GTAC Observation Log 1. Date : 18/03/2009 2. Observation Sr. No. : 4254 3. Observer : Dwarakanath K. S. 4. Observer's Email : dwaraka@rri.res.in,ruta@rri.res.in 5. Project Name : RADIO HALO 6. Project Code : 09DT007 7. Operator(s) : Nilesh, Rupsingh, Santaji, Shilpa 8. Command File : /odisk/gtac/cmd/ishwar/ddt_dwaraka.cmd 9. LTA File : /rawdata/18mar/09dt007_18mar2009.lta, /rawdata1/18mar/09dt007_18mar2009.ltb, /rawdata/18mar/09dt007_18mar2009_diffstop.lta, /rawdata1/18mar/09dt007_18mar2009_diffstop.ltb 10. LogFlag File : /btemp2/logflags/09DT007.FLAGS.1 ANTENNA SETTINGS : 11. RF Freq(MHz) & Solar Attn(dB)- RF1 : 325 MHz ,RF2 : 325 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz) : ILO1 : 255 MHz, ILO2 : 255 MHz, IVLO1 : 70 MHz, IVLO2 : 70 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) : 325 325 255 255 70 70 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) : W01 : lo1 unlock. 21. Note for Backup : -- 22. Start and End Time of Obs.(IST): 19:42 - 05:55 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." --------------------------------------------------- 19:42 : Scan started on 3C147. 21:08 : Command file started. 05:30 : S06 servo problem. 05:37 : Stopped command file. 05:39 : Started scan on 3C286. 05:55 : Stopped scan and observing session over.