Meeting Information

  • 1600 UT (1000 MDT)
  • AOC 317; IP:; phone: +1 575-835-7370


News, Travel, Visitors (McMullin)

  • Overall status: B configuration (dipole installation 26 Apr (after this no L/S-band polarimetry)). Ongoing issues with operational stability of CBE - it continues to be the focus of testing. Correlator hw resources support up to 56 BlBprs (that many sub-bands or use for additional resolution). Update to RSRO recommendations.
    • All-hands meeting Wednesday: 1000-1100 MDT
  • Key dates:
    • 26 Apr: 4-band dipole installation
    • 02 May: RSRO Committee meeting
    • 07 May - 15 Jun: 4-band science observing
    • 09 May: Planned end of B configuration
    • 13-31 May: BnA configuration
  • Staff Travel:
  • Visitors:
    • 05 Jan - 06 Apr: John Cannon sabbatical at DSOC
    • 28 Feb - 28 Mar: Bob Sault

Hardware status and updates (Langley, Perley, Rupen)

Software status and updates (Butler)

Commissioning Group Reports and Test Planning

  • NOTE: Please cc me on submitted tests so that it can be assigned the appropriate priority!

Commissioning priorities for the week (McMullin, Chandler)

Double maintenance day week:
  • Mon
    • 1300-1700: Testing/software development time
    • 1800-0930: Science operations and testing
  • Tue: Maintenance day
    • %RED0930-1700: Testing/software development time
    • 1800-0630: Science operations and testing
  • Wed: Maintenance day
    • 0630-1700: Maintenance operations
    • 1800-0900: Science operations and testing
  • Thu, Fri (to be negotiated for additional observing time):
    • 0900-1700: Testing/software development time
    • 1800-0900: Science operations and testing
  • Sat-Sun
    • Science operations + planned testing

Issues Affecting Science Observing:

  • Correlator: Missing/lost scans in data sets. May be related to overall issues with CBE; major focus
  • Correlator: fshift sub-band anti-aliasing causing phantom spectral lines when using recirculation for narrow bands (only worry if Michael has to prep your file).
  • Correlator: time mislabeling in SDM data (non-synchronous operation between correlator dumps and CBE can require additional 1/2 integration time padding for online flags);Update from last week; no further work due to other CBE issues; will resume once this is solved.
  • Array/Construction: Frequency offset tests (Dhawan/Rupen). Update: The pattern suggests that crossing 32 MHz (one of the discontinuities in the L302 tuning plan) leads to the phase jumps. No explanation for the magnitude of the phase jump is offered here (~120 degrees).
  • Correlator: Delay rocking across bands. Implementation pending factor-of-2 reconciliation.
  • Array: Amplitude wobbles seen on subset of antennas; phase jumps at scan boundaries also seen on subset of antennas (Ka, Q bands only thus far).
  • Array: Zoo of other effects (some data are very good, some still seeing antenna-based IF/Polarization issue).

Testing This week

  • Correlator: Rupen: Subarray testing; CBE merge.
  • Planetary: Clark/Butler: Jupiter tracking test of new CALC libraries
  • Spectral line: Momjian: HI High resolution bandpass testing
  • Spectral line: Dhawan/Clark: Frequency offset phase jumps
  • Array: Individual issue sleuthing

Commissioning Groups

    • Adv: Low band (Owen):
      • Notes: Pick up starting 27 April with re-installation of dipoles
  • Calibrator Models
    • Notes: Ka/S-band SBs being analyzed.
  • HPC (Bhatnagar/Owen/Golap):
    • Notes:
  • Imaging (Ott/Golap):
    • Notes:
  • Algorithm (Bhatnagar, Owen):


RSRO B configuration status:

Individual reports (updates)

  • Brogan: (Q-band) Good data, little flagging
  • Chomiuk: (C-band) EA26 LL deformatter issue
  • Krauss: (CXKKa) sundry issues


Demo Science Status


Misc Actions

  • [McMullin]: Review/recover metrics for Priority 0 items.
  • [Perley/McMullin]: SPW/IF/BB lexicon and mapper
  • Development of WIDAR guidelines document (Michael)
  • List of known problems (can be used by OSRO commissioning team (van Moorsel)
      • Med Priority [TBD]: Added. Phase change when frequency changes (needs to be tested).
-- JosephMcMullin - 2011-03-28
Topic revision: r2 - 2011-03-29, JosephMcMullin
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