GTAC Observation Log 1. Date : 31/01/2010 2. Observation Sr. No. : 4746 3. Observer : Yogesh Chandola 4. Observer's Email : chandola@ncra.tifr.res.in 5. Project Name : B1845+797 6. Project Code : 17_057 7. Operator(s) : Jayprakash, Rupsingh, Shilpa 8. Command File : /odisk/gtac/cmd/yogesh/17_057/1845.cmd 9. LTA File : /rawdata/31jan/17_057_31jan2010.lta, /rawdata1/31jan/17_057_31jan2010.ltb 10. LogFlag File : /odisk/online1/logflags/17_057.FLAGS.6 ANTENNA SETTINGS : 11. RF Freq(MHz) & Solar Attn(dB)- RF1 : 1343.7183 MHz ,RF2 : 1343.7183 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 1275 MHz, ILO2 : 1275 MHz, IVLO1 : 68.7183 MHz, IVLO2 : 68.7183 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 16 MHz,ON, IF-CH2 : 4+12 dB, 16 MHz,ON 14. BB BW(KHz) & BB ALC : 4000 KHz, ON CORRELATOR SETTINGS : 16. Channels : 0:127:1 17. Frequency Parameters (TPA) : 1343.7183 1343.7183 1275 1275 68.7183 68.7183 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) : C11 - servo problem. C13 - feed jam. C03 - fringe fluctuations(only in hardware correlator) S01 - @175 pole low fringe 21. Note for Backup : -- 22. Start and End Time of Obs.(IST): 06:00 - 14:35 23. ONLINE Machine : Lenyadri 24. Correlator Mode : IndianPolar 25. Comments (During Observations) : GSB data file: /gsbifrdata/31jan/17_057_31jan2010_gsb.lta --------------------------------------------------- 06:00 : Started settings. 06:18 : Started scan on 3C286. 06:34 : Stopped scan. 06:41 : '/odisk/gtac/cmd/yogesh/17_057/1845.cmd' command file started. 07:44 : Stopped command file for the phase cal chanege. 07:48 : Restarted command file. 08:58 : Stopped command file. 09:02 : Started scan on 3C286 for 15min. 09:17 : Stopped scan. 09:21 : Restarted command file. 09:56 : C13 started working. 10:13 : C11 started working. 11:18 : S06 taken for maintenance. 12:38 : Stopped command file. 12:46 : Started scan on 3C48. 13:01 : Stopped scan. 13:05 : Restarted command file. 14:15 : Stopped command file. 14:19 : Started scan 3C48. 14:35 : Stopped scan and observation closed.