Minutes in BOLD

CASA/JIVE VLBI Coordination Meeting

2019 October 30 @ 1400UTC

Attendance: George, Justin, Mark, Des, Ilse


  • Future Meeting dates (usually last Wed of the month):
    • November: Mark unavailable, so defer to December; will follow-up by email in mid-November re status of ongoing work.
    • NEXT Meeting: 2019 Dec 11 @ 1400UTC
    • 2019 Jan 22? (one week early?)

General Admin

  • (Ryan at Pipeline Developers meeting in CV)
  • Recent/upcoming meetings:
    • CASA User Committee (Oct 3-4)
    • ADASS (Oct 6-10)
    • George at JIVE (Oct 11,14-16) See: Summary
    • Space VLBI 2020 in Charlottesville, VA (2020 Jan 28-30)
      • George (science time) likely going to present on astronomical delay screen calibration for OD errors (w/ Fomalont, based on prior work for VSOP-2 meeting in 2007)
      • JIVE probably sending Leonid Gurvits
  • CASA Newsletter (mid-Nov): contribution re EHT from Michael Janssen, via Ilse; coordinated by Bjorn
    • This is on track.
  • New CASA git repository. See: casa6
    • No more merges to traditional master ("casa") as of 2019 Oct 21 (exception: any patches to existing releases)
    • Ongoing work will have to be merged onto new branches in the new repository
  • Current VLBI Integration branch: CAS-12325
    • Will make new VLBI integration branch from new repository soon, modulo items that move out of CAS-12325 in current work
  • (Mark) Requirements collation ConsolidatedRequirements....Any news?
    • Mark finalizing this document, including acknowledgment of prior authors (Still in progress)
  • Work plan describing how/when CASA can replace AIPS (FY2020 NRAO/DMS Program Operating Plan)
  • Other admin?
    • Arpad "retiring" next month; Harro Verkouter to take over administrative role for VLBI collaboration with CASA.


  • Items for CASA 5.7/6.1 (Stakeholder inputs). (George to update these pages, determine disposition of VLBI Stakeholders items not otherwise accounted for)
    • NB: Feature freeze: 2019 Dec 15
    • (George, CAS-695) Support correlation-dependent flagging, with user option.
    • (George, CAS-12735) Frequency meta-info consolidiation (see also CAS-12553)
    • (Mark/George, CAS-12591) spwmap fix
    • (Des, CAS-12365,12653) Deploy dispersive term solve, including user term control
    • (George/Des, CAS-xxxxx) Convert CC tables to image or ComponentList for resolved model-setting
    • (Mark, CAS-8546) GAINCURVE definition, deployment of standardization (deployment --> 5.8/6.2)
    • (Des, CAS-12765) Wide bandwidth (deployment in CASA --> 5.8/6.2)
  • Items for future cycles (future stakeholders discussions should include these items, at least):
    • (George) Per-scan interpolation option?
    • (George) Overlapping solution intervals (CASR-467, CASR-468)?
    • (Mark) EOP. (Mark will discuss with Deller/Brisken next month in Austrailia)
    • (Des/George) PCAL (Des has ad hoc scripts, need updated prioritization from VLBA since this is not a high EVN priority)
    • (George) Polarization calibration w/ resolved calibrators
    • (Des) CAS-12485? fringefit weighting control (test data options pending)
    • (Des) Baseline stacking?
    • Opacity for high-frequency VLBI, derived from Tsys(sec(z))
      • Can use existing time-dep zenith opacity table
    • TEC
    • (Walter) Advanced VLBA Amplitude calibration a la Walker memo from a few years ago?
      • Bandpass normalization flexibility: voltage vs. power


  • Mark working on a MS concat bug in casacore: Merging MSs with overlapping antenna tables is incomplete when re-orienting baselines (phase conjugated, but cross-hands not swapped). Mark addressing this on casacore github; will make CAS ticket to promulgate the solution in CASA.


  • Recent VLBI-related helpdesk ticket
    • Single pol VLBI fix in fringefit not available in 5.6.0, so use a 5.7.0 tarball instead
    • Admin: Des and Mark need access to NRAO helpdesk so they can be assigned VLBI tickets and address them directly (only Ilse has access so far)

-- GeorgeMoellenbrock - 2019-10-30
Topic revision: r2 - 2019-10-30, GeorgeMoellenbrock
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding NRAO Public Wiki? Send feedback