User Tools

Site Tools


lbaops:lbafeb2011:vt13dgmlog

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

lbaops:lbafeb2011:vt13dgmlog [2015/12/18 16:38] (current)
Line 1: Line 1:
 +
 +                   Observing Log for VLBI test of 18 Feb 2011
 +                   ------------------------------------------
 +
 +Participating telescopes : GMRT + ATCA + Mopra 
 +
 +Configuration at start of expt :
 +RF band = 1390,   LO-I = 1330,   LO-IV = 60,   LO-V = 140 (& 165),   IF BW = 16
 +
 +08:10 : test on 3c286 : Fringes seen on all working antennas in GHB & GSB
 +
 +Antennas selected for VLBI experiment : C00, C01, C02, C05, C06, C08
 +(note : C05, C06, C08 connected to BB monitor port o/p (both pols)
 +
 +Ready to start actual run !
 +
 +Trying test run : disk write error!  disks are not mounted on any of the 16 nodes!!  Mounted the disks and checked data recording and time-stamp : look OK.
 +
 +Set the number of blocks in the recording program to 3600 (~ 15 mins)
 +
 +All antennas on source J2253+1608 (aka 2253+161 in VLA calibrator catalog)
 +
 +Expt #1 :
 +  Rb-II ;  GPS ON ;  start at :  2011 02 18 09 06 00 ; stop at : 09 21 00
 +  raw_voltage1.vlbi_18feb_1.node0.scan0
 +
 +Switched to Rb-I using GPS-II for disciplining; reset LO-V
 +
 +Expt #2 : 
 +  Rb-I  ;  GPS ON ;  start at :  2011 02 18 09 33 00 ; stop at : 09 48 00
 +  raw_voltage1.vlbi_18feb_2.node0.scan0
 +
 +switched to Rb-III using GPS-II for disciplining; reset LO-V
 +
 +Expt #3 :
 +  Rb-II ; GPS OFF ; start at : 2011 02 18 10 33 00 ; stop at : 10 43 00 
 +  raw_voltage1.vlbi_18feb_3.node0.scan0 
 +
 +switched back to Rb-III with GPS-II connected disciplining; reset LO-V
 +
 +Expt #4 : 
 +  Rb-III;  GPS ON ; start at : 2011 02 18 10 49 00 ; stop at : 10 59 00
 +  raw_voltage1.vlbi_18feb_4.node0.scan0 
 +
 +switched to Rb-I with GPS disconnected; reset LO-V
 +
 +Expt #5 :
 +  Rb-I  ; GPS OFF ; start at : 2011 02 18 11 03 00 ; stop at : 11 13 00 
 +  raw_voltage1.vlbi_18feb_5.node0.scan0 
 +
 +switched to Rb-III with GPS disconnected; reset LO-V
 +
 +Expt #6 :
 +  Rb-III; GPS OFF ; start at : 2011 02 18 11 19 00 ; stop at : 11 29 00
 +  raw_voltage1.vlbi_18feb_6.node0.scan0 
 +
 +switched to Rb-I with GPS-I connected to it; reset LO-V
 +
 +Expt #7 : 
 +  Rb-I  ; GPS ON  ; start at : 2011 02 18 11 32 00 ; stop at : 11 42 00
 +  raw_voltage1.vlbi_18feb_7.node0.scan0 
 +
 +Changed RF, LO to new setting :
 +RF band = 1390,   LO-I = 1325,   LO-IV = 65,   LO-V = 135 (& 170),   IF BW = 6
 +
 +Checked with real-time mode of GSB and verified fringes OK on J2253+1608;  
 +restarted raw dump mode, did power equalise and recorded data :
 +
 +Expt #8 : 
 +  Rb-II ; GPS ON  ; start at : 2011 02 18 12 09 00 ; stop at : 12 18 00
 +  raw_voltage1.vlbi_18feb_8.node0.scan0 
 +
 +Restored RF, LO back to first setting; verified fringes OK with real-time mode 
 +of GSB;  switched back to raw dump mode, including fresh power equalise, and ran the following : 
 +
 +Rb-II & GPS ON ;  LO-I = 1330,   LO-IV = 60,   LO-V = 140 (& 165),   IF BW = 16.
 +
 +Expt #9  (switching between different sources):
 +J2358-1020  (aka 2358-103) ;  ON src at : 12:31:00 ;  OFF src at : 12:34:15
 +J2358+1955  (aks 2358+199) ;  ON src at : 12:36:15 ;  OFF src at : 12:39:10
 +J2253+1608  (aka 2253+161) ;  ON src at : 12:40:25 ;  OFF src at : 12:44:05
 +J2358-1020  (aka 2358-103) ;  ON src at : 12:46:05 ;  OFF src at : 12:49:05
 +J2358+1955  (aks 2358+199) ;  ON src at : 12:51:15 ;  OFF src at : 12:54:00
 +
 +file name : raw_voltage1.vlbi_18feb_9.node0.scan0   (from 12 31 00 to 13 01 00)
 +
 +Expt #10 : 
 +J2358-1020  (aka 2358-103) ;  ON src at : 12:56:30 ;  OFF src at : 12:59:10
 +J2358+1955  (aks 2358+199) ;  ON src at : 13:01:40 ;  OFF src at : 13:04:00
 +J2358-1020  (aka 2358-103) ;  ON src at : 13:06:33 ;  OFF src at : 13:09:05
 +J2358+1955  (aks 2358+199) ;  ON src at : 13:11:30 ;  OFF src at : 13:14:05
 +
 +file name : raw_voltage1.vlbi_18feb_10.node0.scan0   (from 12 55 00 to 13 25 00)
 +
 +Getting difficult to slew between the sources as they are coming close to transit...   discussed with Chris Phillips and agreed to stop this and just do
 +a long track for the rest of the time available
 +
 +Expt #11 :
 +Long track on J2358-1020 for 30 mins :
 +
 +file name : raw_voltage1.vlbi_18feb_11.node0.scan0   (from 13 20 00 to 13 50 00)
 +
 +End of test run.
 +
 +================================================================================
 +
  
lbaops/lbafeb2011/vt13dgmlog.txt · Last modified: 2015/12/18 16:38 (external edit)