GTAC Observation Log 1. Date : 11/08/2018 2. Observation Sr. No. : 10462 3. Observer : BHAL CHANDRA JOSHI, Yashwant Gupta, Manjari Bagchi, Prakash Arumugasamy, Krishnakumar MA, Suryarao Bethapudi, Kishalay De, Yogesh Maan, Mayuresh Surnis, Abhimanyu Susobhanan, Dhruv Pathak, Gopakumar Achamveedu, ARUN KUMAR NAIDU, Neelam Dhanda Batra, Siraprapa Sanpa-arsa 4. Observer's Email : bcj@ncra.tifr.res.in, ygupta@ncra.tifr.res.in, manjari.bagchi@gmail.com, prakash@ncra.tifr.res.in, kkma@ncra.tifr.res.in, ep14btech11008@iith.ac.in, kde@caltech.edu, ymaan@ncra.tifr.res.in, mayuresh.surnis@mail.wvu.edu, s.abhimanyu@tifr.res.in, pathakdhruv9786@gmail.com, gopu.tifr@gmail.com, arun@ncra.tifr.res.in, neelam.dhanda@gmail.com, s.tuck.sanpaarsa@gmail.com 5. Project Name : Indian Pulsar Timing Array (InPTA) experiment using the upgraded wideband GMRT and the ORT 6. Project Code : 34_102 7. Operator(s) : Navnath, Nilesh, Sachin 8. Command File : /odisk/gtac/cmd/bcj/10aug2018/34_102_set2_10aug18.cmd.txt 9. LTA File : /gwbifrdata/10aug/34_102C_10aug2018_750lo_gwb.lta.1, /gwbifrdata/10aug/34_102C_10aug2018_750lo_gwb.lta, /gwbifrdata/10aug/34_102B_10aug2018_500lo_gwb.lta.1, /gwbifrdata/10aug/34_102B_10aug2018_500lo_gwb.lta, /gwbifrdata/10aug/34_102A_10aug2018_1460lo_gwb.lta.1, /gwbifrdata/10aug/34_102A_10aug2018_1460lo_gwb.lta 10. LogFlag File : /odisk/online1/logflags/PNTG.FLAGS.2850 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1371 MHz ,RF2 : 1371 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1320 MHz, ILO2 : 1320MHz , 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) : 1371 1371 1320 1320 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) : C14 : : Mechanical work. W06 : : Mechanical work. W01 : : Low Fringe Band5. S02 : : Phase Jumps in CH1 (pol1) at Band5. S04 : : CH1 (pol1) Low fringe. S06 : : CH1 (pol1) Low fringe. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 10 Aug 2018 15:00:00 - 11 Aug 2018 01:15:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :28 37. Comments (During Observations) : 15:00 : 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_RF2 : 750 750 GPU_DDCLO2 : 0.0000 0.0000 GPU_SB2 : 1 1 GCODE2 : 34_102C GPU_RF3 : 500 500 GPU_DDCLO3 : 0.0000 0.0000 GPU_SB3 : 1 1 GCODE3 : 34_102B GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 34_102A GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : Voltage GPU_BEAM_2 : Voltage GPU_BEAM_3 : PA 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 -------------------------------- # GWB GAC configuration is as follows : # BEAM-1:130 :: C03 C05 C10 C11 C13 E02 E03 S01 W02 Total=9 # BEAM-1:175 :: C03 C05 C10 C11 C13 E02 E03 S01 W02 Total=9 # BEAM-2:130 :: C01 C04 C06 C09 C12 Total=5 # BEAM-2:175 :: C01 C04 C06 C09 C12 Total=5 # BEAM-3:130 :: C00 C02 C08 E04 E05 E06 S03 W03 W04 W05 Total=10 # BEAM-3:175 :: C00 C02 C08 E04 E05 E06 S03 W03 W04 W05 Total=10 15:45 : Started phasing on 3C286. 16:03 : Started command file. 17:40 : S04 and S06 seems to be working, added to GAC. # GWB GAC configuration is as follows : # BEAM-1:130 :: C03 C05 C10 C11 C13 E02 E03 S01 W02 Total=9 # BEAM-1:175 :: C03 C05 C10 C11 C13 E02 E03 S01 W02 Total=9 # BEAM-2:130 :: C01 C04 C06 C09 C12 Total=5 # BEAM-2:175 :: C01 C04 C06 C09 C12 Total=5 # BEAM-3:130 :: C00 C02 C08 E04 E05 E06 S03 S04 S06 W03 W04 W05 Total=12 # BEAM-3:175 :: C00 C02 C08 E04 E05 E06 S03 S04 S06 W03 W04 W05 Total=12 20:35 : C12 intermittent servo problem. 21:45 : Noticed that, GWB LTA scan numbers are not in matching sequence for each sub-array. So, Restarted GWB at 22:05 IST after a scan on J1909-3744. 22:15 : Started command file for remaining sources. 22:45 : C12 Servo problem, removed from GAC. 01:15 : observation session over. -------------------------------------------------------- # GWB GAC configuration is as follows : # BEAM-1:130 :: C03 C05 C10 C11 C13 E02 E03 S01 W02 Total=9 # BEAM-1:175 :: C03 C05 C10 C11 C13 E02 E03 S01 W02 Total=9 # BEAM-2:130 :: C01 C04 C06 C09 Total=4 # BEAM-2:175 :: C01 C04 C06 C09 Total=4 # BEAM-3:130 :: C00 C02 C08 E04 E05 E06 S03 S04 S06 W03 W04 W05 Total=12 # BEAM-3:175 :: C00 C02 C08 E04 E05 E06 S03 S04 S06 W03 W04 W05 Total=12