GTAC Observation Log

1. Date : 27/08/2019
2. Observation Sr. No. : 11375
3. Observer : Chandreyee Maitra, Subhashis Roy, Fabio Acero
4. Observer's Email : chandreyeee@gmail.com, roy@ncra.tifr.res.in, fabio.acero@cea.fr
5. Project Name :  First radio imaging and polarization measurement of the nebula of the middle aged pulsar PSR J1831-0952
6. Project Code : 36_072
7. Operator(s) : Nilesh
8. Command File : /odisk/gtac/cmd/roy/u36_072.27aug19.cmd
9. LTA File : /gwbifrdata2/27aug/36_072_27aug2019_gwb.lta
10. LogFlag File : /odisk/online1/logflags/PNTG.FLAGS.3295, /odisk/online1/logflags/36_072.FLAGS

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1454 MHz ,RF2 : 1454 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1505 MHz, ILO2 : 1505MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 32 MHz,ON, IF-CH2 : 4+14 dB, 32 MHz,ON

GSB SETTINGS :

14. GSB Host : gsbm1_shivneri
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 : 33.333333 MHz
24. Final BW : 0 MHz; Step # 0
25. Maximum Channels : 256
26. Channel Numbers : 0:255:1
27. LO5 -1  : 149
28. LO5 -2  : 156

29. Frequency Parameters (TPA) : 1454 1454 1505 1505 51 51
30. Integration Time : 8.053 Sec
31. No of Antennas Working(Fringing) at the beginning :21

32. Name of Non-Working Antennas (with reason for each) :
C00 : GAB time out.
C03 : FPS problem.
C10 : CH-2 very low fringe.
C14 : FPS problem.
S02 : FPS problem/large offsets.
E04 : Fibre cut.
E05 : Fibre cut.
E06 : Fibre cut.
W03 : Intermittent fringe loss.
33. Note for Backup :

34. Start and End Time of Obs.(IST): 27 Aug 2019 17:00:00 - 27 Aug 2019 23:05:00

35. ONLINE Machine : Shivneri

36. No of Antennas Working(Fringing) at the end :23

37. RFI Status :Very strong satellite RFI at ~ 1170 MHz during observing run, it was at its peak around 17:38 IST while observing 3C286. 



38. Comments (During Observations) :
17:00 : Started settings.

------------GWB Setting---------
GPU_MODE  	: Realtime
GPU_LTA  	: 4
GPU_ACQ_BW  	: 400.0000
GPU_FINAL_BW  	: 400.0000
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 2048
GPU_CHAN_NUM  	: 0:2047:1
GPU_STOKES  	: Full_Stokes
GPU_SIDEBAND  	: 1 1
GPU_RF4  	: 1470  1470
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: 1 1
GCODE4  	: 36_072
GPU_CNTRL  	: ONLINE
GPU_FSTOP  	: ON
GPU_BEAM_1  	: OFF
GPU_BEAM_2  	: OFF
GPU_BEAM_3  	: OFF
GPU_BEAM_4  	: OFF
GPU_BM_INT  	: 4
GPU_GAINEQ  	: ON
GPU_TPA  	: From GWB GUI.
GPU_BITS  	: 4 Bits
GPU_FILRFI  	: RFI Filterring OFF
GPU_BEAM_S  	: OFF
--------------------------------

17:27:49 : Started scan on 1609+266 for ~ 6.08453 min.
17:38:35 : Started scan on 3C286 for ~ 6.08453 min.

17:40 : C14 started working.

17:50:00 : Started command file.
          /odisk/gtac/cmd/roy/u36_072.27aug19.cmd

19:30 : C03 started working.

22:43 : Stopped command file, and started scan on 1822-096 for ~ 4 min.
22:50 : Started scan on 2136+006 for ~ 4 min.
23:00 : Started scan on 3C48 for ~ 5 min.
23:05 : Stopped scan and observation closed.