GTAC Observation Log 1. Date : 28/11/2017 2. Observation Sr. No. : 9911 3. Observer : Sravani Vaddi, Priya Hasan, Manash Ranjan Samal, David Principe, Syed Najamul Hasan 4. Observer's Email : sravani.vaddi@gmail.com, priya.hasan@gmail.com, manash.samal3@gmail.com, daveprincipe1@gmail.com, hasan.najam@gmail.com 5. Project Name : Tale of two populations - Understanding star formation in NGC 281 6. Project Code : 33_104 7. Operator(s) : Deepak, Nilesh, Shilpa 8. Command File : /odisk/gtac/cmd/33_104/28nov17/obs.cmd 9. LTA File : /gsbifrdata1/28nov/33_104_28nov2017.lta, /gwbifrdata1/28nov/33_104_28nov2017_gwb.lta.2, /gwbifrdata1/28nov/33_104_28nov2017_gwb.lta.1, /gwbifrdata1/28nov/33_104_28nov2017_gwb.lta 10. LogFlag File : /odisk/online1/logflags/33_104.FLAGS.2 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1409 MHz ,RF2 : 1409 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1460 MHz, ILO2 : 1460MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 32 MHz,ON, IF-CH2 : 4+14 dB, 32 MHz,ON GSB SETTINGS : 14. GSB Host : gsbm1_lenyadri 15. GSB Mode : Realtime 16. GSB LTA : 8 17. GSB CTRL : ONLINE 18. GSB Fstop : ON 19. GAIN EQ : ON 20. Stokes : Total_Intensity 21. Beam - 1 : OFF 22. Beam - 2 : OFF 23. ACQ BW : 33.333333 MHz 24. Final BW : 0 MHz; Step # 0 25. Maximum Channels : 512 26. Channel Numbers : 0:511:1 27. LO5 -1 : 149 28. LO5 -2 : 156 29. Frequency Parameters (TPA) : 1409 1409 1460 1460 51 51 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : C02 : No fringe. W01 : Very low fringe. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 28 Nov 2017 18:00:00 - 29 Nov 2017 23:00:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :30 37. Comments (During Observations) : ------------GWB Setting---------------------------------------------------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 400.0000 GPU_FINAL_BW : 400.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 33_104 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : IA GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 128 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : For 32 inputs GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF --------------------------------------------------------------------------- 18:00 : Started settings. 18:04 : Started scan on 3C48. GSB fringing properly, but frequently fringe vanished for GWB. After clearing some processes, GWB fringing properly @ 18:25Hrs. 18:28 : Started scan on 3C48 at GWB and GSB for 12min. 18:43 : '/odisk/gtac/cmd/33_104/28nov17/obs.cmd' command file started. 19:35 : Satellite observed. 20:30 : Stopped command file. 20:31 : Started scan on 3C147 for ~ 10.0663 min. 20:44 : Restarted command file. 20:44 : C02 and W01 started working. 22:41 : Stopped command file. 22:43 : Started scan on 3C48. 23:00 : Stopped scan and observing session over.