GTAC Observation Log

1. Date : 21/02/2024
2. Observation Sr. No. : 16413
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) : Sachin, Shilpa, Shriram, Surender
8. Command File : /data1/gtac/cmd/45_131/45_131_20Feb2024_2000_cmd.py,, /data1/gtac/cmd/45_131/45_131_21Feb2024_0300_cmd.py
9. LTA File : /gsbifrdata1/20feb/45_131_20feb2024_b4_gsb.lta, /gwbifrdata1/20feb/45_131_20feb2024_b4_gwb.lta, /gsbifrdata/21feb/45_131_21feb2024_b4_gsb.lta, /gwbifrdata/21feb/45_131_21feb2024_b4_gwb.lta
10. LogFlag File :      

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 666 MHz ,RF2 : 666 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 615 MHz, ILO2 : 615MHz , 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) : 666 666 615 615 51 51
30. Integration Time : 4.0265 Sec
31. No of Antennas Working(Fringing) at the beginning :28

32. Name of Non-Working Antennas (with reason for each) :
S04 : 130 pol Rf not set.
W02 : Feed not rotating.
33. Note for Backup :

34. Start and End Time of Obs.(IST): 20 Feb 2024 20:00:00 - 21 Feb 2024 05:01:00

35. ONLINE Machine : TGC

36. No of Antennas Working(Fringing) at the end :28

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  	: 635  635
GPU_DDCLO4  	: 0.000000  0.000000
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 : Started settings.
20:30 : Started command file,
       \'/data1/gtac/cmd/45_131/45_131_20Feb2024_2000_cmd.py\'
20:50 to 22:46 : Scintillation observed on phase cal 0943-083. Paused command file.
22:47 : Restarted command file.
23:37 to 01:17 : Scintillation observed.
02:53 : Stopped command file.

02:54 : Changed DDC LO.

03: 00 : \'/data1/gtac/cmd/45_131/45_131_21Feb2024_0300_cmd.py\' command file started.
05:01 : Stopped command file and observing session over.