GTAC Observation Log 

1. Date : 14/7/2011
2. Observation Sr. No. : 5445
3. Observer : Sowgat Muzahid,Neeraj Gupta,Srianand
4. Observer's Email : sowgat@iucaa.ernet.in,anand@iucaa.ernet.in,nrjgupta@gmail.com
5. Project Name : Understanding the nature of 21-cm absorbers through observations of quasar and radio source-galaxy pairs at z < 0.1
6. Project Code : 20_037
7. Operator(s) : Navanath,
	Nilesh,
	
8. Command File : /odisk/gtac/cmd/neeraj/14jul2011/j1156.cmd,
	/odisk/gtac/cmd/neeraj/14jul2011/j1639.cmd
9. LTA File : /gsbifrdata/14jul/20_037_14jul2011.lta,
	/gsbifrdata/14jul/20_037_14jul2011.lta.1,
	
10. LogFlag File : /odisk/online1/logflags/20_037.FLAGS,
	/odisk/online1/logflags/20_037.FLAGS.1,
	/odisk/online1/logflags/20_037.FLAGS.2,
	/odisk/online1/logflags/20_037.FLAGS.4,
	

ANTENNA SETTINGS :

11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1237.3 MHz ,RF2 : 1237.3 MHz, SA1 : 0 dB, SA2 : 0 dB
12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1175 MHz, ILO2 : 1175 MHz , IVLO1 : 62.3 MHz, IVLO2 : 62.3 MHz 
13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 10+12 dB, 16 MHz,ON, IF-CH2 : 10+12 dB, 16 MHz,ON

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 : 16 MHz
21. Maximum Channels : 512 
22. IFBW (MHz) : LO5 (KHz) : Custom :- 16 : 137.7 - 167.3
23. Final Bandwidth (MHz): 4 MHz; Step # 2

24. Frequency Parameters (TPA) : 1237.3 1237.3 1175 1175 62.3 62.3.
25. Integration Time : 16.106 Sec.
26. No of Antennas Working(Fringing) :26

27. Name of Non-Working Antennas (with reason for each) :
C09,E02 : Maintenance.
W03 : No Fringe.
W04 : Servo problem.
28. Note for Backup :--

29. Start and End Time of Obs.(IST): 17:00 - 03:30

30. ONLINE Machine : Shivneri

31. Comments (During Observations) :
--------------------------------------------------
17:00 : Started settings.
       Line Freq = 1247.83,
       RF Freq = 1237.3 MHz, LO1 = 1175MHz, LO4 = 62.3MHz
       LO5 = 137.7-167.3, IFBW = 16MHz, 
       FinalBW = 4MHz. Sub-band step = 2
17:34 : Started scan on 3c286 ~16min.
17:40 : Started command file.
'/odisk/gtac/cmd/neeraj/14jul2011/j1156.cmd'.
20:18 : S03 ABC time out.
21:41 : Stopped command file.
21:45 : Started scan on 3c286 for ~15min.
--------------------------------------------------
22:00 : Changed Frequency settings.
       Line Freq = 1316.25,
       RF Freq = 1311 MHz, LO1 = 1245MHz, LO4 = 66MHz
       LO5 = 134-171, IFBW = 6MHz, 
       FinalBW = 2MHz. Sub-band step = 2
22:23 : Started scan on 3c286.
        Non-working antennas : C01,C09,E02,S03,W04.
22:42 : Started command file.

'/odisk/gtac/cmd/neeraj/14jul2011/j1639.cmd'.

03:07: Started scan on 3C48 for 20mn.
03L30 : Observing session over.