pyCHMP v0.3.0

Microwave SRH / NORH / SSRT PSF header paths with IDL-parity beam ports and compare
examples, on top of the 0.2.0 observational EUV/map-store stack.

Added

• Microwave SRH beam header support in pychmp.psf: Viktor/srhimages σ axes
  (BEAM_SA / BEAM_SB / BEAM_PHI, BEAM_P==1 only) and gx_simulator
  MakeSRHbeam correlated σ (BEAM_SX / BEAM_SY / BEAM_RHO). σ values are
  converted to FWHM for the existing elliptical-kernel path; frequency scaling
  remains enabled for both radio forms.
• NORH clean-beam PSF path (pychmp.norh_beam): in-tree port of SSW
  norh_prog2pinf / norh_beam and gx BeamFitNoRH/FitBeam. Nobeyama FITS
  headers with PMAT* + OBS-FREQ resolve to a frequency-scalable Gaussian
  ellipse without an IDL runtime. Validated against Viktor’s IFZ sample
  (ifz140202_022005_corrected) vs IDL reference beam samples and fit params.
• Example examples/python/compare_norh_ifz_beam_python_vs_idl.py: side-by-side
  Python vs sswidl norh_beam plot + numeric metrics for any NORH IFZ/FITS
  (--ifz / PYCHMP_NORH_IFZ); P-angle from live IDL get_rb0p or header SOLP.
• SSRT restoring-beam path (pychmp.ssrt_beam): in-tree port of gx
  GetSSRTangles / MakeSSRTbeam / BeamFitSSRT. Example
  examples/python/compare_ssrt_beam_python_vs_idl.py compares Python vs IDL
  for any observation time, classic SSRT map .sav, or map FITS via
  --fits (time from DATE-OBS / TIME-OBS).
• SSRT FITS header routing in pychmp.psf: headers identified as SSRT
  (TELESCOP/INSTRUME/ORIGIN containing SSRT or Badary AOR) resolve the
  restoring beam from observation time via BeamFitSSRT, before the generic
  BMAJ/BMIN path used by EOVSA. Image data are not required. Time cards
  accept ISO/IDL forms and classic Badary DATE-OBS=DD/MM/YY plus
  TIME-OBS. The SSRT beam is monochromatic (~5.7 GHz) and does not
  enable inverse-frequency scaling. sunpy is imported only inside
  GetSSRTangles, so EOVSA/BMAJ resolve does not load it.

Changed

• SRH header resolve soft-fails on unsupported BEAM_P≠1, non-positive
  BEAM_SA/BEAM_SB, or invalid BEAM_SX/BEAM_SY/BEAM_RHO, falling
  through to later routes (correlated σ, NORH, SSRT, or BMAJ) instead of
  aborting the resolver.
• NORH/SSRT IDL parity tests that need local fixtures are marked
  external_fixture and skip cleanly when PYCHMP_NORH_IFZ /
  PYCHMP_SSRT_IDL_BEAM (or sibling SRH-NORH-4CHMP/) are absent.

Known limitations

• Super-Gaussian SRH BEAM_P≠1 is not converted to a kernel; the resolver
  falls through to SX/SY or BMAJ when present.
• NORH beam uses header SOLP (degrees) rather than recomputing get_rb0p;
  on standard products this matches IDL to ≲0.01°.

Full notes: CHANGELOG.md