GTAC Observation Log 1. Date : 18/07/2010 2. Observation Sr. No. : 4969 3. Observer : Sandeep Sirothia 4. Observer's Email : sirothia@ncra.tifr.res.in,ishwar@ncra.tifr.res.in,ngk@ncra.tifr.res.in 5. Project Name : Extra Galactic Survey @ 150 MHz Using GMRT 6. Project Code : 18_031 7. Operator(s) : Deepak, Nilesh, Rupsingh, Santaji, 8. Command File : /odisk/gtac/cmd/sirothia/18_031_20100718a.cmd, /odisk/gtac/cmd/sirothia/18_031_20100718b.cmd 9. LTA File : /rawdata/18jul/18_031_18jul2010.lta, /rawdata1/18jul/18_031_18jul2010.ltb, 10. GSB File : /gsbifrdata/18jul/18_031_18jul2010_gsb.lta, 11. LogFlag File : /odisk/online1/logflags/18_031.FLAGS.71 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 : 4+12 dB, 16 MHz,ON, IF-CH2 : 4+12 dB, 16 MHz,ON 15. BB BW(KHz) & BB ALC : 16000 KHz, ON CORRELATOR SETTINGS : 16. Channels : 0:127:1 17. Frequency Parameters (TPA) : 156 156 218 218 62 62 18. Integration Time : 128 LTA ~ 16.908 Sec. 19. No of Antennas Working(Fringing) :29 20. Name of Non-Working Antennas (with reason for each) : E03 - Parked. E04 - Strong RFI lines. 21. Note for Backup :-- 22. Start and End Time of Obs.(IST): 17:30 - 07:00 23. ONLINE Machine : Shivneri 24. Correlator Mode : UsbPolar 25. Comments (During Observations) : 2s Data Files : /rawdata/18jul/18_031_18jul2010_2s.lta, /rawdata1/18jul/18_031_18jul2010_2s.ltb, /gsbifrdata1/18jul/18_031_18jul2010_gsb_2s.lta, ------------------------------------------------- GSB settings : Full Stokes ACQ BW : 16MHz. Final BW : OFF. 256 channels. ------------------------------------------------- 17:41 : Started scan on 3c286. 18:09 : Started command file. /odisk/gtac/cmd/sirothia/18_031_20100718a.cmd, 20:45 : Stopped command file. 20:47 : started next command file. /odisk/gtac/cmd/sirothia/18_031_20100718b.cmd, Note : 21:59:31 : Gateway machine gcc-l5 hung during observation run. Due to this communication to GSB was stopped. reboot to gcc-l5 solved problem. This leads missing of couple of scans on sources 2038+513 and R60D62 in gsb data file. 22:09 : communication to GSB started working. 06:19 : Stopped command file. 06:23 : Started scan on J0218+4232. 06:35 : Stopped scan. 06:37 : Started scan on 3C48. 07:00 : Stopped scan & observation closed. -------------------------------------------------