Meeting Information

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


News, Travel, Visitors (McMullin)

  • Overall status: C config; intense observing pressure in the 1200-2100 LST range; short week due to US Thanksgiving holiday (Thu-Fri) - we will suspend operations starting Wednesday evening and will resume observing early Friday morning (0000+ MST); Thursday will be used by the Canadian WIDAR group.

Commissioning priorities for the week (McMullin, Chandler)

Single maintenance day week:
  • Mon, Wed: For software development and testing (particularly on the WIDAR side)
  • Tue: Maintenance day
  • Thu: Down (correlator used for testing)
  • Fri-Weekend: Science observing (including demo); commissioning tests
  • Interrupt status for additional 3-bit testing; expected to be lab work only this week

Hardware status and updates (Langley, Perley, Rupen)

Software status and updates (Butler)

  • Links:
  • OPT 1.07 is on webtest undergoing testing (meeting today for anyone interested); planned update by 30 Nov. Problem in 1.06 with bulk edit of resource configurations; ongoing issues with performance.
  • CASA Update (new functionality available/issues/enhancements):Release continues to be immminent.
    • Concise list of deliverables for R3.2
  • AIPS Update (new functionality available/issues/enhancements): Eric is back;
  • SDM Update:
    • Added links to ASDM information off of home page:

Commissioning Reports

Observing recommendations update (Ops)

Post-processing: Kern: CASA 3.2 development expectations

Correlator: Krauss: Uniform noise across sub-bands (for wideband OSRO readiness)

Commissioning Group updates

Groups moving forward; historical associations of scientists with groups was not accurate; please review the groups and add your name as primary for those that you will be able to work on; we expect during this meeting to cover relevant details for all members.

In preparation

  • * Flagging*: Venkata: Autoflagging in CASA (Coming soon)
  • Polarization: Myers: Multi-band leakage/PA
  • Array: Dhawan/Rupen: RF switch tests with rapid monitoring; issue still affecting; being replaced as identified. Looking at acquiring new switches to solve the problem in the long term.

Commissioning Test Planning

  • High Frequency: Claussen: Weak calibrator tests (this week); needed.
  • Spectral Line: Momjian: Zeeman followup
  • Spectral Line: Dhawan: Follow-up on frequency offset phase jumps characterization.
  • Spectral Line: Ott: Doppler tracking sampling follow-up
  • Polarization: Antenna cross polarization (Perley; Need script.); LSCX on 3C147; Postponed until wideband X available on EA24.




Misc Actions

  • [Frail/Butler]: Enable restrictions based on proximity to sun; review OST weather trending.
  • [McMullin/Frail]: %REDWrite up disposition of RR items.
  • [McMullin]: Confirm restriction of RSRO scan length at 90 s
  • [Owen]: Outline issue with 90s scan length restriction.
  • [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 [Rupen]: X, Ku band subbands are inverted (IF 1 is labelled as IF4, IF2 as 3, IF3 as 2, IF 4 as 1). Noted that this had been tested but there were enough changes to warrant a re-do.
      • Med Priority [TBD]: Phase offsets within scans (phase jump at scan boundaries). R&L phase offset on some scans - probably L302 LO problem, needs tracking down. MR: Seen on EA07, EA25 (both RR and LL)
      • Med Priority [TBD]: Added. Phase change when frequency changes (needs to be tested).
      • Med Priority [TBD]: Anti-aliasing does not behave as advertised.
      • Low Priority [TBD]: First scan often bad.
      • Low Priority [TBD]: Phase (and amp) wobbles; long history.

-- JosephMcMullin - 2010-11-22
Topic attachments
I Attachment Action Size Date Who Comment
plot_trsr0030_flags.pngpng plot_trsr0030_flags.png manage 87 K 2010-11-23 - 01:32 JosephMcMullin Illustration of subreflector flagging issue.
Topic revision: r4 - 2010-11-23, JosephMcMullin
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