GTAC Observation Log

1. Date : 15/01/2022
2. Observation Sr. No. : 13860
3. Observer : Ayan Biswas, Poonam Chandra, Barnali Das, Wade, James Barron
4. Observer\'s Email : ayan.scc2@gmail.com, poonam@ncra.tifr.res.in, barnali@ncra.tifr.res.in, marmottecam@yahoo.ca, j.barron@queensu.ca
5. Project Name : Detailed Study of the Magnetic O-star Binary HD148937: The First Ever Magnetic O-star System Detected at Sub-GHz Frequencies
6. Project Code : 41_009
7. Operator(s) : Nilesh, Sachin
8. Command File : /data1/gtac/cmd/41_009/15_Jan/obs1.py
9. LTA File : /gsbifrdata1/15jan/41_009b_15jan2022_subar3_band4_gsb.lta, /gsbifrdata1/15jan/41_009a_15jan2022_subar4_band5_gsb.lta, /gwbifrdata1/15jan/41_009b_15jan2022_subar3_band4_gwb.lta, /gwbifrdata1/15jan/41_009a_15jan2022_subar4_band5_gwb.lta
10. LogFlag File :  

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1399 MHz ,RF2 : 1399 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1450 MHz, ILO2 : 1450MHz , 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 : Full_Stokes
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) : 1399 1399 1450 1450 51 51
30. Integration Time : 4.0265 Sec
31. No of Antennas Working(Fringing) at the beginning :27

32. Name of Non-Working Antennas (with reason for each) :
C03 : Mechanical Work.
S04 : GAB-CH1 Not set.
W04 : FPS not focused.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 15 Jan 2022 07:00:00 - 15 Jan 2022 12:00:00

35. ONLINE Machine : TGC

36. No of Antennas Working(Fringing) at the end :27

37. RFI Status :SCAN 0 : Initial ~2 min data at Band5 is affected by satellite RFI. 

38. Comments (During Observations) :
07:00 : Started settings.

------------GWB Setting---------
GPU_MODE  	: Realtime
GPU_LTA  	: 4
GPU_ACQ_BW  	: 400.0000
GPU_FINAL_BW  	: 400
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 2048
GPU_CHAN_NUM  	: 0:2047:1
GPU_STOKES  	: Full_Stokes
GPU_RF3  	: 550  550
GPU_DDCLO3  	: 0.000000  0.000000
GPU_SB3  	: 1 1
GCODE3  	: 41_009B
GPU_RF4  	: 1460  1460
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: -1 -1
GCODE4  	: 41_009A
GPU_CNTRL  	: 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  	: 4 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
--------------------------------

SUBAR 3 : BAND4 : 41_023B ; TPA : 500 500 -500 -500 0 0
c01 c04 c06 c09 c11 c13 e02 e04 e06 s02 s04 w01 w03 w05


SUBAR 4 : BAND5 : 41_023A ; TPA : 1460 1460 -1460 -1460 0 0
c00 c02 c05 c08 c10 c12 c14 e03 e05 s01 s03 s06 w02 w04 w06

07:18 : Started power eq at 120 counts.

07:21 : ELECTRICAL power failure for all antennas.
07:33 : ELECTRICAL power restored back for all antennas.
        Reconfigured settings, and started power equalize.

07:39 : Started command file.
             /data1/gtac/cmd/41_009/15_Jan/obs.py

NOTE:
SCAN 0 : Initial ~2 min data at Band5 is affected by satellite RFI. 

11:38 : Source set below horizon. stopped command file.
11:43 : Started scan on phase cal for 5 min.
11:54 : Stopped scan and observation closed.