GTAC Observation Log 

1. Date : 2/8/2013
2. Observation Sr. No. : 6638
3. Observer : Nissim Kanekar,Nirupam Roy
4. Observer's Email : nkanekar@ncra.tifr.res.in,nroy@aoc.nrao.edu
5. Project Name : Low-frequency observations of a gas cloud meeting the Galactic Centre black hole
6. Project Code : 24_053
7. Operator(s) : Navanath,Pramod,Surender
8. Command File : /odisk/gtac/cmd/nissim/sgra.cmd
9. LTA File : /gsbifrdata/02aug/24_053_02aug2013.lta,
10. LogFlag File : /odisk/online1/logflags/24_053.FLAGS.26,

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 591 MHz ,RF2 : 591 MHz, SA1 : 0 dB, SA2 :  dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540 MHz , 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 Mode : Realtime 
15. GSB LTA : 8 
16. GSB CTRL : ONLINE 
17. GSB Fstop : ON 
18. GAIN EQ : OFF, 
19. Stokes : TotIntensity
20. Beam - 1 : OFF
21. Beam - 2 : OFF
22. ACQ BW : 33.33 MHz
23. Final BW : 33.333333 MHz; Step # 0
24. Maximum Channels : 512 
25. Channel Numbers : 0:511:1 
26. LO5 -1  : 149.00 
27. LO5 -2  : 156.00 

28. Frequency Parameters (TPA) : 591 591 540 540 51 51.
29. Integration Time : 16.106112 Sec.
30. No of Antennas Working(Fringing) :28

31. Name of Non-Working Antennas (with reason for each) :
E05 : BLDC
C11 : NO fringe.
32. Note for Backup :

33. Start and End Time of Obs.(IST): 18:40 - 02:00

34. ONLINE Machine : Shivneri

35. Comments (During Observations) :
18:30 : Started set up.
18:45 : power eq done on SGRA ~400 counts.
18:49 : Started command file.
18:58 : power failure for eight central sq. antennas(C00,C01,C02,C05,C06,C08,C09,C12)
19:46 : Power recovered and started working (C00,C01,C02,C05,C06,C08,C09,C12) antennas. 
20:27 : C03 ABC time out. 
22:17 : C03 and C11 Started working.
00:58 : cmd file stopped.
01:06 : Started scan on flux cal.
02:00 : Observing session over.
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