GTAC Observation Log 

1. Date : 28/2/2013
2. Observation Sr. No. : 6400
3. Observer : Sandip Sirothia, Ishwar Chandra
4. Observer's Email : sirothia@ncra.tifr.res.in
5. Project Name : GMRT P-band deep survey of the HERSCHEL/HerMES Lockman SWIRE field
6. Project Code : 23_001
7. Operator(s) : Navanath,
	Nilesh,
	Rupsingh,
	Surender
8. Command File : /odisk/gtac/cmd/sirothia/23_001_20130215.cmd,
	
9. LTA File : /gsbifrdata/28feb/23_001_28feb2013_16s.lta,
	/gsbifrdata/28feb/23_001_28feb2013_16s.lta.1,
	
10. LogFlag File : /odisk/online1/logflags/23_001.FLAGS.2,
	/odisk/online1/logflags/23_001.FLAGS.3,
	

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 : 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. GAIN EQ : ON 
17. Stokes : Full_Polar
18. Beam - 1 : OFF
19. Beam - 2 : OFF
20. ACQ BW : 32 MHz
21. Maximum Channels : 256 
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) :28

27. Name of Non-Working Antennas (with reason for each) :
C04 : Servo motor changing and counter weight rectification.
W02 : BLDC work.
28. Note for Backup :--

29. Start and End Time of Obs.(IST): 18:00 - 08:12

30. ONLINE Machine : Lenyadri

31. Comments (During Observations) :
2s data files on gsbm4 :
/gsbifrdata1/28feb/23_001_28feb2013_2s.lta
/gsbifrdata1/28feb/23_001_28feb2013_2s.lta.1
---------------------------------------------------------------------

18:15 : Started setup.
18:30 : Started scan on 3C48 for 15 min.
19:08 : Started command file.

01:16 : lost communication with GSB cluster. 
        astro8, gsbm1, gsbm4, and other cluster nodes communication stopped working.
01:22 : communication to GSB cluster started on its own,
        but not accepting command from online machine.

01:36 : STOPPED all GSB processes manually and tried to restart data acquisition chain.
01:48 : Again similar problem observed.
        astro8, gsbm1, gsbm4, and other cluster nodes communication stopped working.
        at arround 02:00 IST communication to GSB cluster started on its own.

02:05 : Restarted GSB data acq chain.
01:11 : Started command file.

06:26 : Sources set, taken data manually on following sources :
06:31:13 : Started scan on LH02D06 for ~ 5.63714 min.
06:38:40 : Started scan on LH02D07 for ~ 5.63714 min.
06:45:52 : Started scan on 3C286 for ~ 0.53687 min.
06:48:42 : Started scan on 3C286.

08:12 : Stopped scan and closed observation session.