GTAC Observation Log 1. Date : 21/12/2020 2. Observation Sr. No. : 12707 3. Observer : Mousumi Mahato, Pratik Dabhade, D.J. Saikia 4. Observer\'s Email : mousumimahato187@gmail.com, pratikdabhade13@gmail.com, dhrubasaikia@iucaa.in 5. Project Name : Studying giant double-double radio galaxies (DDRGs) from LoTSS 6. Project Code : 39_069 7. Operator(s) : Nilesh, Pramod 8. Command File : /odisk/gtac/cmd/39_069/21dec20.cmd 9. LTA File : /gsbifrdata/21dec/39_069_21dec2020_gsb.lta, /gsbifrdata/21dec/39_069_21dec2020_gsb.lta, /gwbifrdata1/21dec/39_069_21dec2020_gwb.lta, /gwbifrdata1/21dec/39_069_21dec2020_gwb.lta 10. LogFlag File : /odisk/online1/logflags/39_069.FLAGS.2, /odisk/online1/logflags/39_061.FLAGS.9 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 591 MHz ,RF2 : 591 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540MHz , 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) : 591 591 540 540 51 51 30. Integration Time : 8.053 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 21 Dec 2020 06:00:00 - 21 Dec 2020 12:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :27 37. RFI Status : 38. Comments (During Observations) : ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 200.0000 GPU_FINAL_BW : 200.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 8192 GPU_CHAN_NUM : 0:8191:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 550 550 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 39_069 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 : 4 GPU_GAINEQ : ON GPU_TPA : From GWB GUI. GPU_BITS : 8 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF GPU_PFB : OFF GPU_PFB_TAPS : 16 GPU_BEAM_BIT : 16 GPU_VLT_BIT : 8 GPU_ENV : RELEASED -------------------------------- 06:00 : Started set up. 06:13 : Started scan on 3C286. 06:23 : Stopped scan and started command file. /odisk/gtac/cmd/39_069/21dec20.cmd 07:39 : E06 servo problem. 07:49 : C05 ABC time out. 08:14 : C05 Initialized after ABC reset but servo problem occurred. 11:00 : S03 taken for maintenance. 11:38 : Stopped command file. 11:41 : Started scan on 3C286 ~ 15 min. 12:00 : Stopped scan and observation over.