GTAC Observation Log

1. Date : 23/02/2024
2. Observation Sr. No. : 16416
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) : Deepak, Pramod, Sachin, Shilpa, Surender
8. Command File : /data1/gtac/cmd/45_131/45_131_22Feb2024_2000_cmd.py,, /data1/gtac/cmd/45_131/45_131_23Feb2024_0200_cmd.py
9. LTA File : /gsbifrdata1/22feb/45_131_22feb2024_b4_gsb.lta, /gwbifrdata2/22feb/45_131_22feb2024_b4_gwb.lta, /gsbifrdata/23feb/45_131_23feb2024_b4_gsb.lta, /gwbifrdata/23feb/45_131_23feb2024_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 : 8.053 Sec
31. No of Antennas Working(Fringing) at the beginning :29

32. Name of Non-Working Antennas (with reason for each) :
S03 : Strong RFI.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 22 Feb 2024 20:00:00 - 23 Feb 2024 05:31:00

35. ONLINE Machine : TGC

36. No of Antennas Working(Fringing) at the end :29

37. RFI Status :

38. Comments (During Observations) :

------------GWB Setting---------------------------------------------------
GPU_MODE  	: Realtime
GPU_LTA  	: 4
GPU_ACQ_BW  	: 200.0000
GPU_FINAL_BW  	: 200
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 2048
GPU_CHAN_NUM  	: 0:2047:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: 1 1
GPU_RF4  	: 550  550
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: 1 1
GCODE4  	: 45_131
GPU_CNTRL  	: ONLINE/TGC
GPU_FSTOP  	: ON
GPU_BEAM_1  	: OFF
GPU_BEAM_2  	: OFF
GPU_BEAM_3  	: 4
GPU_BEAM_4  	: VOLTAGE
GPU_BM_INT  	: 32
GPU_GAINEQ  	: ON
GPU_TPA  	: From online/TGC tpa
GPU_BITS  	: 8 Bits
GPU_FILRFI  	: Voltage Detection
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
--------------------------------------------------------------------------
19:40 : Started commnad file.
        \'/data1/gtac/cmd/45_131/45_131_22Feb2024_2000_cmd.py\'
01:35 : Stopped command file.
        Halted GSB and GWB and estarted with corr setup.
02:00 : \'/data1/gtac/cmd/45_131/45_131_23Feb2024_0200_cmd.py\' command file started.
02:10 : Noticed that, junk data (ramp phases) was recorded in GWB.
        Checked the setup.
        Noticed that DDCLO was not mentioned in setup file, so DDCLO was not set.
02:30 : DDCLO was set.
02:45 : Checked fringes on flux cal.
02:47 : Restarted command file.
05:31 : Stopped command file and observing session over.