GTAC Observation Log

1. Date : 16/01/2021
2. Observation Sr. No. : 12807
3. Observer : Yashwant Gupta, Shubham Singh, Kishalay De
4. Observer\'s Email : ygupta@ncra.tifr.res.in, ssingh@ncra.tifr.res.in, kde@caltech.edu
5. Project Name : Probing the microstructure emission properties of PSR B0950\\\\+08 with uGMRT
6. Project Code : 39_056
7. Operator(s) : Shilpa, Shriram
8. Command File : /odisk/gtac/cmd
9. LTA File : /gsbifrdata1/16jan/39_056_16jan2021_band4_gsb.lta, /gwbifrdata/16jan/39_056_16jan2021_band4_gwb.lta, /gwbifrdata1/16jan/39_056_16jan2021_band3_gwb.lta
10. LogFlag File :    

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 651 MHz ,RF2 : 651 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 600 MHz, ILO2 : 600MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 24+4 dB, 32 MHz,OFF, IF-CH2 : 24+4 dB, 32 MHz,OFF

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 : OFF
20. Stokes : Total_Intensity
21. Beam - 1 : OFF
22. Beam - 2 : Volt
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) : 651 651 600 600 51 51
30. Integration Time : 2.0132 Sec
31. No of Antennas Working(Fringing) at the beginning :26

32. Name of Non-Working Antennas (with reason for each) :
C03 : Mechanical Work.
C02 : Feed not rotated.
C08 : 175 pol no fringe.
C12 : LMC disconnected.
 

33. Note for Backup :

34. Start and End Time of Obs.(IST): 16 Jan 2021 04:35:00 - 16 Jan 2021 06:12:00

35. ONLINE Machine : TGC

36. No of Antennas Working(Fringing) at the end :26

37. RFI Status :

38. Comments (During Observations) :
------------GWB Setting---------------------------------------------------
GPU_MODE  	: Realtime
GPU_LTA  	: 4
GPU_ACQ_BW  	: 100.0000
GPU_FINAL_BW  	: 100
GPU_EDGE_FRQ  	: 0
GPU_CHAN_MAX  	: 1024
GPU_CHAN_NUM  	: 0:1023:1
GPU_STOKES  	: Total_Intensity
GPU_SIDEBAND  	: 1 1
GPU_RF3  	: 400  400
GPU_DDCLO3  	: 0.000000  0.000000
GPU_SB3  	: 1 1
GCODE3  	: 39_056B
GPU_RF4  	: 635  635
GPU_DDCLO4  	: 0.000000  0.000000
GPU_SB4  	: 1 1
GCODE4  	: 39_056A
GPU_CNTRL  	: 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  	: RFI Filterring OFF
GPU_BEAM_S  	: OFF
GPU_PFB  	: OFF
GPU_PFB_TAPS  	: 16
GPU_BEAM_BIT  	: 16
GPU_VLT_BIT  	: 8
GPU_ENV  	: RELEASED
--------------------------------------------------------------------------
# GSB GAC configuration is as follows : 
# BEAM-2:130 :: C01 C05 C08 C10 C13 E02 E03 E04 E05 E06 S02 S03 S04 S06 W02 W03 W04 W05 W06 Total=19
# BEAM-2:175 :: C01 C05 C10 C13 E02 E03 E04 E05 E06 S02 S03 S04 S06 W02 W03 W04 W05 W06 Total=18
--------------------------------------------------------------------------
# GWB GAC configuration is as follows : 
# BEAM-1:130 :: C00 C04 C06 C09 C11 C14 S01 W01 Total=8
# BEAM-1:175 :: C00 C04 C06 C09 C11 C14 S01 W01 Total=8
# BEAM-2:130 :: C01 C05 C08 C10 C13 E02 E03 E04 E05 E06 S02 S03 S04 S06 W02 W03 W04 W05 W06 Total=19
# BEAM-2:175 :: C01 C05 C10 C13 E02 E03 E04 E05 E06 S02 S03 S04 S06 W02 W03 W04 W05 W06 Total=18
--------------------------------------------------------------------------
04:35 : Started settings in TGC.
04:45 : Splitted antennas in two arrays.

        Started setup for both arrays.

        C02 feed not rotated though tried multiple times.
        C12 applied stow, tried servo reset, stow released but LMC shows disconnected. C12 not tracking.

C08-175 pol shows no fringe in both GSB and GWB , tried to set RF multiple times but still problem persist.

C14 - GWB shows no fringe, tried to set GAB two to three times setup. C14 started working.

05:10 : Started power equalization for both backend. 
05:20 : GWB power equalized properly, but GSB  power not equalized properly.
05:40 : Phasing done on 0837-198, but source got set.
        
05:45 : Tried multiple iteration for GSB power equalization, but power not equalized.
06:00 : Phasing done on 0902-142.

06:10 : Recorded pulsar data on source 0902-142.
06:12 : Stopped scan and observing session over.