Meeting Information

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


News, Travel, Visitors (McMullin)

Commissioning priorities for the week (McMullin, Chandler)

Single maintenance day week:
  • Early week testing (Correlator software/subreflector tests/Ku SEFD/etc)
  • Science (includes Thursday and likely Friday; enables additional observing during high pressure gal center).
  • Other commissioning tests
  • Interrupt status for additional 3-bit testing

Hardware status and updates (Langley, Perley, Rupen)

Software status and updates (Butler)

Observing recommendations update (Ops)

Commissioning Reports

High Frequency: Subreflector rotation tests: K, Ka, Q (Perley/Sowinski)

Group reports

  • Polarization (McMullin for Myers)
  • Scheduling (Wrobel/Clark)

In preparation

  • * Flagging*: Venkata: Autoflagging in CASA (Next week)
  • Calibration: Marvil: Gain curve polynomial fitting (Next week)
  • Polarization: Multi-band leakage/PA (Myers, Marvil): Not a priority but still needed; keep on list.
  • Correlator: Krauss/Hunter: 7 vs 8 node observing (follow-up; pending RSRO results)
  • Array: Dhawan/Rupen: RF switch tests with rapid monitoring

Commissioning Test Planning

  • Spectral Line: Momjian: Zeeman suite of tests.
  • Correlator: CBE averaging with restricted nodes
  • Polarization: Antenna cross polarization (Perley; Need script.); LSCX on 3C147; Scheduled for double maintenance day this week. Postponed until wideband X available on EA24
  • Spectral Line: Dhawan: Follow-up on frequency offset phase jumps characterization.
  • Spectral Line: Ott: Doppler tracking sampling follow-up


  • Review Overall status; missing SBs

Other updates:


Demo Science (Chandler/Condon): Project Codes: *TDEM*

Commissioning Group updates


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 - 2010-11-08
Topic revision: r2 - 2010-11-09, JosephMcMullin
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