Gtac Observation Log 1. Date : 24/02/2011 2. Observation Sr. No. : 5259 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 @ 150MHz using GMRT 6. Project Code : 19_043 7. Operator(s) : Deepak, Navanath, Nilesh, Sachin, Shilpa 8. Command File : /odisk/gtac/cmd/sirothia/19_043_20110224a.loop1to2.cmd, /odisk/gtac/cmd/sirothia/19_043_20110224a.loop3to5.cmd 9. LTA File : /rawdata/24feb/19_043_24feb2011.lta, /rawdata1/24feb/19_043_24feb2011.ltb, 10. GSB File : /gsbifrdata/24feb/19_043_24feb2011_gsb.lta, 11. LogFlag File : /odisk/online1/logflags/19_043.FLAGS.74 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 : 8+12 dB, 16 MHz,ON, IF-CH2 : 8+12 dB, 16 MHz,ON 15. BB BW(KHz) & BB ALC : 16000 KHz, ON CORRELATOR SETTINGS : GHB Settings : 16. GHB Channels : 0:127:1 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 (MHz) : LO5 (KHz) : 16:138000-167000 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) : C04 : BLDC(servo). C03,E04 : Servo oscillations (Az axis). C06,C12,E02,W06 fringe fluctuation in GHB. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 17:00 - 08:02 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : 2s data files : /rawdata/24feb/19_043_24feb2011_2s.lta, /rawdata1/24feb/19_043_24feb2011_2s.ltb, /gsbifrdata1/24feb/19_043_24feb2011_gsb_2s.lta, ----------------------------------------------------------------------------------------------------- 17:00 : Started settings for observation. 17:32 : Started scan on 3C48. 17:55 : Stopped scan. 17:56 : Started scan on J0218+4232. 18:15 : Stopped scan. 18:18 : Started command file. /odisk/gtac/cmd/sirothia/19_043_20110224a.loop1to2.cmd, 22:55 : Started next command file. /odisk/gtac/cmd/sirothia/19_043_20110224a.loop3to5.cmd, 05:30 : Stopped command file. 05:35 : Started command file for sixth loop. 10 srcs was setting and hence removed from command file. 07:10 : Stopped command file. 07:13 : Started scan on 3C286. 08:02 : Stopped scan and observing session over.