GTAC Observation Log 1. Date : 24/07/2018 2. Observation Sr. No. : 10431 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) : Rupsing, Sachin, Surender 8. Command File : /odisk/gtac/cmd/bcj/23jul/23july18.cmd 9. LTA File : /gwbifrdata1/23jul/34_102__23jul2018_gwb_1460lo.lta, /gwbifrdata1/23jul/34_102_23jul2018_gwb_750lo.lta, /gwbifrdata1/23jul/34_102_23jul2018_gwb_500lo.lta.1, /gwbifrdata1/23jul/34_102_23jul2018_gwb_500lo.lta 10. LogFlag File : /odisk/online1/logflags/34_102C.FLAGS.15, /odisk/online1/logflags/34_102B.FLAGS.17, /odisk/online1/logflags/34_102A.FLAGS.15 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+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) : 1454 1454 1505 1505 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :28 32. Name of Non-Working Antennas (with reason for each) : S03 : : Taken for Mech work. W06 : : Taken for Mech work. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 23 Jul 2018 16:00:00 - 24 Jul 2018 02:10:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :27 37. Comments (During Observations) : 16:00 : Started set-up. ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 2 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 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=11 # BEAM-1:175 :: C03 C05 C10 C11 C13 C14 E02 E03 S01 S02 W01 W02 Total=12 # 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 S04 W03 W04 Total=7 # BEAM-3:175 :: C00 C02 C08 E04 S04 W03 W04 Total=7 ---------------------------------- 16:41:30 : Started command file. "/odisk/gtac/cmd/bcj/23jul/23july18.cmd" 16:23:00 : W06 released for observation. 17:30:00 : W03 & S04 removed GAC Servo problem. 21:50 : After this time it is observed that recording for ltafiles for 500 and 750 starts recording but does not record scans. Tried to restart recording but didn't worked. Since phasing was working and scans were starting successfully without any problem.So continued observation, raised callsheet for this problem. 02:10 : Closed command file and closed observation session.