GTAC Observation Log

1. Date : 27/04/2015
2. Observation Sr. No. : 7744
3. Observer : Ue Li Pen, Robert Main,Marten H vanKerkwijk, John Antoniadis ,Keith Vanderlinde ,Yashwant Gupta ,Maxim Lyutikov ,Jean-Pierre Macquart ,Franz Kirsten 


4. Observer's Email : pen@cita.utoronto.ca, main@astro.utoronto.ca, mhvk@astro.utoronto.ca, robamain1@gmail.com, ygupta@ncra.tifr.res.in
5. Project Name : Separating the Sources of the Robert Main Crab\'s Enigmatic Radio Emission \r\n
6. Project Code : 28_055
7. Operator(s) : Shilpa
8. Command File : /odisk/gtac/cmd
9. LTA File : /gsbifrdata/27apr/28_055_27apr2015.lta
10. LogFlag File : /odisk/online1/logflags/28_055.FLAGS

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 602 MHz ,RF2 : 602 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540MHz , IVLO1 : 62 MHz, IVLO2 : 62 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 16 MHz,ON, IF-CH2 : 4+14 dB, 16 MHz,ON

GSB SETTINGS :

14. GSB Host : gsbm1
15. GSB Mode : Realtime
16. GSB LTA : 8
17. GSB CTRL : ONLINE
18. GSB Fstop : ON
19. GAIN EQ : ON
20. Stokes : Total_Intensity
21. Beam - 1 : OFF
22. Beam - 2 : OFF
23. ACQ BW : 16.666666 MHz
24. Final BW : 16.666666 MHz; Step # 
25. Maximum Channels : 256
26. Channel Numbers : 0:255:1
27. LO5 -1  : 138
28. LO5 -2  : 167

29. Frequency Parameters (TPA) : 602 602 540 540 62 62
30. Integration Time : 16.1061 Sec
31. No of Antennas Working(Fringing) at the beginning :28

32. Name of Non-Working Antennas (with reason for each) :
S03 : 175pol Strong RFI lines.
W03 : PC104 installation.
33. Note for Backup :

34. Start and End Time of Obs.(IST): 27 Apr 2015 18:00:00 - 27 Apr 2015 21:04:00

35. ONLINE Machine : Shivneri

36. No of Antennas Working(Fringing) at the end :28

37. Comments (During Observations) :
18:00 : Started settings.
18:20 : Settings done.
19:00 : Recorded data on B0531+21 for 5min, but it shows buffer loss.
19:30 : Due to buffer loss, rebooted all node and rebooted the switches.
20:00 : Recording again gives an error 

8 -- (SHM) buffers lost for RANK 0 for ITR 2045
CURREC = 8046 SHM_CUR_REC = 8051 CURBLOCK = 6 COUNT = 2045
#WRITE 0 2045                                    34 ms
#WRITE 0 2045                                    42 ms
$DEMUX 0 2045   57 ms
#WRITE 0 2045                                    500 ms
#WRITE 0 2045                                   753 ms
CURREC = 8047 SHM_CUR_REC = 8054 CURBLOCK = 7 COUNT = 2046
#WRITE 0 2046                                    41 ms
#WRITE 0 2046                                    42 ms
$DEMUX 0 2046   58 ms
#WRITE 0 2046                                    479 ms
#WRITE 0 2046                                   761 ms
8 -- (SHM) buffers lost for RANK 0 for ITR 2047
CURREC = 8056 SHM_CUR_REC = 8057 CURBLOCK = 0 COUNT = 2047
#WRITE 0 2047                                    67 ms
#WRITE 0 2047                                    70 ms
$DEMUX 0 2047   59 ms
#WRITE 0 2047                                    413 ms
#WRITE 0 2047                                   825 ms

20:22 : Restarted recording on B0531+21.
20:54 : At the end again it gives buffer loss.
20:56 : Restarted recording on B0531+21.
21:04 : Stopped recording and observing session over.