GTAC Observation Log 1. Date : 14/12/2019 2. Observation Sr. No. : 11678 3. Observer : Pratik Dabhade, Mousumi Mahato, D.J. Saikia 4. Observer's Email : pratikdabhade13@gmail.com, mousumimahato187@gmail.com, dhrubasaikia@iucaa.in 5. Project Name : Estimating magnetic fields and spectral ages of giant radio galaxies 6. Project Code : 37_075 7. Operator(s) : Rupsing, Sachin 8. Command File : /odisk/gtac/cmd/37_075/14dec19/obs_0600.cmd,, /odisk/gtac/cmd/37_075/14dec19/obs_0600.cmd 9. LTA File : /gsbifrdata1/14dec/37_075_14dec2019_s5_gsb.lta, /gsbifrdata1/14dec/37_075_14dec2019_gsb.lta, /gwbifrdata/14dec/37_075_14dec2019_s5_gwb.lta, /gwbifrdata/14dec/37_075_14dec2019_gwb.lta 10. LogFlag File : /odisk/online1/logflags/37_075.FLAGS.3 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+12 dB, 32 MHz,ON, IF-CH2 : 4+12 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) : 1409 1409 1460 1460 51 51 30. Integration Time : 4.0265 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : C13 : Strong ripple @175(gwb+gsb). S01 : MCM 14 time out. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 14 Dec 2019 06:00:00 - 14 Dec 2019 12:03:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :25 37. RFI Status : 38. 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 : 37_075 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 : 4 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- 06:14 : Started scan on 3C286. 06:24 : Stopped scan. 06:30 : Started command file "/odisk/gtac/cmd/37_075/14dec19/obs_0600.cmd" 08:24 : W01 got ABC reset. 08:55 : Stopped command file after phase cal. 09:00 : Started scan on 3C286 in common with next observation set. 09:04 to 09:11 : W-arm antennas had electrical power failure. Restarted scan on 3C286 for next 8 mins. #NOTE : Ignore scan no. 10 in first file and 0 in second file as there was W-arm power failure. 09:11 : Started command file. 10:05 : C10 taken for maintenance work. 10:31 : C04 started giving intermittent brake problem in servo. 11:14 : S02 started giving stow lock problem. 11:44 : Closed command file and started scan on 1751-253 for ~ 6.17401 min. 11:55:39 : Started scan on 3C286. 12:02 : Closed observation session.