GTAC Observation Log 

1. Date : 4/7/2013
2. Observation Sr. No. : 6586
3. Observer : Nirupam Roy,Nissim Kanekar
4. Observer's Email : nroy@aoc.nrao.edu,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) : Navanath,Rupsingh,Surender
8. Command File : /odisk/gtac/cmd/nissim/sgra.cmd
9. LTA File : /gsbifrdata/04jul/24_053_04jul2013_8s.lta,/gsbifrdata/04jul/24_053_04jul2013_16s.lta,/gsbifrdata/04jul/24_053_04jul2013_16s.lta.1,
10. LogFlag File : /odisk/online1/logflags/24_053.FLAGS.24,/odisk/online1/logflags/24_053.FLAGS.25,

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 306 MHz ,RF2 : 306 MHz, SA1 : 0 dB, SA2 :  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 : 4+12 dB, 32 MHz,ON, IF-CH2 : 4+12 dB, 32 MHz,ON

GSB SETTINGS :

14. GSB Mode : Realtime 
15. GSB LTA : 8 
16. GSB CTRL : ONLINE 
17. GSB Fstop : ON 
18. GAIN EQ : ON 
19. Stokes : TotIntensity
20. Beam - 1 : OFF
21. Beam - 2 : OFF
22. ACQ BW : 33.33 MHz
23. Final BW : OFF 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) : 306 306 255 255 51 51.
29. Integration Time : 8.053056 Sec.
30. No of Antennas Working(Fringing) :26

31. Name of Non-Working Antennas (with reason for each) :
E05 : BLDC.
W05 : No fringe.
E04 : ABC time-out.
S01 : Low fringe @130 pol.
W04 : Maintenance .
32. Note for Backup :

33. Start and End Time of Obs.(IST): 22:00 - 04:00

34. ONLINE Machine : 

35. Comments (During Observations) :
    # 2s data file #
/gsbifrdata1/04jul/24_053_04jul2013_2s.lta,
/gsbifrdata1/04jul/24_053_04jul2013_2s.lta.1
----------------------------------------------------------------------
22:00 : Started setup.
22:22 : Started scan on 3c286 for 15min.
22;37 : scan stopped.
22:40 : Started cmd file.
 
     /odisk/gtac/cmd/nissim/sgra.cmd

02:17 : Command file stopped.
02:25 : Started scan on 3C48.
02:40 : Stopped scan & hltndas.for next session
----------------------------------------------------------------------
02:41 : Started setup 
       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
02:45 : MSCEB power failure.
03:05 : Power eq on SGRA @800 counts(Only central square).
03:08 : Started scan on SGRA (Only central square).
03:09 : MSCEB power resume.
03:15 : Stopped scan.
03:24 : Started scan on 3C48.
04:00 : Stopped scan & observation session over.