GTAC Observation Log 

1. Date : 29/06/2010
2. Observation Sr. No. : 4936
3. Observer : Neeraj Gupta
4. Observer's Email : nrjgupta@gmail.com
5. Project Name : Probing the time variation of fundamental constants using newly discovered 21cm absorbers at z ~ 1.3
6. Project Code : 18_044
7. Operator(s) : Amruta,
	Navanath,
	Nilesh,
	Rupsingh,
	Santaji,
	
8. Command File : /odisk/gtac/cmd/neeraj/mg1623.cmd,
	/odisk/gtac/cmd/neeraj/mg2358.cmd
9. LTA File : /rawdata/29jun/18_044_29jun2010.lta,
	/rawdata1/29jun/18_044_29jun2010.ltb,
	/rawdata/29jun/18_044_29jun2010.lta.1,
	/rawdata1/29jun/18_044_29jun2010.ltb.1
10. GSB File : /gsbifrdata/29jun/18_044_29jun2010_gsb.lta,
	/gsbifrdata/29jun/18_044_29jun2010_gsb.lta
11. LogFlag File : /odisk/online1/logflags/18_044.FLAGS.5,
	/odisk/online1/logflags/18_044.FLAGS.6

ANTENNA SETTINGS :

12. RF Freq(MHz) & Solar Attn(dB)- RF1 : 607.8335 MHz ,RF2 : 607.8335 MHz, SA1 : 0 dB, SA2 : 0 dB
13. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 540 MHz, ILO2 : 540 MHz, IVLO1 : 67.8335 MHz, IVLO2 : 67.8335 MHz
14. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 6 MHz,ON, IF-CH2 : 4+12 dB, 6 MHz,ON
15. BB BW(KHz) & BB ALC : 500 KHz, ON

CORRELATOR SETTINGS :

16. Channels : 0:127:1
17. Frequency Parameters (TPA) : 607.8335 607.8335 540 540 67.8335 67.8335 

18. Integration Time : 128 LTA ~ 16.908 Sec.
19. No of Antennas Working(Fringing) :27

20. Name of Non-Working Antennas (with reason for each) :
C04,C10,E04 : Phase jump in GHB
C05 : phase jumps (GHB+GSB)
C11 : freq. applying brakes.
S01 : No fringe.

21. Note for Backup :--

22. Start and End Time of Obs.(IST): 18:00 - 10:00

23. ONLINE Machine : Shivneri

24. Correlator Mode : IndianPolar

25. Comments (During Observations) :
----------------------------------------------------
# GSB settings:
Realtime; TotalIntensity;
ACQ band width 16 MHz;512 channels.
Final BW = 2MHz; Edge Step = 0;
----------------------------------------------------
18:00 : Started settings for 18_039 project.
18:19 : Started scan on 3c286 for ~20min.
18:45 : Started command file.
        '/odisk/gtac/cmd/neeraj/mg1623.cmd'.
21:47 : Stopped command file.
21:55 : started scan on 3C286.
22:13 : Stopped scan.
22:22 : Restarted command file.
23:22 : E05 applied Az brakes.
00:27 : scan started on 3c286.
00:41 : restarted the command file.
02:18 : stopped the command file and changed the setup.
--------------------------------------------------------
tpa 653.5860 585 68.5860
BB 0.25 MHz.
Indain Polar mode.
GSB : 512 chan, Lo5 133,172 (if 6)
step # 6, ACQ BW 16, FBW 0.25 MHz.
New record files started.
C13,C04,C05 shows phase jumps(GHB+GSB).
C11,E05, servo problems.
S01 - no fringe.
---------------------------------------------------
02:30 : scan started on 3c48.
02:48 : command file started.
05:47 : scan started on 3c48.
06:10 : restarted the command file.
10:27 : Started scan on 3c147.
10:42 : Stopped scan and observation session.

----------------------------------------------------