Casa6

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  Rui Xue 19 Jun 2026 62f13e3abee8471ee4e7818f3c596f7af5de80b5

  CAS-14815: Improve ASP deconvolution scale optimization instability for imaging with poorly-sampled beams
  - Clamp the fitted PSF width to a minimum of 3.0 pixels to handle poorly-sampled beams.
  - Remove early return in objfunc_alglib to ensure the objective function and gradient are initialized.
  - Clamp scale size lower bound to 0.4 and zero out its gradient when clamped to stabilize optimization at the boundary.

  • casatools/src/code/synthesis/MeasurementEquations/AspMatrixCleaner.cc (version 62f13e3abee8471ee4e7818f3c596f7af5de80b5) (diffs)
  • casatools/src/code/synthesis/MeasurementEquations/objfunc_alglib.h (version 62f13e3abee8471ee4e7818f3c596f7af5de80b5) (diffs)