GTAC Observation Log 1. Date : 25/07/2020 2. Observation Sr. No. : 12223 3. Observer : Surajit Mondal, Apurba Bera, Prasun Dutta 4. Observer\'s Email : surajit@ncra.tifr.res.in, apurba@ncra.tifr.res.in, pdutta.phy@itbhu.ac.in 5. Project Name : Detecting carbon recombination lines from M82 6. Project Code : 38_105 7. Operator(s) : Shriram 8. Command File : /odisk/gtac/cmd/38_105/38_105_1.cmd, /odisk/gtac/cmd/38_105/38_105_2.cmd 9. LTA File : /gsbifrdata/25jul/38_105_25jul2020_gsb.lta, /gwbifrdata2/25jul/38_105_25jul2020_gwb.lta 10. LogFlag File : /odisk/online1/logflags/38_105.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 296 MHz ,RF2 : 296 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 245 MHz, ILO2 : 245MHz , 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_shivneri 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 : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 149 28. LO5 -2 : 156 29. Frequency Parameters (TPA) : 296 296 245 245 51 51 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :25 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work S06 : No fringe in GWB S02 : Feed jammed W05 : No fringe at 175 pol in GSB. C09 : low fringe at 175 pol. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 25 Jul 2020 09:00:00 - 25 Jul 2020 14:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :24 37. RFI Status : 38. Comments (During Observations) : Scan 6 and scan 7- Bad scan ------------GWB Setting------------------------------------------------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 100.0000 GPU_FINAL_BW : 100.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 8192 GPU_CHAN_NUM : 0:8191:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 340 340 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 38_105 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : OFF 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 : 8 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------------------------------------------------- 08:45 : Started settings. 09:08 : Started scan on 3C147~10min. 09:19 : Started command file \'odisk/gtac/cmd/38_105/38_105_1.cmd, -------------------------------------------------------------------------- 10:30 : East arm power failure. C04, E02, W05, S04, S06 power failure. mcm got timeout 10:40 : South arm Power failure. -------------------------------------------------------------------------- 10:55 : command file stopped -------------------------------------------------------------------------- 11:00 : C04, E02, W05, S04, S06. mcm got timeout. 11:26 : C04 got reset. 11:40 : Antannae recovered. E04 : Constantly applying brakes. -------------------------------------------------------------------------- 11:40 : started command file, \'odisk/gtac/cmd/38_105/38_105_2.cmd 13:42 : Stopped command file. 13:45 : Started scan on 3C147. 14:00 : Scan stopped and observation session over. --------------------------------------------------------------------------