GTAC Observation Log 1. Date : 18/05/2020 2. Observation Sr. No. : 12012 3. Observer : James McKee, BHAL CHANDRA JOSHI 4. Observer\'s Email : jamesmckee23@gmail.com, bcj@ncra.tifr.res.in 5. Project Name : Broadband Observations of Giant Pulses from the Millisecond Pulsars B1937\\\\+21 and B1957\\\\+20 6. Project Code : 37_004 7. Operator(s) : Nilesh, Pramod 8. Command File : /odisk/gtac/cmd/bcj/37_004_09mar2020.cmd 9. LTA File : /gsbifrdata1/18may/37_004B_band3_18may2020_gsb.lta, /gsbifrdata1/18may/37_004A_band4_18may2020_gsb.lta, /gwbifrdata1/18may/37_004B_band3_18may2020_gwb.lta.2, /gwbifrdata1/18may/37_004B_band3_18may2020_gwb.lta.1, /gwbifrdata1/18may/37_004B_band3_18may2020_gwb.lta, /gwbifrdata1/18may/37_004A_band4_18may2020_gwb.lta.2, /gwbifrdata1/18may/37_004A_band4_18may2020_gwb.lta.1, /gwbifrdata1/18may/37_004A_band4_18may2020_gwb.lta 10. LogFlag File : ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 612 MHz ,RF2 : 612 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 550 MHz, ILO2 : 550MHz , IVLO1 : 62 MHz, IVLO2 : 62 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 16+10 dB, 16 MHz,OFF, IF-CH2 : 16+10 dB, 16 MHz,OFF 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 : OFF 20. Stokes : Total_Intensity 21. Beam - 1 : OFF 22. Beam - 2 : Volt 23. ACQ BW : 16.666666 MHz 24. Final BW : 0 MHz; Step # 0 25. Maximum Channels : 256 26. Channel Numbers : 0:255:1 27. LO5 -1 : 138 28. LO5 -2 : 167 29. Frequency Parameters (TPA) : 612 612 550 550 62 62 30. Integration Time : 4.0265 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : C03 : : Mechanical work. C11 : : FPS problem. W04 : : ABC time out. W05 : : FPS problem. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 18 May 2020 05:25:00 - 18 May 2020 08:22:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :26 37. RFI Status : 38. Comments (During Observations) : 05:30 : Started settings. ------------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 : 1024 GPU_CHAN_NUM : 0:1023:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF3 : 500 500 GPU_DDCLO3 : 0.0000 0.0000 GPU_SB3 : 1 1 GCODE3 : 37_004B GPU_RF4 : 550 550 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 37_004A GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : Voltage GPU_BEAM_2 : Voltage 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 -------------------------------- GSB Settings Radio Frequency Band : 610 Observation Type : Pulsar RF : 610 MHz, RF ON, NG OFF, SA OFF IF : 16 MHz, ALC Off, default atten @ 610 BB : 16 MHz, ALC Off Ist LO : 550 4th LO : 62 corr mode : Voltage PA beam mode 16 MHz 256 channel tpa Default for 610 MHz : 550 550 612 612 62 62 RF Frequency (ch1-ch512) : 612.0 - 628.0 MHz Beam Mode (Pulsar) : OFFPA Integration Time : 30 ns Correlator Mode : PA Voltage beam mode 16 MHz 256 channels Channel nos : 256 Band Width : 16 MHz Data Volume : 1.8 GB/min * 120 = 223 GB (60 GB per disk) ================================================== GWB Settings MODE : REALTIME LTA : 4 (2.5 sec) ACQ BW : 100 MHz NO OF CHAN : 1024 STOKES : 2 Total Intensity TPA SELECTION : MANUAL GAIN : ON FSTOP : ON BITS : 8 DDC : 0 (Narrow band mode OFF) Subarr 4 GWB Beam1 : Voltage PA beam CD pipeline GSB Beam2 : PA Voltage beam mode 16 MHz 256 channels GAC Config : C00 C08 C10 C11 C13 W02 E03 S01 S02 Ref : C00 = 9 BAND : BAND 4 (550 - 850) SUBBAND FILTER : Full BAND. Subarr 3 Beam2 : Voltage PA beam CD pipeline GAC Config : C01 C02 C04 C05 C06 C09 C12 W01 E02 Ref : C09 = 9 BAND : BAND 3 (250-500) SUBBAND FILTER : Used 400-500(with LSB) instead off 300-400. :::::::::::::: gwb_gac.dat :::::::::::::: # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C08 C10 C13 C14 E03 S01 S02 W02 Total=9 # BEAM-1:175 :: C00 C08 C10 C13 C14 E03 S01 S02 W02 Total=9 # BEAM-2:130 :: C01 C02 C04 C05 C06 C09 C12 E02 W01 Total=9 # BEAM-2:175 :: C01 C02 C04 C05 C06 C09 C12 E02 W01 Total=9 # BEAM-3:130 :: Total=0 # BEAM-3:175 :: Total=0 # BEAM-4:130 :: Total=0 # BEAM-4:175 :: Total=0 :::::::::::::: gsb_gac.dat :::::::::::::: # GSB GAC configuration is as follows : # BEAM-1:130 :: C00 C08 C10 C13 C14 E03 S01 S02 W02 Total=9 # BEAM-1:175 :: C00 C08 C10 C13 C14 E03 S01 S02 W02 Total=9 # BEAM-2:130 :: C00 C08 C10 C13 C14 E03 S01 S02 W02 Total=9 # BEAM-2:175 :: C00 C08 C10 C13 C14 E03 S01 S02 W02 Total=9 05:40 : Started Power eq and phasing on 2225-049 06:10 : Power eq and phasing done. 06:15 : Started command file. 06:24 : online subar-array problem, resolved after about 5 min. 06:30 : restarted command file. GSB shows continuous buffer loss. GSB PA-voltage DATA is not getting recorded. buffer loss increases after starting PA recording script 07:00 : Started command file. /odisk/gtac/cmd/bcj/37_004_09mar2020.cmd 08:22 : Stopped command file and observation session is over.