GTAC Observation Log

1. Date : 14/01/2024
2. Observation Sr. No. : 16284
3. Observer : Nissim Kanekar, Aditya Chowdhury, Balpreet Kaur, Jayaram Narayanan Chengalur
4. Observer\'s Email : nkanekar@ncra.tifr.res.in, chowdhury@ncra.tifr.res.in, bkaur@ncra.tifr.res.in, chengalur@ncra.tifr.res.in
5. Project Name : %latex% An Ultra-Deep GMRT Band-4 HI 21cm Emission Survey of Galaxies in the COSMOS field
6. Project Code : 45_127
7. Operator(s) : Nilesh, Shriram
8. Command File : /data1/gtac/cmd/45_127/45_127_13Jan2024_2200_cmd.py
9. LTA File : /gwbifrdata/13jan/45_127_13jan2024_b4_gwb.lta
10. LogFlag File :  

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/TGC
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 : 4.0265 Sec
31. No of Antennas Working(Fringing) at the beginning :29

32. Name of Non-Working Antennas (with reason for each) :
C03 : GAB not set.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 13 Jan 2024 22:00:00 - 14 Jan 2024 07:00:00

35. ONLINE Machine : TGC

36. No of Antennas Working(Fringing) at the end :30

37. RFI Status :

38. Comments (During Observations) :

------------GWB Setting---------
GPU_MODE  	: Realtime
GPU_LTA  	: 4
GPU_ACQ_BW  	: 400.0000
GPU_FINAL_BW  	: 400
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 16384
GPU_CHAN_NUM  	: 0:16383:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: 1 1
GPU_RF4  	: 550  550
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: 1 1
GCODE4  	: 45_127
GPU_CNTRL  	: ONLINE/TGC
GPU_FSTOP  	: ON
GPU_BEAM_1  	: IA
GPU_BEAM_2  	: OFF
GPU_BEAM_3  	: OFF
GPU_BEAM_4  	: OFF
GPU_BM_INT  	: 16
GPU_GAINEQ  	: ON
GPU_TPA  	: From online/TGC tpa
GPU_BITS  	: 4 Bits
GPU_FILRFI  	: RFI Filtering OFF
GPU_BEAM_S  	: OFF
GPU_PFB  	: OFF
GPU_PFB_TAPS  	: 4
GPU_BEAM_BIT  	: 16
GPU_VLT_BIT  	: 8
GPU_WALSH  	: OFF
GPU_ENV  	: RELEASED
--------------------------------
22:00 : Started settings.
22:20 : Started command file,
        \'/data1/gtac/cmd/45_127/45_127_13Jan2024_2200_cmd.py\'

23:05 : Stopped command file due to scintillations observed on flux cal and phase cal scans.

23:15 : Started scan on 3C147 to monitor scintillation.

23:20 : C03 started working.
23:35 : Scintillation looks improved on 3C147, restarted command file.

23:36:04 : Started scan on 3C147 for ~ 10.3795 min.
23:51:43 : Started scan on 0943-083 for ~ 5.01079 min.
23:58:21 : Started scan on COSMOS1 for ~ 9.1268 min.

00:06 : Phase cal shows scintillation pattern, stopped command file and restarted scan on phase cal.

01:12 : Phase cal still shows scintillation patterns.

01:17:46 : Started scan on 3C286 for ~ 9.66367 min.
01:31:52 : Started scan on 0943-083 for ~ 5.01079 min.

01:37 : Scintillation looks disappeared. re-started command file.
07:00 : Command file stopped and observation session over.