CASA/JIVE VLBI Coordination Meeting

2021 Mar 31 @ 1400UTC (NB: DST start March 14 & 28 in USA & Netherlands, respectively)


  • Future Meeting dates (usually last Wed of the month):
    • 2021 Apr 28 @ 1400 UTC
    • 2021 May 26?

General Admin

  • General Status w.r.t. Coronavirus measures
    • NRAO/ALMA:
      • NRAO in North America continues work@home for foreseeable future. Infections rates leveling (increases in some places), vaccinations ramping up.
      • ALMA has started science observing "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 nearly done. Branch imminent....
    • CASA 5.9/6.3: "Bug-fix" release ~June-ish?
    • 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:
    • Demo 'release' of prototype package in early April, including basic imaging, flagging, and self-cal (George) functions
    • FYI: CNGI Development instructions
  • Admin issues
    • 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's URSI GASS (J11) abstract accepted (Rome, 28 Aug - 4 Sep)
    • Mark gave short talk at EAVN VLBI meeting (Thailand, building 40m dish that will also be used for VLBI), 2021 Mar 5
    • RCI seminars: (Current series wrapped up 19 Feb, but slides/video for many talks are available.)
  • VLBI Integration Branch: CAS-13295
  • Other admin?
    • (George) Should casa-staff email list be expanded to include external groups (and thus shower them with all manner of daily trivia)? Or should there be a distinct email exploder expressly for important announcements relevant to the broader CASA contribution community?
    • Question from Bjorn: "Is fringefit still 'experimental' in CASA 6.2?"


  • 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) 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 5.9/6.3+6.4 prioritization underway
    • (Justin) Anything to report?
      • (George) Several of the more interesting VLBA-specific feature requests (resolved polarization calibrators, VLBA pulse-cal, VLA SysPower for Tsys, TEC) may indeed be hard to schedule this year.
      • (Mark) Likely to support pulse-cal effort with ingestion definition and mechanics based on recent similar work for Tsys, gaincurve. NB: required algorithmic development will likely borrow heavily from the existing fringefit implementation, including an ambiguity-resoloving step using a fringefit solve on a short scan
      • (George) Scan intent-setting likely a good project for Neal
  • Other maintenance/development JIRA
    • Nearly ready for validation/merge-to-master for 5.9/6.3 (waiting for 5.8/6.2 branching)
      • (Mark, CAS-13270) Handle NaNs in imported Tsys.
      • (Des, CAS-13224?) memory management improvements in fringefit
      • (Mark, CAS-8550) Pulsar-binned and single-IF import now not blocked by sys power support in exportuvfits; Need to coordinate casacore merge after 5.8/6.2 branching (pending CAS-11860?)
      • (Mark, CAS-13383) Mixed polarization basis conversion for EHT (via generic freq-dep fully-general Jones matrix (JJones), enabled within basic calibration framework, with caltable generated externally
    • Ongoing for 5.9/6.3+6.4
      • (George, CAS-12735; 12765,12553; 12954,10276) Frequency meta-info
      • (Mark, CAS-13287) AveragingTvi2 preavg opt-out for fringefit
      • (Mark, CAS-13266) Per-scan interpolation via overloading per-obs mechanism
      • (Des, CAS-13056) Overlapping solution intervals (initial implementation awaiting review by George)
    • Underway for 5.9/6.3+6.4
      • (Des, CAS-13361) Polarization combination for fringefit
      • (Mark, CAS-13003). EOP update (6.4?)
    • Other/Miscellaneous
      • CAS-12485: OTF weight munging for solve (Can we complete validation and deploy? Des seeking interested users at JIVE)
      • (George/Justin) to coordinate initial testing on CASR-463 (TEC) to better characterize basic requirements (also CAS-13040 re TEC retrieval changes)


  • (Mark/Des) Using external storage managers (DysCo) with CASA 6

Topic revision: r4 - 2021-03-31, GeorgeMoellenbrock
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