VEGAS Team Meeting
Attendees: Amanda, Joe, Marty, Richard, Mark, Randy, Dan, John, Hong, Toney
Agenda:
- Rebuild of BOFs for specific frequencies; associated updates to vegas.configurations
- Mode 10--13,15--18 Testing
- VEGAS Data Display
- Mode 10-19 (ghost frequencies issue)
- Blanking of last switched integration
- Status of Manager writes to many sub-bands in 8 subband mode problem (release and test)
- Content of August 'release'
- Blanking times
- ADC calibration routines and documentation for DIBAS
- Use of test time (including overnights)
- Status of other current issues: https://safe.nrao.edu/wiki/bin/view/CICADA/CICADAGreenBankSpectrometerCurrentIssues
Meeting notes:
- Rebuild of BOFs for specific frequencies; associated updates to Vegas configurations
- If we build bofs for correct sample frequency then ADC issues (MMCM failures) should be resolved
- In process - could test tomorrow
- Hong will build (4.5 hrs per)
- John will send needed clock frequencies with priorities
- Changes to yellow block - a new library should be used - Hong will circulate library to be used for subsequent compiles.
- has most recent ADC developments
- Should be an easy build
- Mode 10--13,15--18 Testing
- VEGAS Data Display
- Gathering science input in meeting this week to inform work by Joe Masters
- Add Jay. Maybe Sam, & Adam
- Mode 10-19 (ghost frequencies issue)
- We have a workaround for the problems for modes 10-13 and 15-18
- 14 and 19 modes are only one ones left to be fixed Once they are fixed the workaround above will be replaced
- L1 and L8 problems identified by Randy
- data ordering problem in L1.
- works in simulation - compiled versions don't work (no data output)
- Blanking of last switched integration
- Status of Manager writes to many sub-bands in 8 subband mode problem (release and test)
- Content of August 'release' for next semester observing
- Currently: everything except Mode 14 & 19 based upon future testing
- Blanking times
- Need to set up maximum for switching times to optimize observational efficiencies
- Noise diode
- currently 2ms for noise diode
- use values from 'Joe's document' for published value
- LO - to be validated/updated by Joe
- Frequency switching w/o doppler tracking should be 8ms (update MR 2Q32014)
- Frequency switching w/doppler tracking should be 80ms (update MR 2Q32014)
- ADC calibration routines and documentation for DIBAS
- Could be cleared by #1 above
- Use of test time (including overnights)
There is a possibility of a moving telescope Wednesday night and Thursday daytime to be confirmed.
-
- Unscheduled request(s)
- Tuesday 08:00 - 13:30
- Wednesday All day
- 12:00 - 16:00 - bof testing [Prestage]
- Wednesday eve. - on-sky testing - mixed mode testing needs minimum of 10 minutes data per permutation [Prestage]
- Thursday All day [pending]
- 08:00 - 12:00 - servo tests [Prestage]
- Monday overnight
- Status of other current issues: https://safe.nrao.edu/wiki/bin/view/CICADA/CICADAGreenBankSpectrometerCurrentIssues
Other
- 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)
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MartyBloss - 2014-07-01