1st GTG Meeting Madrid February 8th, 2016

Local Arrangements/Opening Remarks (Colomer, Vicente)
GMVA Technical Group (GTG) constitution
- overview of the GMVA. Purpose/mission of the GMVA Technical Group (Alef)
- discuss and agree on GTG statutes, meeting cadence etc. (all GMVA)
- appoint the GTG chair
GMVA observations & operations
- Overview of observation preparation and operations e.g. pre-checks, DBBC2 news, FS news etc. (Bach)
- Overview support infrastructure,: FTP servers, web pages, mailing lists etc. (Rottmann)
- Discussion session (all)
  - standardization of operational procedure
  - fringe check procedure
  - DBBC2 PFB mode, PFB firmware version
  - FS schedule generation for PFB modes
  - log file contents
  - station session logs
  - additional topics
GMVA calibration
- Station reports on the current amplitude calibration strategy (every GMVA station 5-10 min)
- Discussion session (all)
  - necessary steps to improve the calibration quality
  - Tsys extraction in real-time
  - opacity issues
  - antab file generation
  - calibration quality control at the correlator
  - additional topics
ALMA and GMVA
- Overview of the current state, ALMA commissioning and GMVA-ALMA tests (Rottmann, Alef)
- Discussion session (all)
  - implications on GMVA operations
  - additional topics
AOB / closing remarks

Station Reports:

Onsala (Jun Yang)

Rottmann, de Vicente: take a look at Yb DBBC configuration (investigate amplitude drop)
- Done. Setup was verified to be correct. Observed problems were probably due to bug in the DBBC2 PFB control software.
All: Form small group to compile a pre-check list.
- Not done. Action item bumped to the updated list from the 2nd GTG meeting.
MPIFR correlator: GMVA correlation reports should be made available online.
- Done. Correlation progress can be viewed under: https://deki.mpifr-bonn.mpg.de/GMVA/GMVA_correlations
MPIfR correlator: Investigate possible PV phase jumps

Done. Phase jumps did not appear in the follow up session. Problems were possibly related to defective power supply in the PV DBBC2 which eventually failed in autumn 2016

	Size	Date	Attached by
amplitude_calibration_mro_jk.pdf No description	173.98 kB	10:29, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
evn-tog_madrid_30m.pdf No description	722.56 kB	10:29, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
gmva_overview_madrid16.pdf No description	423.38 kB	10:20, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
gmva_session_sept2015.pdf No description	654.26 kB	10:23, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
gmva_vlba_gbt.pdf No description	1010.12 kB	10:28, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
gmvaalma_madrid16.pdf No description	974.6 kB	10:26, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
kvn_ampcal_jung.pdf No description	728.86 kB	10:27, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
Minutes_Madrid.pdf No description	73.41 kB	11:07, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
rottmann_gmvatools.pdf No description	14.67 kB	10:23, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
TOG2016_1_DBBC.pdf No description	1873.3 kB	10:25, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete
vlbi_madrid_cal_pdb.pdf No description	2.01 MB	10:29, 20 May 2017	rottmann	Actions Attach new version Edit description Move/rename Delete

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