Meetings/20090909

Catchup after a month of no meetings

Agenda

State of code changes

What state is firmware at, etc.

Next steps

What we are going to do next

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Minutes

• discussion of bandpass variability
  • Emil showed some 6cm and 3cm data. Little evidence for variation of amplitude across the band at 6cm. Some at 3cm but the source may be partially resolved. More to do on firming up these results.
  • some other anecdotes about variability like this, from Emonts, and Westmeier, during early CABB commissioning.
• zoom bands
  • plan is still to provide 1 band, of 1MHz width, by mid-Sept.
  • There are plans for 4, 16 and 64Mhz after that, delivery of each taking about 4 months. Wider bandwidths are more complex.
• lots of ticket closures!: #44, #59, #67, #74, #78, #79, #85, #90
  • the time-variable bandpass table code is done, Bjorn Emonts is testing (and pretty happy)
• discussed state of:
  • #24 close
  • #47 may affect polarization imaging experiments, eg Massardi/Ekers? work on Planck sources
  • #80 confirmed, can be worked around so low priority
• MarkC explained about changes he's made to allow building with gfortran
  • moved Linux build to 'phoenix' - needed for recent enough compiler
  • moved Solaris build to 'cetus', after 'attila' was unceremoniously deactivated.
  • this work also allows dealing with the large array problems that ptrDiff was developed to address.
• Emil described his work on reimplementing pyflag in C. It's much faster now but uses the same algorithm. Needs a better way to characterise the noise so the software can select things that are 'abnormal'. Needs to be built on other platforms and given a test drive.
• Future plans
• Next meeting 2009-09-16, same time slot.

Actions

• Emil - a bit more work on visualising bandpass changes
• Graeme to send us notes on zoom band plans from CABB meetings
• Vince to chase down data sets reported as showing b/p variability
• MarkW to review tickets for more closeable ones
• Jamie to add some tickets relating to flagging problems reported to him

Participants

• MarkC
• Jamie
• MarkW
• Emil
• Graeme
• Vince

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