GTAC Observation Log 1. Date : 30/10/2020 2. Observation Sr. No. : 12521 3. Observer : Jayanta Roy, Bhaswati Bhattacharyya, Lina Levin, Ben Stappers, Paul Ray, Shyam Sunder 4. Observer\'s Email : jroy@ncra.tifr.res.in, bhaswati.bhattacharyya78@gmail.com, lina.s.levin@gmail.com, Ben.Stappers@manchester.ac.uk, paul.ray@nrl.navy.mil, ssunder@ncra.tifr.res.in 5. Project Name : Multi-frequency timing of millisecond pulsars with the GMRT 6. Project Code : 39_060 7. Operator(s) : Navnath, Nilesh 8. Command File : /odisk/gtac/cmd 9. LTA File : /gsbifrdata/30oct/39_060_30oct2020_band5_gsb.lta, /gwbifrdata/30oct/39_060_30oct2020_band5_gwb.lta 10. LogFlag File : 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_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 : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :20 32. Name of Non-Working Antennas (with reason for each) : C03 : : Mechanical Work. C08 : : 1420 Mhz Full RF setting problem./ all mcm time out in online. C14 : : RF Stetting problem .. C14 - mcm 14 time out. W01 : : MCM 5 continuous on. W02 : : 1060 sub band getting set. W03 : : feed jam. W05 : : Feed jam. C13 : : Low fringe. S02 : : Low fringe S04 : : Low fringe. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 30 Oct 2020 19:00:00 - 30 Oct 2020 21:00:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :20 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 : 4096 GPU_CHAN_NUM : 0:4095:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 39_060 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : OFF GPU_BEAM_2 : OFF GPU_BEAM_3 : PA GPU_BEAM_4 : OFF GPU_BM_INT : 8 GPU_GAINEQ : ON GPU_TPA : From online tpa GPU_BITS : 4 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 -------------------------------- 18:00 : Started feed rotation @ band 5. 18:20 : feed rotation done. Feed : 26 rotated. problem : 4, C03,C14 and W05,W03 18:31 : Started pntg cmd file both axis using only GSB backend. 19:25 : pntg done. 19:27 : Started setup for 39_060. 19:35 : Started corr chain. 19:45 : Started power eq. Strong Satellite RFI in band5. 19:55 : source changed due to RFI. 20:07:29 : Started scan on 1822-096 for ~ 4.16075 min. : source showing very weak fringes. 20:12:00 : moving to 3C48. C03 : : Mechanical Work. C08 : : 1420 Mhz Full RF setting problem./ all mcm time out in online. C14 : : RF Stetting problem .. C14 - mcm 14 time out. W01 : : MCM 5 continuous on. W02 : : 1060 sub band getting set. W03 : : feed jam. W05 : : Feed jam. C13 : : Low fringe. S02 : : Low fringe S04 : : Low fringe. 20:21:19 : Started scan on 3C48 for ~ 41.8759 min. only 20 Ants fringing showing good fringe in both GSB and GWB. Tried settings for following antennas via ONLINE : C08,C14,W02,W03,W05,S02,S04 : setting done throgh ONLINE Still No fringe for above antennas 21:10 : TGC test pulsar command file run, but failed to add user catalog and use source catalogs command file exited abnormally. 21:44:09 : Started scan on 3C48 for ~ 0.268435 min. 21:44:52 : Started scan on 3C48 for ~ 1.2527 min. 21:49:23 : Started scan on 3C48 for ~ 5.27923 min. 22:00:00 : corr stopped : GTAC Observation Could not Complete due to various problems. a. Strong RFI b. add catlog problem through cmd file. c. less ant counts. d. RF setting problem C08,C14,W02. e. FPS problems. 26 atns rotated after some work around.