GTAC Observation Log

1. Date : 24/02/2024
2. Observation Sr. No. : 16420
3. Observer : Balpreet Kaur, Nissim Kanekar, Aditya Chowdhury, Jayaram Narayanan Chengalur
4. Observer\'s Email : bkaur@ncra.tifr.res.in, nkanekar@ncra.tifr.res.in, chowdhury@ncra.tifr.res.in, chengalur@ncra.tifr.res.in
5. Project Name : Confirming the detections of HI 21cm absorption towards radio-loud AGNs in the COSMOS field
6. Project Code : 45_131
7. Operator(s) : Navnath, Nilesh, Pramod, Sachin, Shilpa
8. Command File : /data1/gtac/cmd/45_131/45_131_23Feb2024_2000_cmd.py,, /data1/gtac/cmd/45_131/45_131_23Feb2024_2300_cmd.py
9. LTA File : /gsbifrdata/23feb/45_131_23feb2024_b4_gsb.lta.2, /gsbifrdata/23feb/45_131_23feb2024_b4_gsb.lta.1, /gsbifrdata/23feb/45_131_23feb2024_b4_gsb.lta, /gwbifrdata/23feb/45_131_23feb2024_b4_gwb.lta.2, /gwbifrdata/23feb/45_131_23feb2024_b4_gwb.lta.1, /gwbifrdata/23feb/45_131_23feb2024_b4_gwb.lta, /gsbifrdata/24feb/45_131_24feb2024_b4_gsb.lta, /gwbifrdata/24feb/45_131_24feb2024_b4_gwb.lta
10. LogFlag File :      

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 771 MHz ,RF2 : 771 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 720 MHz, ILO2 : 720MHz , 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) : 771 771 720 720 51 51
30. Integration Time : 8.053 Sec
31. No of Antennas Working(Fringing) at the beginning :30

32. Name of Non-Working Antennas (with reason for each) :


33. Note for Backup :

34. Start and End Time of Obs.(IST): 23 Feb 2024 20:00:00 - 24 Feb 2024 05:00:00

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  	: 8
GPU_ACQ_BW  	: 100
GPU_FINAL_BW  	: 50
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 16384
GPU_CHAN_NUM  	: 0:16383:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: -1 -1
GPU_RF4  	: 850 850
GPU_DDCLO4  	: 33.000000 33.000000
GPU_SB4  	: -1 -1
GCODE4  	: 45_131
GPU_CNTRL  	: ONLINE/TGC
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  	: ON
GPU_TPA  	: From online/TGC tpa
GPU_BITS  	: 8 Bits
GPU_FILRFI  	: RFI Filterring OFF
GPU_BEAM_S  	: OFF
GPU_PFB  	: ON
GPU_PFB_TAPS  	: 4
GPU_BEAM_BIT  	: 16
GPU_VLT_BIT  	: 8
GPU_WALSH  	: OFF
GPU_ENV  	: RELEASED
--------------------------------

20:00:00 : Started setup.

===============================================
GWB TPA : 817.0 817.0 -850.0 -850.0 33.0 33.0
===============================================

20:16:00 : Started command file.
           /data1/gtac/cmd/45_131/45_131_23Feb2024_2000_cmd.py

20:38 : Observed that scintillation is present on phase cal.
20:40 : Stopped command file.

20:45 : Started scan on phase-cal to observe improvement in scintillation.
20:45 to 23:35 : Scintillation observed.
23:35 : Started next setup.
        /data1/gtac/cmd/45_131/45_131_23Feb2024_2300_setup.py
23:45 : Started scan on phase-cal to observe improvement in scintillation.
23:45 to 00:25 : Scintillation observed. 
00:25 : Data seems to be ok.
00:27 : \'/data1/gtac/cmd/45_131/45_131_23Feb2024_2300_cmd.py\' command file started.
05:00 : Stopped command file and observing session over.