GTAC Observation Log

1. Date : 22/10/2014
2. Observation Sr. No. : 7378
3. Observer : Abhik Ghosh, samir choudhuri, Somnath Bharadwaj, Saiyad Ali, Jayaram Narayanan Chengalur
4. Observer's Email : ghosh@astro.rug.nl, samir.svc@gmail.com, somnath@phy.iitkgp.ernet.in, saiyad@phys.jdvu.ac.in, chengalur@ncra.tifr.res.in
5. Project Name : Characterizing the Galactic Synchrotron emission at 150 MHz
6. Project Code : 26_013
7. Operator(s) : Nilesh, Sachin, Shilpa
8. Command File : /odisk/gtac/cmd/26_013/9sep14_obs.cmd
9. LTA File : /gsbifrdata/22oct/26_013_22oct2014_16s.lta,/gsbifrdata1/22oct/26_013_22oct2014_2s.lta
10. LogFlag File : /odisk/online1/logflags/26_013.FLAGS.11

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 156 MHz ,RF2 : 156 MHz, SA1 : 14 dB, SA2 : 14 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 218 MHz, ILO2 : 218MHz , IVLO1 : 62 MHz, IVLO2 : 62 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 12+10 dB, 16 MHz,ON, IF-CH2 : 12+10 dB, 16 MHz,ON

GSB SETTINGS :

14. GSB Host : gsbm1
15. GSB Mode : Realtime
16. GSB LTA : 8
17. GSB CTRL : ONLINE
18. GSB Fstop : ON
19. GAIN EQ : ON
20. Stokes : Full_Stokes
21. Beam - 1 : OFF
22. Beam - 2 : OFF
23. ACQ BW : 16.666666 MHz
24. Final BW : 16.666666 MHz; Step # 
25. Maximum Channels : 512
26. Channel Numbers : 0:511:1
27. LO5 -1  : 138
28. LO5 -2  : 167

29. Frequency Parameters (TPA) : 156 156 218 218 62 62
30. Integration Time : 2.0132 Sec
31. No of Antennas Working(Fringing) at the beginning :20

32. Name of Non-Working Antennas (with reason for each) :
C01 : No fringe.
C10 : No fringe.
C11 : Low fringe.
C12 : No fringe.
E05 : Maintenance.
E06 : BLDC work.
S03 : No fringe.
S06 : Feed Jammed.
W03 : Feed Cage Suppport Truss.
S01 : Bad Band-shape(due to RFI).

33. Note for Backup :

34. Start and End Time of Obs.(IST): 21 Oct 2014 23:20:00 - 22 Oct 2014 08:37:00

35. ONLINE Machine : Shivneri

36. No of Antennas Working(Fringing) at the end :20

37. Comments (During Observations) :
23:10 : Started settings @ 150 MHz.
23:45 : Started scan on 3C48 for ~ 16min.
00:04 : Started command file.
08:01 : E-arm power failed.
08:18 : Stopped commad file.
        S01 bandshape seems to be fine.
        GSB shows buffer loss.
08:22 : Started scan on 3C147.
        E02,E04 started working.
        E03 shows strong RFI lines.
08:37 : Stopped scan and observing session over.