GTAC Observation Log 1. Date : 30/11/2010 2. Observation Sr. No. : 5124 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) : Manisha, Nilesh, Rupsingh, Sachin, 8. Command File : /odisk/gtac/cmd/sirothia/loop1.cmd, /odisk/gtac/cmd/sirothia/19_043_20101130a.cmd 9. LTA File : /rawdata/30nov/19_043_30nov2010.lta, /rawdata1/30nov/19_043_30nov2010.ltb 10. GSB File : /gsbifrdata/30nov/19_043_30nov2010_gsb.lta.3 11. LogFlag File : /odisk/online1/logflags/19_043.FLAGS.33 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) :26 27. Name of Non-Working Antennas (with reason for each) : W04 - low fringe in both GSB and GHB. S04 - fringe fluctuations in hardware correlator. C08 - Servo problem E03 - No fringe. 28. Note for Backup :-- 29. Start and End Time of Obs.(IST): 17:30 - 07:00 30. ONLINE Machine : Lenyadri 31. Comments (During Observations) : * 2S data file * /rawdata/30nov/19_043_30nov2010_2s.lta, /rawdata1/30nov/19_043_30nov2010_2s.ltb, /gsbifrdata/30nov/19_043_30nov2010_gsb_2s.lta.1 ---------------------------------------------------- 17:41 : Started scan on 3C48. 17:47 : GSB not working(buffer loss). 17:46 : C03 released for observation. 17:49 : C00 released for observation. 18:14 : Stopped scan. 18:16 : Started scan on J0218+4232. 18:18 : C03 released for observation. 18:05 : Stopped scan. 18:17 : GSB started working. 18:19 : Started scan 3C48. 18:26 : Stopped scan. 18:29 : Started command file '/odisk/gtac/cmd/sirothia/loop1.cmd, 20:52 : Stopped command file. 20:54 : Started command file /odisk/gtac/cmd/sirothia/19_043_20101130a.cmd 07:15 : command file stooped. 07:21 : started scan on J0953+0755 ~ 15mins. 07:36 : stopped scan & observation session. ------------------------------------ Note : Delay jumps are seen in following antennas USB : S03,S04,W06, LSB : E03,S04,W06, GSB : S01,S04-175,E04,E05,E06,W02,W03,W04,W05. ------------------------------------------------