix segmentation fault when using
-reuse-psf
with IDG.Fix masked parallel deconvolution.
Fix beam + H5 solution application in facetting mode.
Fix possible
-facet-regions
mismatch with H5Parms.Support differential lofar beam in facet-based imaging.
Support scalar gain corrections in facet-based imaging.
Do not apply beam or solutions to PSF in facet-based imaging.
Fix unset threadcount value in imageweights class.
Fix IUWT. Because of code clean-ups in Nov 2020, the IUWT deconvolution option was no longer producing correct results.
Fix channel selection issue for non-uniform multi-SPW sets (#79).
Fix channel selection issue for multi-SPW set with no-mf-weighting (#105).
Fix rare crash caused by uninitialized array.
Fix compilation on hurd-i386.
Other significant code changes¶
WSClean now requires a compiler that supports C++17.
Add support for gcc versions 11 and 12.
Lots of refactoring.
Preparations to split off deconvolution code as a separate reusable module.
Several documentation improvements / updates.
Better support and error reporting for missing git submodules.
Many new unit and system tests.