Summary of the GMVA Session, Sep 24-26, 2015
  ============================================

Stations participating in c152a:
EB, PV, PdB, Ys, Mh

Stations participating in c152b:
EB, Ys, Mh, GB, 8xVLBA

A ftp-fringetest performed on BLLAC at the beginning of c152a
resulted in fringes to EB, PV, PdB, Ys, but not to Mh.
The weather was moderate in EB, PV, good at PdB and raining at Mh.

Observations are performed at 2 Gbps using the PFB mode. Metsahovi got a new
3mm receiver.

-----------------------------------------

Detailed notes:


Effelsberg:
The weather was variable, starting with thick clouds in c152a and better towards
the end of c152b. The were periods of lower cloud coverage in between. Tsys=180-300K, 
using RDBE backend.

24.9  21 UT thick clouds
25.9  01 UT improving, thin layers of clouds
25.9  10 UT thick clouds
25.9  19-21 UT focus was off by about 1 wavelength
26.9  00 UT clearing up
26.9  10 UT clear
26.9  19 UT clear, some scattered clouds
26.9  23 UT clear


PdB:
missed 1st scan, restart MK5A, recording done at 1 Gbps, using the old MK5 system (half bandwidth).
Plateau de Bure is observing under good conditions with 6 antennas.
Out reference antenna is on the N02 pad.
Observed only c152a, in good weather.

Pico Veleta:
observed only c152a. Recording done using DBBC backend and MK5B recorder.
Almost 20% of the scans lost due to the high elevation of the sources, see log (our software limit to observe is 83 deg).

Yebes:  did observe, recording with DBBC, weather was fine
        c152a: Tsys not during 17h00-20h30, due to problem with script
        problems with calibration system in c152b, hot load got stuck in the radiation path many 
        times and the operators had to release it manually. No Tsys after 269.13h00 until end.

Metsahovi: recording done using DBBC backend and MK5B recorder.

c152a and c152b:  
        It's partly cloudy at Metsähovi now. 
        25.9 7UT: The weather is improving, but the nights are very humid
        Pcal was switched on after scan no0077
        We missed 9 scans, no0272-no0287, due to jive5ab not switching from bank A to bank B automatically
        Pointing done after the session, and got good pointing results for several sources

GBT:   
        The project C152B has started at Green Bank. All is running normally.
        Skies are mostly clear. Tsys is 120-160K.
        But, alas, the prediction is for rain showers tomorrow.

        Conditions were good at Green Bank for about the first 9 hours,
        after which there were cloudy and rainy conditions.


VLBA:

did not observe c151a

For c152b:

VERY LONG BASELINE ARRAY OBSERVING LOG
--------------------------------------
Project:        C152B
Observer:       Krichbaum, T.
Project type:   OTHER
Obs filename:   c152bcrd.*
Date/Day:       2015SEP24/267
Ants Scheduled: NL FD LA PT KP OV BR MK GB 

=UT-Time===Comment===============================================MF#===%AD==AMD=
           Operator is Paul Padilla                                             
           UT1-UTC: 0.24, VClock: 0.034, GPS delta: -8.6                        
     2356  Begin at NL, FD, LA, PT, and KP                                      
     2357  Begin at OV and BR                                                   
     0000  Date is 2015SEP25/268.                                               
0224-0315 *PT removed for daily USNO run                         SCH    100   51
     0315  MK joins                                                             
     0544  New Operator: Karlee Radford                                         
     1335  Operator is A. Sowinski.                                             
     1357  FD wea: partially cloudy, light breeze, damp.                        
1728-1730 %PT DBE1 TimeStampSyncError. Cleared by itself.        TIME           
1909-1912 %OV Executor suddenly jumped to scan 1002, which                      
           shouldn't be run until 20:30. Restarted Executor.                    
     2130  New Operator: Paul Padilla                                           
     0000  Date is 2015SEP26/269.                                               
0439-0533 *PT,MK removed for daily USNO run                      SCH    200  108
     0545  New Operator: Karlee Radford                                         
     0753 %MK raining.                                                          
     0753 %BR raining.                                                          
     1336  Operator is A. Sowinski.                                             
1411-1414 %PT DBE1 TimeStampSyncError. Cleared by itself.        TIME           
1427-1429 *NL Autostow, power glitch. Repointed.                 COM    100    2
1822-1824 *MK Autostow, power glitch. Repointed.                 COM    100    2
1910-1918 *KP Autostow, power glitch. Repointed.                 COM    100    8
     2021  OV Windy.                                                            
     2357  End.                                                                 


Downtime Summary:
	Total downtime : 171 min
	Percentage downtime of observing: 0.7%
	Average downtime per hour : 0.4 min

    Total scheduled observing time (# Antennas): 23048 min (8)

Notes:
    * = Entries where data was affected.
    % = Entries where data may have been affected.
    & = Entries where the site tech was called out.
  WEA = Weather entries.
  MF# = Maintenance form or major downtime category associated with a problem.
  %AD = The percentage of an antenna affected by a problem.
  AMD = Total antenna-minutes downtime for a problem.
 Tsys = System Temperature (TP/SP x Tcal/2)
  ACU = Antenna Control Unit
  FRM = Focus/Rotation Mount
  RFI = Radio Frequency Interference
  VME = Site control computer
   CB = Circuit Breaker
 vclock = Program that compares site clock time to a standard.