GTAC Observation Log 

1. Date : 05/6/2013
2. Observation Sr. No. : 6532
3. Observer : Nissim Kanekar
4. Observer's Email : nkanekar@ncra.tifr.res.in
5. Project Name : Low-frequency observations of a gas cloud meeting the Galactic Centre black hole
6. Project Code : 24_053
7. Operator(s) : Surender
8. Command File : /odisk/gtac/cmd/nissim/sgra.cmd
9. LTA File : /gsbifrdata/06jun/24_053_06jun2013.lta,
	/gsbifrdata/06jun/24_053_06jun2013_2s.lta,
	/gsbifrdata/06jun/24_053_06jun2013.lta.2,
	/gsbifrdata/06jun/24_053_06jun2013_2s.lta.1
10. LogFlag File : /odisk/online1/logflags/24_053.FLAGS.19,
	/odisk/online1/logflags/24_053.FLAGS.20

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 : 255 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. GAIN EQ : ON 
17. Stokes : Total_Intensity
18. Beam - 1 : OFF
19. Beam - 2 : OFF
20. ACQ BW : 32 MHz
21. Maximum Channels : 512 
22. IFBW (MHz) : LO5 (KHz) : 32:149000-156000
23. Final Bandwidth (MHz): OFF MHz; Step # 0

24. Frequency Parameters (TPA) : 306 306 255 255 51 51.
25. Integration Time : 2.013 Sec.
26. No of Antennas Working(Fringing) :25

27. Name of Non-Working Antennas (with reason for each) :
C05 : No fringe.
E03 : BLDC.
E05 : Servo problem.
W02 : Servo problem.
S01 : Servo problem.



28. Note for Backup :--

29. Start and End Time of Obs.(IST): 23:00 - 05:34

30. ONLINE Machine : Shivneri

31. Comments (During Observations) :
23:35 : Pointing done.
23:55 : Power eq done on 3C286.
00:07 : Started scan on 3C286 for ~ 10min.
00:23 : Started command file.
04:15 : Stopped command file.
04:24 : Started scan on 3C48 for ~ 10min.
--------------------------------------------------------------------
04:36 : Halt the gsb started with following setting.
ALCs OFF, GSB gain OFF, 14 dB Solar attenuator ON.

    RF              : 325 MHz
    IF BW           : 6 MHz
    Final BW        : 4 MHz
    LO(1)           : 255 255 MHz
    LO(4)           : 67 MHz
    LO(5)           : 133 172 MHz
    Step            : 0
    Correlator      : Standard GSB
    lta 8m

Channels : 512
TPA 322 322 255 255 67 67
--------------------------------------------------------------
04:51 : Power eq done on SGRA.
04:52 : Started scan on SGRA.
05:09 : Stopped scan 
05:17 : Started scan on 3C48.
05:34 : Stopped  observation.