CASA/JIVE VLBI Coordination Meeting

2021 Feb 24 @ 1500UTC


  • Future Meeting dates (usually last Wed of the month):
    • 2021 Mar 31 @ 1400 UTC
    • 2021 Apr 28?

General Admin

  • General Status w.r.t. Coronavirus measures
    • NRAO/ALMA:
      • NRAO in North America continues work@home for foreseeable future. Infections rates declining, vaccinations ramping up.
      • ALMA progressing with array restart plans; 10+ antennas science ~ready as of Feb 11; decisions expected ~this week on starting "Initial + Basic Science Operations Phase"
      • Science/computing staff continuing work-at-home for now
  • CASA Release Schedule
    • CASA 5.8/6.2: Development finished. Validation wrapping up. VLBI-specific tickets reviewed below...
    • CASA 5.9/6.3: "Bug-fix" release ~June?
    • CASA 6.2.1: ALMA-specific (PL) bug-fixes ~September
    • CASA 6.4: End of year?
  • Requirements collation: 2020 May 07 document / VLBA Costing/Prioritization (2020 May 21)
    • CASA 5.9/6.3 (and 6.2.1) Planning underway
  • (Ryan) CNGI/ngCASA Status:
    • Working toward demo 'release' in March
    • FYI: CNGI Development instructions
    • (Mark) EHT SDC working group is interested in hearing about ngCASA (next meeting Jan 28 1400 UT)
      • ~15min summary from a ngCASA teammember? RR or JW? (George to ask JW... DONE 2021/01/20)
  • Admin issues
    • CASA Docs now hosted on readthedocs platform:
      • Edit permissions for JIVE provided by Bjorn/Ryan
    • DIY casa5 tarball build instructions can be found here
    • casa6 build issues: formal instructions for plotms, CASAshell, casa5/6 co-exist, c++ unit tests in casa6.
  • Meetings/workshops of relevance
    • Ilse has submitted URSI GASS (J11) abstract?
    • CASA Internal Virtual F2F meeting Feb 1-5
    • Jan-Willem gave great summary of CNGI/ngCASA to EHT SDC group Feb 11. Well-received, some followup expected...
    • RCI seminars: (Current series wrapped up 19 Feb, but slides/video for many talks are available.)
  • VLBI Integration Branch: CAS-13295
  • Other admin?


  • CASA 5.8/6.2:
    • JIRA (VLBI) Status
      • Notables:
      • (George) CAS-12735: Frequency meta-info (includes generalized fix for CAS-12553, and several other bug tickets)
        • Progress continues, but now deferred to 6.3....
      • (Des) CAS-12765 (wide-spaced spws): waiting for freq meta fix in CAS-12735
      • (Neal) CAS-13184: accor corrdepflags. DONE.
      • (Mark) CAS-8537: gain curve. DONE.
      • (Neal) CAS-12736 (revised accor test). DONE.
      • (Mark) CAS-12989 (eMerlin crosshands) Validation complete (Anita Richards). Need hard-to-get eMerlin dataset for proper verification test....
      • (Pam Harris) CAS-11318: Fringe-fitting solution plotting has been implemented in plotms! DONE.
      • (CAS-13056, CAS-13003, and possibly CAS-13005 to slip to next cycle)
  • CASA 6.3 prioritization underway
    • (Justin) Anything to report?
  • Other development topics
    • (Des) Memory leak in fringe-fitter? (from big EHT case by Janssen). Apparently not a leak, just a large memory case. (JIRA ticket?)
      • Des has introduced some memory management improvements
    • (Mark) AveragingTvi2 and fringe fitting CAS-13287
      • Meta-data problems when preavg < solint? nRows(!) in VB2 is wrong when baseline (antenna) population varies within solint
      • Difficult to debug... Makes sense to bypass preavg....this nominal fix in integration branch.
    • (Mark) NaNs in imported Tsys. CAS-13270. (defer to 5.9/6.3)
    • (Des) Polarization combination in fringe fitting?
    • (Justin) f.d. scaling difference with AIPS? Lucas Hunt at USNO. acscl (avoid edge channels in accor)?
    • CAS-12485: OTF weight munging for solve (Can we complete validation and deploy? Des seeking interested users at JIVE)
    • (Mark) VLBA pulsar binned data.... requires casacore fix to importfitsidi (PR pending, CAS-8550). will be merged via gaincurve casacore changes;
      • Probably defer... also includes fix for "single-IF" fitsidi.... waiting for unrelated casacore validation in casa (SYSPOWER UVFITS export).
    • (Mark) Generalized polarization basis conversion (JIRA ticket?)
      • Implementing now through a Generic frequency-dependent Jones matrix
    • (George/Justin) to coordinate initial testing on CASR-463 (TEC) to better characterize basic requirements (also CAS-13040 re TEC retrieval changes)
    • (Justin) User-defined intents... pushback from PL? Not really; probably just due diligence polling stakeholders.


  • ?

-- GeorgeMoellenbrock - 2021-02-23
Topic revision: r3 - 2021-02-24, MarkKettenis
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