GTAC Observation Log

1. Date : 25/08/2020
2. Observation Sr. No. : 12345
3. Observer : Poonam Chandra, Ayan Biswas, Barnali Das
4. Observer\'s Email : poonam@ncra.tifr.res.in, ayan.scc2@gmail.com, barnali@ncra.tifr.res.in
5. Project Name : Uncovering the intriguing nature of the double O-O binary system Plaskett`s star
6. Project Code : 38_102
7. Operator(s) : Shriram, Surender
8. Command File : /odisk/gtac/cmd/poonam/obs_25aug.cmd
9. LTA File : /gsbifrdata1/25aug/38_102B_25aug2020_gsb.lta, /gsbifrdata1/25aug/38_102A_25aug2020_gsb.lta, /gwbifrdata1/25aug/38_102A_25aug2020_gwb.lta, /gwbifrdata2/25aug/38_102B_25aug2020_gwb.lta
10. LogFlag File : /odisk/online1/logflags/PNTG.FLAGS.3658, /odisk/online1/logflags/38_102B.FLAGS.5, /odisk/online1/logflags/38_102A.FLAGS.5

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 591 MHz ,RF2 : 591 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540MHz , 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 : Full_Stokes
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) : 591 591 540 540 51 51
30. Integration Time : 4.0265 Sec
31. No of Antennas Working(Fringing) at the beginning :26

32. Name of Non-Working Antennas (with reason for each) :
C03 : : Mechanical Work
W05 : : Servo Problem.
E04 : : Low fringe in GSB.
E06 : : Low fringe in GSB.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 25 Aug 2020 07:00:00 - 25 Aug 2020 12:00:00

35. ONLINE Machine : Shivneri

36. No of Antennas Working(Fringing) at the end :26

37. RFI Status :

38. Comments (During Observations) :
Note : Buffer loss observed through-out the observation in GSB only (ref cs no 2020.1045).
------------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_RF3  	: 550  550
GPU_DDCLO3  	: 0.0000  0.0000
GPU_SB3  	: -1 -1
GCODE3  	: 38_102B
GPU_RF4  	: 1460  1460
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: 1 1
GCODE4  	: 38_102A
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  	: 16
GPU_GAINEQ  	: OFF
GPU_TPA  	: From GWB GUI.
GPU_BITS  	: 4 Bits
GPU_FILRFI  	: RFI Filterring OFF
GPU_BEAM_S  	: OFF
--------------------------------
07:00 : Started set-up for Multi subarray. 
07:20 : GSB Full stokes mode not working due to node37 problem.
07:20 - 07:35 : Node37 rebooted and it started working(cs no 2020.1044) .
--------------------------------
07:40 : Started GSB but observed buffer loss so rebooted GSBM1
(cs no 2020.1045)
07:55 : Restarted GSB and GWB but buffer loss persist.
---------------------------------
08:06 : Started scan on 3C147 for ~ 8.76888 min.
08:19 : Started command file.
        /odisk/gtac/cmd/poonam/obs_25aug.cmd
11:47 : Stopped command file.
11:51 : Started scan on 3C147.
12:00 : Stopped scan and observing session over.
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