GTAC Observation Log

1. Date : 10/12/2021
2. Observation Sr. No. : 13740
3. Observer : Sangita Kumari, Bhaswati Bhattacharyya, Devojyoti Kansabanik, Jayanta Roy
4. Observer\'s Email : skumari@ncra.tifr.res.in, bhaswati@ncra.tifr.res.in, dkansabanik@ncra.tifr.res.in, jroy@ncra.tifr.res.in
5. Project Name : Investigating DM variations for the spider MSPs and its possible implications towards the timing studies
6. Project Code : 41_069
7. Operator(s) : Deepak, Nilesh, Sachin
8. Command File : /data1//gtac/cmd/41_069/41_069_10Dec2021_1200_cmd.py
9. LTA File : /gwbifrdata/10dec/41_069b_10dec2021_gwb.lta, /gwbifrdata/10dec/41_069a_10dec2021_gwb.lta
10. LogFlag File : /odisk/online1/logflags/

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 :27

32. Name of Non-Working Antennas (with reason for each) :
C03 : Mechanical Work.
E04 : Maintenance.
C04 : Servo work.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 10 Dec 2021 12:00:00 - 10 Dec 2021 19:00:00

35. ONLINE Machine : TGC

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

37. RFI Status :

38. Comments (During Observations) :
11:10 : Started settings.

------------GWB Setting---------
GPU_MODE  	: Realtime
GPU_LTA  	: 8
GPU_ACQ_BW  	: 200.0000
GPU_FINAL_BW  	: 200
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 4096
GPU_CHAN_NUM  	: 0:4095:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: -1 -1
GPU_RF1  	: 500  500
GPU_DDCLO1  	: 540.000000  540.000000
GPU_SB1  	: -1 -1
GCODE1  	: 41_069A
GPU_RF2  	: 550  550
GPU_DDCLO2  	: 0.000000  0.000000
GPU_SB2  	: 1 1
GCODE2  	: 41_069B
GPU_CNTRL  	: ONLINE/TGC
GPU_FSTOP  	: ON
GPU_BEAM_1  	: OFF
GPU_BEAM_2  	: PA
GPU_BEAM_3  	: PA
GPU_BEAM_4  	: OFF
GPU_BM_INT  	: 4
GPU_GAINEQ  	: ON
GPU_TPA  	: From online/TGC tpa
GPU_BITS  	: 8 Bits
GPU_FILRFI  	: RFI Filterring 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
--------------------------------

# GWB GAC configuration is as follows : 
# BEAM-2:130 :: C00 C01 C02 C05 C06 C08 E02 E03 E06 S01 S02 W01 W02 W03 Total=14
# BEAM-2:175 :: C00 C01 C02 C05 C06 C08 E02 E03 E06 S01 S02 W01 W02 W03 Total=14
# BEAM-3:130 :: C09 C10 C11 C12 C13 C14 E05 S03 S04 S06 W04 W05 W06 Total=13
# BEAM-3:175 :: C09 C10 C11 C12 C13 C14 E05 S03 S04 S06 W04 W05 W06 Total=13

11:20 : Started power eq on 1459+716.
11:30 : Started phasing on 1459+716.
11:40 : Started command file.
              /data1//gtac/cmd/41_069/41_069_10Dec2021_1200_cmd.py

12:10 : GAC settings changed.

# BEAM-2:130 :: C00 C01 C02 C05 C06 C08 E02 E03 S01 S02 W01 W02 W03 Total=13
# BEAM-2:175 :: C00 C01 C02 C05 C06 C08 E02 E03 S01 S02 W01 W02 W03 Total=13
# BEAM-3:130 :: C09 C10 C11 C12 C13 C14 S03 S04 W04 Total=9
# BEAM-3:175 :: C09 C10 C11 C12 C13 C14 S03 S04 W04 Total=9


14:00 : ANTENNAS AZ OUTER TRACK LIMIT HIT, TRACK CHANGED TO INNER.

14:18 : STARTED SCAN ON J1959+2048.
 
17:45 : Satellite RFI at band3 on phase cal.
18:00 : Re-phasing on phase calibrator.
18:10 : Restarted command file.
19:15 : Observation stopped.