GTAC Observation Log 1. Date : 29/11/2010 2. Observation Sr. No. : 5123 3. Observer : Sandeep Sirothia, Ishwar Chandra 4. Observer's Email : sirothia@ncra.tifr.res.in,ishwar@ncra.tifr.res.in 5. Project Name : Extra Galactic Survey @ 150 MHz Using GMRT 6. Project Code : 19_043 7. Operator(s) : Deepak, Manisha, Nilesh, Rupsingh, 8. Command File : /odisk/gtac/cmd/sirothia/loop1.cmd, /odisk/gtac/cmd/sirothia/19_043_20101129a.cmd 9. LTA File : /rawdata/29nov/19_043_29nov2010.lta, /rawdata1/29nov/19_043_29nov2010.ltb 10. GSB File : /gsbifrdata/29nov/19_043_29nov2010_gsb.lta 11. LogFlag File : /odisk/online1/logflags/19_043.FLAGS.32 ANTENNA SETTINGS : 12. RF Freq(MHz) & Solar Attn(dB)- RF1 : 156 MHz ,RF2 : 156 MHz, SA1 : 14 dB, SA2 : 14 dB 13. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 218 MHz, ILO2 : 218 MHz, IVLO1 : 62 MHz, IVLO2 : 62 MHz 14. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 6+12 dB, 16 MHz,ON, IF-CH2 : 6+12 dB, 16 MHz,ON 15. BB BW(KHz) & BB ALC : 16000 KHz, ON CORRELATOR SETTINGS : GHB Settings : 16. GHB Channels : 128 17. Correlator Mode : UsbPolar 18. Frequency Parameters (TPA) : 156 156 218 218 62 62 GSB Settings : 19. Maximum Channels : 256 20. Final Bandwidth (MHz): OFF MHz; Step # 0 21. IFBW : LO5(MHz) : 16:138-167 MHz 22. Stokes : Full_Polar 23. Beam - 1 : OFF 24. Beam - 2 : OFF 25. Integration Time : 128 LTA ~ 16.908 Sec. 26. No of Antennas Working(Fringing) :27 27. Name of Non-Working Antennas (with reason for each) : W04 - low fringe in both GSB and GHB. S04 - fringe fluctuations in hardware correlator. C01 - Servo time out. C08 : Intermittent brakes in EL axis. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 17:00 - 07:20 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : * 2S data file * /rawdata/29nov/19_043_29nov2010_2s.lta, /rawdata1/29nov/19_043_29nov2010_2s.ltb, /gsbifrdata1/29nov/19_043_29nov2010_gsb_2s.lta ---------------------------------------------------- 17:02 : Started scan on 3C48. 17:24 : Stopped scan. 17:25 : Started scan on J0218+4232. 17:30 : C03 released for observation. 18:05 : Stopped scan. 18:06 : Started scan 3C48. 18:08 : C00 released for observation 18:22 : Stopped scan. 18:24 : Started command file '/odisk/gtac/cmd/sirothia/loop1.cmd, 19:00 : C01 started working. 20:48 : Stopped command file. 20:50 : Started command file /odisk/gtac/cmd/sirothia/19_043_20101129a.cmd 00:20 : C08 applying brakes intermittently. 06:47 : stopped command file. 06:52 : started scan on J0953+0755 ~ 15 mins. 07:10 : started scan on 3C147 ~ 10mins. 07:20 : stopped das & observation session. -------------------------- Note : Delay Jumps seen in (GSB) : C13-130,S01-130,S02-175,S03,S04,S06,W01-130,W05.