GTAC Observation Log 1. Date : 18/12/2017 2. Observation Sr. No. : 9964 3. Observer : Yashwant Gupta, BHAL CHANDRA JOSHI, Nikhil Vijay Naik, Kishalay De, Yogesh Maan, Manjari Bagchi, Jayanta Roy, Gopakumar Achamveedu 4. Observer's Email : ygupta@ncra.tifr.res.in, bcj@ncra.tifr.res.in, naiknikhil27@gmail.com, ugkishalayde@ug.iisc.in, ymaan@ncra.tifr.res.in, manjari.bagchi@gmail.com, jroy@ncra.tifr.res.in, gopu.tifr@gmail.com 5. Project Name : Towards precision pulsar timing with the upgraded GMRT 6. Project Code : 33_076 7. Operator(s) : Pramod, Rupsing, Surender 8. Command File : /odisk/gtac/cmd 9. LTA File : /gwbifrdata/18dec/33_076_18dec2017_gwb_750lo.lta.1, /gwbifrdata/18dec/33_076_18dec2017_gwb_750lo.lta, /gwbifrdata/18dec/33_076_18dec2017_gwb_500lo.lta.1, /gwbifrdata/18dec/33_076_18dec2017_gwb_500lo.lta, /gwbifrdata/18dec/33_076_18dec2017_gwb_1460lo.lta.1, /gwbifrdata/18dec/33_076_18dec2017_gwb_1460lo.lta 10. LogFlag File : /odisk/online1/logflags/33_076C.FLAGS.11, /odisk/online1/logflags/33_076B.FLAGS.11, /odisk/online1/logflags/33_076.FLAGS.14 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1454 MHz ,RF2 : 1454 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1505 MHz, ILO2 : 1505MHz , 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) : 1454 1454 1505 1505 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : C12 : Antenna Warranty period touch-up Painting. E04 : Antenna reflector surface refurbishment work. E06 : Antenna full painting S06 : Servo problem. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 18 Dec 2017 09:00:00 - 18 Dec 2017 14:20:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :26 37. 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 : 2048 GPU_CHAN_NUM : 0:2047:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF2 : 500 500 GPU_DDCLO2 : 0.0000 0.0000 GPU_SB2 : 1 1 GCODE2 : 33_076B GPU_RF3 : 750 750 GPU_DDCLO3 : 0.0000 0.0000 GPU_SB3 : 1 1 GCODE3 : 33_076C GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 33_076 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : Voltage GPU_BEAM_2 : PA GPU_BEAM_3 : PA GPU_BEAM_4 : PA GPU_BM_INT : 8 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 64 inputs. GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------------------------------------------------- 09:05 # sub 2 # Band:3 # C01 C04 C06 W01 S01 # sub 3 # Band:4 # C02 C03 C09 W02 E03 S02 # sub 4 # Band:5 # C00 C05 C08 C10 C11 C13 C14 W03 W04 W05 W06 E02 E05 S03 S04 -------------------------------------------------------------------------- 09:20 : Setup done(RF & GAB LO for all bands) -------------------------------------------------------------------------- # BEAM-1:130 :: C00 C05 C08 C10 C11 C13 C14 E02 E05 S03 S04 W03 W04 W05 W06 Total=15 # BEAM-1:175 :: C00 C05 C08 C10 C11 C13 C14 E02 E05 S03 S04 W03 W04 W05 W06 Total=15 # BEAM-2:130 :: C01 C04 C06 S01 W01 Total=5 # BEAM-2:175 :: C01 C04 C06 S01 W01 Total=5 # BEAM-3:130 :: C00 C05 C08 C10 C11 C13 C14 E02 E05 S03 S04 W03 W04 W05 W06 Total=15 # BEAM-3:175 :: C00 C05 C08 C10 C11 C13 C14 E02 E05 S03 S04 W03 W04 W05 W06 Total=15 # BEAM-4:130 :: C02 C03 C09 E03 S02 W02 Total=6 # BEAM-4:175 :: C02 C03 C09 E03 S02 W02 Total=6 --------------------------------------------------------------------------- 09:30 : Power eq. done for all bands (3C286). --------------------------------------------------------------------------- 09:35 : Phasing done on 3C286. --------------------------------------------------------------------------- 09:47 : Started command file. --------------------------------------------------------------------------- 09:50 : Suba 3 dose node getting sndsacsrc(1,12h) command. -------------------------------------------------------------------------- 09:55 : Restarted suba 3 -------------------------------------------------------------------------- 09:58 : Restarted commanfil -------------------------------------------------------------------------- 11:06 : Pulsar data of all beam is different file size. -------------------------------------------------------------------------- 12:10 : GWB Band shape 60 to 70 % low. -------------------------------------------------------------------------- 12:15 : GWB problem following error shows Exited correlator thread in node 11 Exited correlator thread in node 19 Exited correlator thread in node 20 Exited correlator thread in node 12 Exited correlator thread in node 7 Exited correlator thread in node 3 Exited correlator thread in node 16 Exited correlator thread in node 8 Exited correlator thread in node 4 Exited correlator thread in node 1 -------------------------------------------------------------------------- 12:25 : Restarted GWB and now working -------------------------------------------------------------------------- 12:35 : GWB beam data not recording. -------------------------------------------------------------------------- 12:39 : Restarted command file -------------------------------------------------------------------------- 14:16 : Stopped command file and observation closed. -------------------------------------------------------- Note : 7 pulsars completed --------------------------------------------------------