GTAC Observation Log 1. Date : 03/08/2018 2. Observation Sr. No. : 10450 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) : Pramod, Sachin 8. Command File : /odisk/gtac/cmd/bcj/03aug18/obs.cmd 9. LTA File : /gwbifrdata2/03aug/34_102_03aug2018_band5_suba4_gwb.lta.1, /gwbifrdata2/03aug/34_102_03aug2018_band5_suba4_gwb.lta, /gwbifrdata2/03aug/34_102_03aug2018_band4_suba2_gwb.lta.1, /gwbifrdata2/03aug/34_102_03aug2018_band4_suba2_gwb.lta, /gwbifrdata2/03aug/34_102_03aug2018_band3_suba3_gwb.lta.1, /gwbifrdata2/03aug/34_102_03aug2018_band3_suba3_gwb.lta 10. LogFlag File : /odisk/online1/logflags/34_102C.FLAGS.18, /odisk/online1/logflags/34_102B.FLAGS.20, /odisk/online1/logflags/34_102A.FLAGS.16 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1505 MHz ,RF2 : 1505 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1454 MHz, ILO2 : 1454MHz , 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) : 1505 1505 1454 1454 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 : Feed jammed W03 : Frequently applying brakes. W06 : Gear box replacement S04 : Servo problem 33. Note for Backup : 34. Start and End Time of Obs.(IST): 03 Aug 2018 08:00:00 - 03 Aug 2018 13:10:00 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 : 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 : 8 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 64 inputs. GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- # GWB GAC configuration is as follows : # BEAM-1:130 :: C03 C05 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=12 # BEAM-1:175 :: C03 C05 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=12 # 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 S06 W04 W05 Total=10 # BEAM-3:175 :: C00 C02 C08 E04 E05 E06 S03 S06 W04 W05 Total=10 ###610MHz - GABLO 750 MHz Beam-3 # sub 2 # C00 C02 C08 W03 W04 W05 W06 E04 E05 E06 S03 S04 S06 ante 13 7 5 24 14 15 16 25 21 22 23 28 29 30 cp 0;defs 2;subar 2 ###325MHz - GABLO 500 MHz Beam-2 # sub 3 # C01 C04 C06 C09 C12 ante 5 6 3 20 4 2 cp 0;defs 3;subar 3 ###1460MHz - GABLO 1460 MHz Beam-1 # sub 4 # C03 C05 C10 C11 C13 C14 W01 W02 E02 E03 S01 S02 ante 12 1 19 12 9 11 10 8 13 17 18 26 27 cp 0;defs 4;subar 4 07:30 : Started set up. 08:25 : Power equalized and phasing done. 08:30 : Started command file. '/odisk/gtac/cmd/bcj/03aug18/obs.cmd' 12:09 : Electrical power failure to all antennas. 12:09 to 12:50 : Set up done to 3 sub-array. 12:53 : Phasing done on 1021+219. 12:58 : Started scan on J1022+1001 for 8 min. 13:06 : Stopped scan and observation session is over.