VEGAS Team Meeting

Agenda:

1. Is OGP calibration implemented? Is ADC calibration in general complete?
2. Are stand-along ADC calibration routines ready to send to DIBAS. What about documentation to accompany them?
3. Mode 10-19 (ghost frequencies issue). Is Randy making any progress?
4. Blanking of “last switched integration” – is it implemented?
5. Observer documentation
6. Use of test time (including overnights)
7. Status of other “current issues”: https://safe.nrao.edu/wiki/bin/view/CICADA/CICADAGreenBankSpectrometerCurrentIssues

Meeting notes:

1. Is OGP calibration implemented? [No] Is ADC calibration in general complete? [No]
   • After MMC changes were promoted, continuum data taken in mode #1 looks stable - map looked good.
   • some warnings need to be investigated
   • Monitor the MMC part
   • OGP work remains
     • after the work is completed, possibly move rest frequency back to center of band?
     • Manager will look at stored values and reload for new observations
     • warning if memory vs. stored exceed a preset valus
2. Are stand-along ADC calibration routines ready to send to DIBAS. What about documentation to accompany them?
   • Developed Python code will be ok for both platforms, but not ready yet
   • Documentation is up to date with progress.
3. Mode 10-19 (ghost frequencies issue). Is Randy making any progress?
   • version 142 - still has issue
   • looking at two 'halves' of firmware and running simulations trying to reproduce problem - no success
   • Joe investigating ability to reproduce problem in just CPU with artificial packets - to be picked up after LO-1 work
   • Continue investigation
4. Blanking of “last switched integration” – is it implemented?
   • Issue with LO-1, scan coordinator drives VEGAS to a value that exceeds LO-1 period.
   • Last integration that exceeds scan length is blanked is a solution that has been coded, but needs testing and deployment.
5. Observer documentation
   • Upon investigation of existing documentation for a GBT Memo.
     • Proposer's guide data requires a lot of changes to make sure the baseline of information in proposals is sufficient to judge proposals
     • Amanda will take lead on edits
     • Observer's Guide will need similar updates as well
6. Use of test time (including overnights)
   • Tuesday (inc overnight)
   • Wednesday (inc. overnights)
     • Unit tests as needed by Paul (coordinated w/GBT Operator)
   • Thursday
7. Status of other “current issues”: https://safe.nrao.edu/wiki/bin/view/CICADA/CICADAGreenBankSpectrometerCurrentIssues

Other

1. Please make sure to properly code your timesheets for the current time period and going forward.
   • Software engineers should be using a GBT ops software CM&E account - Account 893252
   • Electronic engineers should be using a GBT ops electronics CM&E account - Account 432510
   • Commissioning activities should be getting charged to hardware support and testing - Account 432510
   • Scientists assisting with shared-risk commissioning should be charging an observer support account
     • 432540 for the most part. Accounts 142020 (GB-based staff) and 142010 (CV-based staff) for when you are helping with overarching observing support (not problem solving, VEGAS specific)