GTAC Observation Log

1. Date : 22/10/2019
2. Observation Sr. No. : 11517
3. Observer : Aditya Chowdhury, Nissim Kanekar, Jayaram Narayanan Chengalur
4. Observer's Email : chowdhury@ncra.tifr.res.in, nkanekar@ncra.tifr.res.in, chengalur@ncra.tifr.res.in
5. Project Name : %latex% The Atomic Hydrogen Content of Galaxies at $z \\\\approx 0.75-1.45$
6. Project Code : 37_063
7. Operator(s) : Deepak, Sachin, Shilpa
8. Command File : /odisk/gtac/cmd/chowdhury/deep2_31.cmd
9. LTA File : /gsbifrdata1/21oct/37_063_21oct2019_tgc_gsb.lta.1, /gsbifrdata1/21oct/37_063_21oct2019_tgc_gsb.lta, /gwbifrdata/21oct/37_063_21oct2019_gwb.lta.1, /gwbifrdata/21oct/37_063_21oct2019_gwb.lta
10. LogFlag File : /odisk/online1/logflags/37_063.FLAGS.2

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 : 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) : 591 591 540 540 51 51
30. Integration Time : 16.1061 Sec
31. No of Antennas Working(Fringing) at the beginning :24

32. Name of Non-Working Antennas (with reason for each) :
C01 : Servo problem
C04 : Mechanical maintenance.
E03 : 130 no fringe in GWB+GSB.
E04 : 130 no fringe in GWB.
W02 : No fringe.
C11 No fringe.
33. Note for Backup :

34. Start and End Time of Obs.(IST): 21 Oct 2019 20:00:00 - 22 Oct 2019 03:05:00

35. ONLINE Machine : TGC

36. No of Antennas Working(Fringing) at the end :25

37. RFI Status :

38. Comments (During Observations) :


------------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  	: 8192
GPU_CHAN_NUM  	: 0:8191:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: 1 1
GPU_RF4  	: 550  550
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: -1 -1
GCODE4  	: 37_016
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  	: 8
GPU_GAINEQ  	: OFF
GPU_TPA  	: From online tpa
GPU_BITS  	: 4 Bits
GPU_FILRFI  	: RFI Filterring OFF
GPU_BEAM_S  	: OFF
--------------------------------

------------GSB Setting---------
GSB_MODE 	: Realtime
GSB_LTA 	: 8
GSB_ACQ_BW 	: 33.333333
GSB_FINAL_BW 	: 0
GSB_EDGE_FRQ 	: 0
GSB_CHAN_MAX 	: 256
GSB_CHAN_NUM 	: 0:255:1
GSB_STOKES 	: Total_Intensity
GSB_CNTRL 	: ONLINE
GSB_FSTOP 	: ON
GSB_BEAM_1 	: OFF
GSB_BEAM_2 	: OFF
GSB_GAINEQ 	: ON
GSB_BB_LO 	: 149:156
GSB_HOSTS 	: gsbm1_shivneri
undefined 	: OFF
undefined 	: 306
--------------------------------

08:30 : Completed setup.
08:54 : Observed that GSB has fringes but GWB has phase ramps.
After debugging it is observed that GAB lo was 550 instead of 530.
Though we set it to 530 but remained at 550.

TGC was not getting source i.e. DEEP2_31 as source list was added properly.

This problem also took some time to solve. Finally at 21:35 started command file.

21:36 : Started command file.

23:40 : W02 started working.

02:50 : Stopped command file.

02:52 : Started scan on 3C48 for 10mins.
03:02 : Stopped scan and Observing session over.