Overall status: B configuration (dipole installation 26 Apr (after this no L/S-band polarimetry)). CBE issues resolved! Correlator hw resources support up to 56 BlBprs (that many sub-bands or use for additional resolution). Issues over the weekend (power glitches, wind stowages, CPCC2 went down, deformatter misalignments for a few few hours on ea01-b, ea21-a, ea21-c.
Hardware status and updates (Langley, Perley, Rupen)
Array (Perley/Langley):
11Apr: EA13 returns to array; EA05 to MP; EA18 to Barn.
Gain compression/expansion under investigation (for strong sources; Perley)
Adding/removing antennas from the array during observations (Clark/McMullin)
WIDAR (Rupen):
Notes (Rupen/Sowinski): CBE issues have stabilized; can begin to pick up other testing threads (dtEpoch, subarrays). Begin testing 64 boards this week. 3-bit testing will continue.
Ongoing work with alerts (will lead to improved flagging); rolling forward and back on CBE as needed. OPT 1.09 coming at the end of the month (see AOB).
CASA Update (new functionality available/issues/enhancements):Notes (Miriam):
AIPS Update (new functionality available/issues/enhancements): Notes (Eric):
NOTE: Please cc me on submitted tests so that it can be assigned the appropriate priority!
Commissioning priorities for the week (McMullin, Chandler)
Single maintenance day week:
Mon
All day observing with commissioning tests/science observing
Tue:
0900-1700 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: time mislabeling in SDM data (non-synchronous operation between correlator dumps and CBE can require additional 1/2 integration time padding for online flags);Look at again next week.
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).