GTAC Observation Log

1. Date : 02/09/2016
2. Observation Sr. No. : 8866
3. Observer : Nissim Kanekar, Jayaram Narayanan Chengalur, Jason X. Prochaska
4. Observer's Email : nkanekar@ncra.tifr.res.in, chengalur@ncra.tifr.res.in, xavier@ucolick.org
5. Project Name : %latex% The Spin Temperature of High-Redshift Damped Lyman-$\\\\\\\\alpha$ systems
6. Project Code : 30_068
7. Operator(s) : Deepak, Pramod, Shilpa
8. Command File : /odisk/gtac/cmd/nissim/2039\+187.cmd, /odisk/gtac/cmd/nissim/j0733\+2721.cmd, /odisk/gtac/cmd/nissim/j0214\+0157.cmd, /odisk/gtac/cmd/nissim/0407-4409.cmd, /odisk/gtac/cmd/nissim/j0733\+2721.cmd
9. LTA File : /gsbifrdata/01sep/30_068_01sep2016.lta, /gwbifrdata1/01sep/30_068_01sep2016_gwb.lta, /gsbifrdata/02sep/30_068_02sep2016.lta.2, /gsbifrdata/02sep/30_068_02sep2016.lta.1, /gsbifrdata/02sep/30_068_02sep2016.lta, /gwbifrdata1/02sep/30_068_02sep2016_gwb.lta
10. LogFlag File : /odisk/online1/logflags/PNTG.FLAGS.2104, /odisk/online1/logflags/30_068.FLAGS.24, /odisk/online1/logflags/30_068.FLAGS.23, /odisk/online1/logflags/30_068.FLAGS.22

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 375.5 MHz ,RF2 : 375.5 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 309 MHz, ILO2 : 309MHz , IVLO1 : 66.5 MHz, IVLO2 : 66.5 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 6 MHz,ON, IF-CH2 : 4+14 dB, 6 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 : 16.666666 MHz
24. Final BW : 2 MHz; Step # 1
25. Maximum Channels : 512
26. Channel Numbers : 0:511:1
27. LO5 -1  : 133.5
28. LO5 -2  : 171.5

29. Frequency Parameters (TPA) : 375.5 375.5 309 309 66.5 66.5
30. Integration Time : 16.1061 Sec
31. No of Antennas Working(Fringing) at the beginning :25

32. Name of Non-Working Antennas (with reason for each) :
W04 : abc timeout.
C14,E04,S03,W03 : No cone-dipole feed.
33. Note for Backup :

34. Start and End Time of Obs.(IST): 01 Sep 2016 23:00:00 - 02 Sep 2016 09:42:00

35. ONLINE Machine : Shivneri

36. No of Antennas Working(Fringing) at the end :25

37. Comments (During Observations) :
23:00 : Started settings.
Settings for Observation-1:

GSB settings : 
Line frequency : 378.57 MHz
   RF Band     : 327 MHz
   LO(1)       : 309 MHz
   IF BW       : 6 MHz
   LO(5)       : 133.5 171.5 MHz
   LO(4)       : 66.5 66.5 MHz
   Baseband BW : 2.08 MHz
   Step        : 1
   Channels    : 512
   TPA 275.5 275.5 309 309 66.5 66.5

GWB settings: NARROW-BAND MODE
   ACQ BW       : 100 MHz
   GAB LO       : 500 MHz
   Channels     : 2048
   LTA          : 8
   Stokes       : 2
   TPA frequency: Manual (LOCAL)
   Sideband FLAG: Flipped (LSB)
   Decimation factor: 32
   Final BW     : 3.125 MHz
   DDC LO       : 53.4 MHz
   Channel 1    : 446.6 MHz
   Channel 2048 : 443.475 MHz

23:24 : '/odisk/gtac/cmd/nissim/2039+187.cmd' command file started.
        But phase and amplitude are not stable.
23:57 : Changed settings to default LO1 255MHz, but phase and amplitude seems to be ok.
00:13 : Due to strong spikes in band 360MHz to 380MHz, phase and amplitude are not stable.
00:17 : Halted GSB. 
---------------------------------------------------------------------------
00:17 : Changed the settings.
Settings for Observation-2:

Line frequency : 407.16 MHz
    RF Band     : 327 MHz
    LO(1)       : 475 MHz
    IF BW       : 18 MHz
    LO(5)       : 137.4 167.6
    LO(4)       : 62.6 62.6 MHz
    Baseband BW : 2.08 MHz
    Step        : 2
    Channels    : 512
    TPA 412.4 412.4 475 475 62.6 62.6

00:31 : '/odisk/gtac/cmd/nissim/j0214+0157.cmd' command file started.
02:43 : Stopped command file and halted GSB.
---------------------------------------------------------------------------
02:45 : Changed settings.
Settings for observation-3:

Line frequency : 487.61 MHz
   RF Band     : 327 MHz
   LO(1)       : 560 MHz
   IF BW       : 18 MHz
   LO(5)       : 135 170 MHz
   LO(4)       : 65 65 MHz
   Baseband BW : 2.08 MHz
   Step        : 3
   Channels    : 512
   TPA 495 495 560 560 65 65

GWB settings: NARROW-BAND MODE
   ACQ BW       : 100 MHz
   GAB LO	: 480 MHz
   Channels     : 16384
   LTA          : 8
   Stokes       : 2
   TPA frequency: Manual (LOCAL)
   Sideband FLAG: Flipped (LSB)
   Decimation factor: 4
   Final BW	: 25 MHz
   DDC LO	: 70 MHz
   Channel 1	: 410 MHz
   Channel 16384: 385 MHz
02:55 : '/odisk/gtac/cmd/nissim/0407-4409.cmd' command file started.
05:50 : Stopped command file and halted GSB.
---------------------------------------------------------------------------
05:50 : Changed the settings.
Settings for Observation-4:

Line frequency : 477.3 MHz
   RF Band     : 327 MHz
   LO(1)       : 545 MHz
   IF BW       : 18 MHz
   LO(5)       : 139.6 165.4 MHz
   LO(4)       : 60.4 60.4 MHz
   Baseband BW : 2.08 MHz
   Step        : 3
   Channels    : 512
   TPA 484.6 484.6 545 545 60.4 60.4
06:06 : '/odisk/gtac/cmd/nissim/j0733+2721.cmd' command file started.
09:47 : Stopped command file and observation session is over.