GTAC Observation Log

1. Date : 29/09/2020
2. Observation Sr. No. : 12473
3. Observer : Nithyanandan Thyagarajan, Nissim Kanekar, Gianni Bernardi
4. Observer\'s Email : t_nithyanandan@nrao.edu, nkanekar@ncra.tifr.res.in, giannibernardi75@gmail.com
5. Project Name : %latex% The low-frequency radio properties of quasars at  $z\\\\\\\\ge 6$
6. Project Code : 38_056
7. Operator(s) : Navnath
8. Command File : /odisk/gtac/cmd/nissim/38_056_29sept.cmd, /data1/gtac/cmd/sep29_obs.py
9. LTA File : /gsbifrdata1/28sep/38_056_28sep2020_gsb.lta, /gwbifrdata1/28sep/38_056_28sep2020_gwb.lta, /gsbifrdata/29sep/38_056_29sep2020_gsb.lta.1, /gsbifrdata/29sep/38_056_29sep2020_gsb.lta, /gwbifrdata/29sep/38_056_29sep2020_gwb.lta.1, /gwbifrdata/29sep/38_056_29sep2020_gwb.lta
10. LogFlag File :  

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 311 MHz ,RF2 : 311 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 260 MHz, ILO2 : 260MHz , 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
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) : 311 311 260 260 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 : Mechanical Work
S02 : feed jam.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 29 Sep 2020 00:00:00 - 29 Sep 2020 07:05:00

35. ONLINE Machine : Shivneri

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

37. RFI Status :

38. Comments (During Observations) :
00:00 : Started setup through TGC
      : Corr das chain started successfully.
      : GWB power eq done on 3C48 at 120 counts
00:20 : Started scan on 3C48 for ~ 24.9645 min
-------------------------------------------------------------------
      :Took long scan on 3C48 because  nk.list source list has many sources and has multiple/duplicate entry of sources. also it have many sources with 1950 epoch.
       It took time ( ~15 min) to make separate source list for TGC. conv_csv.py does not allow to  convert duplicate sources to csv format and also with 1950. 1950.0 epoch. extracted require source co ordinate for this observation and made source list in TGC format.
--------------------------------------------------------------------------

00:55 : Started cmd file through TGC

       /data1/gtac/cmd/sep29_obs.py

01:00  : to change track from inner to outer tried to stop cmd file but
       : TGC GUI not showing script status 
       : TGC GUI slow and not responding 
       : Script Manager also not showing running script id.

01:30  : TGC halted and started switch back to ONLINE.
       : 2 hours of observation time loss during this process.
       : 00:00 to 02:00 

02:00  : Started cmd file. 

        /odisk/gtac/cmd/nissim/38_056_29sept.cmd

        : Not observed sources and it\'s phase cal. 15min
          1. J0844-0052   12 min
          2. J0844+0226   12 min
          3. J0910-0414   12 min
      
05:35 : started cmd file
                    /odisk/gtac/cmd/nissim/38_056_end.cmd

07:05 : Observation session over.