GTAC Observation Log

1. Date : 17/07/2023
2. Observation Sr. No. : 15618
3. Observer : Sangita Kumari, Bhaswati Bhattacharyya, Jayanta Roy
4. Observer\'s Email : skumari@ncra.tifr.res.in, bhaswati.bhattacharyya78@gmail.com, jroy@ncra.tifr.res.in
5. Project Name : Investigating variations of dispersion measure for the spider MSP J1959\\\\+2048 and its possible implications towards the timing studies
6. Project Code : 44_081
7. Operator(s) : Navnath
8. Command File : /odisk/gtac/cmd
9. LTA File : /gwbifrdata2/17jul/44_081b_17jul2023_subar2_b4_gwb.lta, /gwbifrdata2/17jul/44_081a_17jul2023_subar1_b3_gwb.lta
10. LogFlag File :  

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 306 MHz ,RF2 : 306 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 255 MHz, ILO2 : 255MHz , 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) : 306 306 255 255 51 51
30. Integration Time : 16.1061 Sec
31. No of Antennas Working(Fringing) at the beginning :28

32. Name of Non-Working Antennas (with reason for each) :
E03 : Mechanical Work.
C14 : RF Not set.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 17 Jul 2023 03:00:00 - 17 Jul 2023 05:00:00

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  	: 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_RF2  	: 1200  1200
GPU_DDCLO2  	: 0.000000  0.000000
GPU_SB2  	: 1 1
GCODE2  	: SUBA2
GPU_RF4  	: 470  470
GPU_DDCLO4  	: 0.0000  0.0000
GPU_SB4  	: 1 1
GCODE4  	: SUBA4
GPU_CNTRL  	: ONLINE/TGC
GPU_FSTOP  	: ON
GPU_BEAM_1  	: PA
GPU_BEAM_2  	: OFF
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-1:130 :: C00 C01 C02 C03 C04 C05 C06 E02 S01 W01 W02 Total=11
# BEAM-1:175 :: C00 C01 C02 C03 C04 C05 C06 E02 S01 W01 W02 Total=11
# BEAM-2:130 :: Total=0
# BEAM-2:175 :: Total=0
# BEAM-3:130 :: C08 C09 C10 C11 C12 C13 E04 S02 S03 S04 W03 W04 Total=12
# BEAM-3:175 :: C08 C09 C10 C11 C12 C13 E04 S02 S03 S04 W03 W04 Total=12
# BEAM-4:130 :: Total=0
# BEAM-4:175 :: Total=0
------------------------------------------------------------
03:00:00 : Started setup.
03:42:38 : Started scan on 2052+365 for ~ 0.626349 min. # bad scan
03:46:35 : Started scan on J1959+2048 for ~ 0.626349 min. # band scan
03:40:00 : command file having error( zero on source time).exited!.
04:01:46 : Started scan on J1959+2048 for ~ 6.35297 min. # bad scan
         : pulsar recording problem due to zero time
04:10:00 : Started manually on pulsar source recording.
04:13:24 : Started scan on J1959+2048 for ~ 47.3341 min.
05:00:00 : Observation session stop.
------------------------------------------------
Note :  I regret to inform you that I encountered an issue during the pulsar data recording process. The recording script exited due to a zero value on the source time in the setup file. As a result, a significant amount of time was lost in the process of debugging the error and attempting to understand why the pulsar data was not being recorded.
Upon further investigation, it was discovered that there were two versions of setup instructions sent by user. Unfortunately, the earlier version, which included zero values for both phase and on-source time, was mistakenly used. The control room reported this error three days ago, and the user promptly sent an updated version of the setup instructions. However, due to an oversight, the wrong version/a of the setup instructions was downloaded.
	Please note that approximately 45 minutes of on-source time was lost due to this mistake. I sincerely apologize for this.
                    -NJS.
--------------------------------------------------------------