GTAC Observation Log 1. Date : 13/02/2009 2. Observation Sr. No. : 4198 3. Observer : Jayaram Chengalur 4. Observer's Email : chengalu@ncra.tifr.res.in 5. Project Name : ggdp 6. Project Code : 15PLA01 7. Operator(s) : Deepak, Jayprakash, Manisha, Navanath, Rupsingh, Sachin, Shilpa 8. Command File : /odisk/gtac/cmd/philiplah/vvds14.cmd, /odisk/gtac/cmd/philiplah/cl0024.cmd 9. LTA File : /rawdata/13feb/15pla01_13feb2009.lta, /rawdata/13feb/15pla01_13feb2009_diffstop.lta, /rawdata1/13feb/15pla01_13feb2009.ltb, /rawdata1/13feb/15pla01_13feb2009_diffstop.ltb 10. LogFlag File : /btemp2/logflags/15PLA01.FLAGS.13 ANTENNA SETTINGS : 11. RF Freq(MHz) & Solar Attn(dB)- RF1 : 1076 MHz ,RF2 : 1076 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 1145 MHz, ILO2 : 1145 MHz, IVLO1 : 69 MHz, IVLO2 : 69 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 32 MHz,ON, IF-CH2 : 4+12 dB, 32 MHz,ON 14. BB BW(KHz) & BB ALC : 16000 KHz, ON CORRELATOR SETTINGS : 16. Channels : 0:127:1 17. Frequency Parameters (TPA) : 1076 1076 1145 1145 69 69 18. Integration Time : 128 LTA ~ 16.908 Sec. 19. No of Antennas Working(Fringing) :28 20. Name of Non-Working Antennas (with reason for each) : W04 : Low fringe (bad bandshape). E02 : No fringe in LSB 175pol. S04 X C00-C12 - LSB : high cross counts. 21. Note for Backup : -- 22. Start and End Time of Obs.(IST): 03:00 - 03:00 23. ONLINE Machine : Bhaskar 24. Correlator Mode : IndianPolar 25. Comments (During Observations) : -------------------------------------------- NOTE FOR THE USER : "The online fringe stopping algorithm was found to be in error by about 2s after 1Jan2009. This differential fringe rate was applied using the program diffstop. The fringe rate was corrected for an error of +2.0s, and the timestamps were also updated by the same amount." --------------------------------------------- 03:00 : Started setting. 03:20 : Started scan on 3C286. 03:31 : Stopped scan. 03:43 : '/odisk/gtac/cmd/philiplah/vvds14.cmd' command file started. 08:10 : w01 taken for painting. 09:00 : C14 taken for painting. 09:47 : command file stopped. 09:55 : started scan on 2130+050 ~ 10 mins. 10:08 : stopped scan. 10:10 : setting changed to ILO : 1095 MHz & IVLO : 71 MHz. TPA 1024 1095 71. 10:12 : started scan on 2130+050 ~ 10mins. 10:24 : command file cl0024.cmd started. 13:00 : W01 relesed for observation. 13:47 : command file stopped. 13:49 : Started scan on phase cal. 13:58 : scan stopped. 14:01 : Started scan on 3c48 for 10min. 14:10 : Scan stopped. setting change: tpa 1040 1040 1110 1110 70 70 14:11 : Started scan on 3c48 for 10min. 14:23 : Started commnad file /odisk/gtac/cmd/philiplah/a370.cmd 15:30 : S06 ABC reset. 15:40 : S06 mcm 2,3&10 timeout. 18:45 : C14 included in observation. 20:15 : Command file stopped. 20:16 : Started scan on 0323+055 for 5mins 20:26 : started scan on 3C48 for 10mins. 20:45 : Started command file. /odisk/gtac/cmd/philiplah/zcosmos.cmd 02:27 : Stopped command file. 02:28 : Started scan on phase cal for 8 mins. 02:45 : Started scan on 3C286 for 15 mins. 03:00 : Stopped scan on 3C286 and stopped observation session.