Overall status: In A configuration (ending 12 Sep); Correlator hardware (62 BlB pairs) available. Double maintenance day with power cyclings/fire suppression testing (=disruptive); unlikely sci-ops until Thursday.
Key dates:
08 Jun - 12 Sep: A configuration (move from 31 May - 08 Jun).
Staff Travel:
FO: 12 Aug - 12 Sep
RP: 10 Sep - 16 Sep (Brazil)
URSI (Perley)
Visitors:
Michiel Brentjens: 11 Jun - 11 Nov (Holography; characterizing polarized beams)
Dave Roberts: 10 Aug - 20 Aug (SS433 Demo science)
Hardware status and updates (Langley, Perley, Rupen)
Array (Perley/Langley):
Antennas: EA25 out; EA23 on MP; back to array 1 Sep. Problems over the weekend with EA27 (subreflector); EA11 power;
Receivers: EA23; EA24 for first L-band solar capable Rx.
Calibration (Perley): Gain compression/expansion ongoing (Hayward).
Brentjens: More testing this week.
WIDAR (Rupen):
Notes (Rupen/Sowinski): Some issues with BlB prs over the weekend suspiciously related to power glitches. Work on 3-bit sampler auto-gain setting this week.
Review of last week's items: 13-17 Aug: 1E37 amps (CBE bad initialization of no data); 15-16 Aug: high frequency problems (bad pointing script); problem interframe delay (improved transition testing); malformed subset of BDFs (no clear; test in place - no recurrence).
Computing (Robnett):
Notes: Issues with lustre filling - please move/remove data as possible; a new lustre node is in and likely to be installed this week.
NOTE: Please cc me on submitted tests so that it can be assigned the appropriate priority!
Commissioning priorities for the week (McMullin, Chandler)
Configuration move week (work around these activities:
Mon
1000-1700: Testing/software development time
1800-0900: Science operations and testing
Tue: Maintenance day
0630-1700: Maintenance operations
1800-0900: Science operations and testing
Wed: Maintenance day
0630-1700: Maintenance operations
1800-0900: Science operations and testing
Thu:
0900-1700: Testing/software development time
1800-0900: Science operations and testing
Fri (not-yet-a-holiday):
0900-1700: Testing/software development time
1800-0900: Science operations and testing
Sat-Sun
Science operations + planned testing
Issues Affecting Science Observing:
Correlator: [Rupen/Carlson w/ Momjian/Sault] V stokes issues.Identified possible issues in the noise related to the 3-level phase rotator. Water maser data taken. Write-up underway to be shared with Brent; further planning pending
Correlator: [Pokorny/Rupen/McMullin] time mislabeling in SDM data (non-synchronous operation between correlator dumps and CBE can require additional 1/2 integration time padding for online flags). .Needs close-out testing (Michael); confirmation of visibility/flags (Joe).
Correlator: [Clark/Carlson] Delay rocking across bands. Ongoing discussion of implementation; pending Bryan's return
Array: [All] Zoo of other effects (some data are very good, some still seeing antenna-based IF/Polarization issue).
Array: Hunter: OPT testing revealed some oddities with North Arm antennas (status)?
Array: Chandler: Stepped (asymptotic) gain changes on some antenna IFs (status)?
Array: Hughes: Rapid phase changes at L band
Array: EA28 many zeros
Array: EA24 A/C (- bad L301-1 (wouldn't lock)-being replaced today).
Array: EA27 L305 instability; being looked at today.
Testing This week/soon
[Sowinski et al]; Executor update testing
Phased array testing as possible
Planetary tracking tests
Holography scanning tests
3-bit sampler testing; automatic gain setting.
astrometry mode testing.
MCAF update testing.
[Goss et al]; Sub-band edge effects testing.
[Owen]: L band deep field study
Subarrays: cleanup.
Stage 2 mixer testing to relax sub 128 MHz BW grids
Correlator: Rupen: S-band shadow testing
Spectral line: Roy/Dhawan: HI High resolution bandpass testing
Notes: Initial UVW tests: I wanted to confirm that CASA and AIPS are close (~few parts in 10^6). In fact, they are not. UVFIX run on data imported from CASA makes a change of almost 10^-4.
Calibrator Models
Notes: Reduction underway.
HPC (Bhatnagar/Owen/Golap):
Notes: ~500 GB data set obtained.
Imaging (Ott/Golap):
Notes: Takahashi/Ott working on mosaic needs in PST/OPT. Document under review.
Algorithm (Bhatnagar, Owen):
Notes: Calibration discussion this week (Moellenbrock)