GTAC Observation Log

1. Date : 18/02/2017
2. Observation Sr. No. : 9202
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 : 31_094
7. Operator(s) : Deepak, Nilesh, Shilpa, Surender
8. Command File : /odisk/gtac/cmd/nissim/j0934\+3050.cmd,, /odisk/gtac/cmd/nissim/j1125\+3338.cmd
9. LTA File : /gsbifrdata1/17feb/31_094_17feb2017.lta.2, /gsbifrdata1/17feb/31_094_17feb2017.lta.1, /gsbifrdata1/17feb/31_094_17feb2017.lta
10. LogFlag File : /odisk/online1/logflags/31_094.FLAGS.3, /odisk/online1/logflags/31_094.FLAGS.2

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 448.1 MHz ,RF2 : 448.1 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 510 MHz, ILO2 : 510MHz , IVLO1 : 61.9 MHz, IVLO2 : 61.9 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 16 MHz,ON, IF-CH2 : 4+14 dB, 16 MHz,ON

GSB SETTINGS :

14. GSB Host : gsbm1_lenyadri
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 : 4 MHz; Step # 1
25. Maximum Channels : 512
26. Channel Numbers : 0:511:1
27. LO5 -1  : 138.1
28. LO5 -2  : 166.9

29. Frequency Parameters (TPA) : 448.1 448.1 510 510 61.9 61.9
30. Integration Time : 16.1061 Sec
31. No of Antennas Working(Fringing) at the beginning :27

32. Name of Non-Working Antennas (with reason for each) :
C03 : Not releasing brakes.
E02 : Not releasing elevation brakes.
E03 : Frequently applying elevation brakes.

33. Note for Backup :

34. Start and End Time of Obs.(IST): 17 Feb 2017 20:00:00 - 18 Feb 2017 02:30:00

35. ONLINE Machine : Lenyadri

36. No of Antennas Working(Fringing) at the end :27

37. Comments (During Observations) :
Settings for observation 1 :

GSB Settings :
   RF Band     : 327 MHz
   LO(1)       : 510 MHz
   IF BW       : 18 MHz
   LO(5)       : 138.1 166.9 MHz
   LO(4)       : 61.9 61.9 MHz
   Baseband BW : 4.18 MHz
   Step        : 1
   Channels    : 512
   TPA 448.1 448.1 510 510 61.9 61.9
---------------------------------------------------------------------------
GWB settings : 
NARROW-BAND MODE
Line frequency: 419.2 MHz
GAB LO        : 500 MHz
Sideband flag : 1 (Flipped)
ACQ BW        : 100 MHz
DDC           :   1  (Narrow-band modes: ON)
Channels      : 4096
Stokes        : 2
Decimation factor: 32
Final BW         : 3.125 MHz
DDC LO           : 79.2 MHz
Channel 1        : 420.8 MHz
Channel 4096     : 417.675 MHz
---------------------------------------------------------------------------
19:40 : Started settings.
20:01 : '/odisk/gtac/cmd/nissim/j0934+3050.cmd' command file started.
21:53 : Stopped command file.
---------------------------------------------------------------------------
---------------------------------------------------------------------------
---------------------------------------------------------------------------
Settings for observation 2 :

GSB Settings :
    RF Band     : 327 MHz
    LO(1)       : 470 MHz
    IF BW       : 18 MHz
    LO(5)       : 137 168 MHz
    LO(4)       : 63 63 MHz
    Baseband BW : 2.08 MHz
    Step        : 3
    Channels    : 512
    TPA 407 407 470 470 63 63

21:55 : Started settings.
22:08 : '/odisk/gtac/cmd/nissim/j1125+3338.cmd' command file started.
00:19 : Stopped command file.
---------------------------------------------------------------------
Settings for observation 3 :
GSB set-up.
RF Band     : 327 MHz
    LO(1)       : 520 MHz
    IF BW       : 18 MHz
    LO(5)       : 139.4 165.6 MHz
    LO(4)       : 60.6 60.6 MHz
    Baseband BW : 2.08 MHz
    Step        : 3

    Channels    : 512
    lta         : 8m

TPA 459.4 459.4 520 520 60.6 60.6

00:27 : Started command file.
        /odisk/gtac/cmd/nissim/j1111+3252.cmd
02:30 : Stopped command file and observing session over.