GTAC Observation Log

1. Date : 01/04/2024
2. Observation Sr. No. : 16596
3. Observer : Ankita Ghosh, Bhaswati Bhattacharyya, Arpan Pal, Sangita Kumari
4. Observer\'s Email : ankita@ncra.tifr.res.in, bhaswati@ncra.tifr.res.in, apal@ncra.tifr.res.in, skumari@ncra.tifr.res.in
5. Project Name : Constraining the eclipse medium through plasma lensing in redback MSP J1908\\\\+2105
6. Project Code : ddtC338
7. Operator(s) : Rupsing, Sachin, Shilpa, Shriram
8. Command File : /data1/gtac/cmd/DDTC338/ddtC338_01Apr2024_0300_cmd.py
9. LTA File : /gwbifrdata2/01apr/ddtc338_01apr2024_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 :30

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

33. Note for Backup :

34. Start and End Time of Obs.(IST): 01 Apr 2024 03:00:00 - 01 Apr 2024 11:00:00

35. ONLINE Machine : TGC

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

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  	: 4096
GPU_CHAN_NUM  	: 0:4095:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: 1 1
GPU_RF4  	: 550  550
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: 1 1
GCODE4  	: DDTC338
GPU_CNTRL  	: ONLINE/TGC
GPU_FSTOP  	: ON
GPU_BEAM_1  	: VOLTAGE
GPU_BEAM_2  	: VOLTAGE
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  	: Voltage Detection
GPU_BEAM_S  	: OFF
GPU_PFB  	: OFF
GPU_PFB_TAPS  	: 4
GPU_BEAM_BIT  	: 16
GPU_VLT_BIT  	: 4
GPU_WALSH  	: OFF
GPU_ENV  	: RELEASED
------GWB RFI Filter Setting----------------------------------------------
FILTERED_SIGNALS	:	RFI_ALL			# RFI_ALL=All signals filtered / RFI_CH1 =Channel 1 only / RFI_CH2=Channel 2 only
EXTERNAL MEDIAN	:	0			# integer value(-128 to 127)
THRESHOLD VALUE	:	3			# integer value(0 to 127)
CONSTANT VALUE		:	0			# integer value(-128 to 127)
FILTERING OPTION	:	DIGITAL NOISE		# BYPASS / CONSTANT=constant value is used / THRESHOLD / DIGITAL_NOISE
DDC_STATUS		:	OFF			# DDC = ON/OFF
--------------------------------------------------------------------------
03:00 : Started settings.
--------------------------------------------------------------------------
# GWB GAC configuration is as follows : 
# BEAM-1:130 :: C00 C01 C02 C03 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 E02 E03 S01 S02 W01 W02 W03 Total=21
# BEAM-1:175 :: C00 C01 C02 C03 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 E02 E03 S01 S02 W01 W02 W03 Total=21
# BEAM-2:130 :: C00 C01 C02 C03 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 E02 E03 S01 S02 W01 W02 W03 Total=21
# BEAM-2:175 :: C00 C01 C02 C03 C04 C05 C06 C08 C09 C10 C11 C12 C13 C14 E02 E03 S01 S02 W01 W02 W03 Total=21
--------------------------------------------------------------------------
03:20 : Started command file,
        \'/data1/gtac/cmd/DDTC338/ddtC338_01Apr2024_0300_cmd.py\'
03:42 : S03 broadband RFI. Removed from GAC. restarted scan.
04:25 : C11 removed due to bad phasing.
06:45-07:00 : change of track.
--------------------------------------------------------------------------
07:55 : C01 servo problem and removed from GAC.
--------------------------------------------------------------------------
10:45 : C01 started working, so added in GAC.
10:45 : C04 taken for maintenance, so removed from GAC.
11:00 : Stopped command file and observing session over.