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CHANGELOG.md

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DP3 Changelog

Upcoming release

Improvements

  • Many internal quality improvements to the input step.

[6.2] - 2024-08-29

New features

  • Support reading extra data columns from the input Measurement Set(s).
  • Support extra (model) data columns in applybeam step.
  • Add wgridderpredict step, which uses ducc wgridder for image based prediction.
  • Add rotationdiagonalmode setting to ddecal step.
  • Add smoothnessspectralexponent setting to ddecal step.
  • Add usedualvisibilites setting to ddecal step, for using XX/YY visibilities only.
  • Support a restricted LBFGS solution range in ddecal and demixer.
  • Add skipstations setting to applybeam step.
  • Support DD intervals in bda ddecal step.
  • Add wscleanwriter step which writes data in WSClean reordered format.

Improvements

  • Interface change: Remove start channel from DPInfo constructor, also in Python.
  • Format python files using isort.
  • Use Logger for all output. Do not allow std::cout / std::cerr anymore.

Bug fixes

  • Fix using msin.startchan / filter.startchan when updating a Measurement Set.

[6.1] - 2024-06-18

  • Support EveryBeam 0.6 (in addition to EveryBeam 0.5.8)
  • Faster beam predict by using cached time directions
  • Add support for dish telescopes like SKA-mid
  • Add preliminary clipper task for VLBI processing
  • Reduce memory in predict step
  • Read sky model only once to speed up processing
  • Various AARTFAAC processing improvements
  • More use of XTensor
  • Some use of AVX(2) instructions to speed up tasks
  • Improve threading and use of threadpool
  • Fix wrong h5 time axis when solint larger than number
  • Fix prediction for source models with only negative polarized sources
  • Fix compilation on platforms where size_t != 64 bit
  • Fix multiple baseline selection (!1255)
  • Fix ApplyCal with full-Jones correction
  • Various small bugs and code improvements

[6.0] - 2023-08-11

New features

  • Optional support for Sagecal (libdirac), if that is installed.
  • Re-using model visibilities in multiple steps (e.g. ddecal steps) is now possible through the 'extradata' feature.
  • Python bindings are thoroughly refactored; entire DP3 pipelines can now be constructed from Python.
  • DP3 now has some steps with increased performance specifically for the AARTFAAC instrument.

Improvements

  • Under the hood some casacore structures were replaced by xtensor structures, which may reduce memory usage.
  • Deprecate the use of FULL_RES_FLAGS. These are not written anymore.
  • DP3 now requires EveryBeam v0.5.1
  • Experimental use of AVX and XSIMD features to speed up various operations.

Bug fixes

  • Fix predicting sky components with negative n-value (further than 90 degrees from phase centre) - note that this bug did not affect the demix step.