GTAC Observation Log 1. Date : 09/11/2019 2. Observation Sr. No. : 11573 3. Observer : Arpita Choudhary, BHAL CHANDRA JOSHI, Manjari Bagchi, Abhimanyu Susobhanan, Dhruv Pathak, LANKESWAR DEY, Shantanu Desai, Krishnakumar MA, Mayuresh Surnis, Yogesh Maan, Suryarao Bethapudi, Neelam Dhanda Batra, SAICHAITANYA SUSARLA, Gopakumar Achamveedu, Yashwant Gupta, Avishek kumar Basu, Periasamy K. Manoharan, Prabu Thiagaraj 4. Observer's Email : arp.astro@gmail.com, bcj@ncra.tifr.res.in, manjari.bagchi@gmail.com, s.abhimanyu@tifr.res.in, pathakdhruv9786@gmail.com, LANKY441@gmail.com, shntn05@gmail.com, kk.ambalappat@gmail.com, mayuresh.surnis@mail.wvu.edu, maan@astron.nl, ep14btech11008@iith.ac.in, neelam.dhanda@gmail.com, saichaitanya16@iisertvm.ac.in, gopu.tifr@gmail.com, ygupta@ncra.tifr.res.in, avishek@ncra.tifr.res.in, mano@ncra.tifr.res.in, prabu@rri.res.in 5. Project Name : A Study of possible profile mode changes in the millisecond pulsar J2124-3358 6. Project Code : 37_013 7. Operator(s) : Navnath 8. Command File : /odisk/gtac/cmd/37_013/37_013_09Nov2019.cmd.txt 9. LTA File : /gwbifrdata2/09nov/37_013B_09nov2019_suba3_band4.lta, /gwbifrdata2/09nov/37_013A_09nov2019_suba4_band4.lta 10. LogFlag File : /odisk/online1/logflags/37_013B.FLAGS.1, /odisk/online1/logflags/37_013A.FLAGS.1 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 591 MHz ,RF2 : 591 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 540 MHz, ILO2 : 540MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+14 dB, 32 MHz,OFF, IF-CH2 : 4+14 dB, 32 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 : 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) : 591 591 540 540 51 51 30. Integration Time : 2.0132 Sec 31. No of Antennas Working(Fringing) at the beginning :24 32. Name of Non-Working Antennas (with reason for each) : C01 : : Servo Brakes C04 : : Mechanical Work C05 : : Feed not in focus C11 : : Feed jam E05 : : Servo problem W03 : no fringe. : 33. Note for Backup :Satellite RFI in BAND3 while doing phasing. 34. Start and End Time of Obs.(IST): 09 Nov 2019 15:00:00 - 09 Nov 2019 17:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :24 37. RFI Status :Satellite RFI in BAND3 while doing phasing @ 15:45 on 1822-096. 09Nov2019 15:26:01 prj: 37_013B sub: 3 src: 1822-096 ra: 18.37 dec: -9.65 az: 170.73 el: 60.91 tpa: 306.000 306.000 255 255 51.0000 51.0000 sat: 40887 name: MUOS-4 freq: 325 MH 09Nov2019 16:07:32 prj: 37_013B sub: 3 src: 1822-096 ra: 18.37 dec: -9.65 az: 191.83 el: 60.69 tpa: 306.000 306.000 255 255 51.0000 51.0000 sat: 40887 name: MUOS-4 freq: 325 MHz total User's time lost : 20 minuts. 38. 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 : 1024 GPU_CHAN_NUM : 0:1023:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF2 : 1460 1460 GPU_DDCLO2 : 0.0000 0.0000 GPU_SB2 : 1 1 GCODE2 : SUBA2 GPU_RF4 : 550 550 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : -1 -1 GCODE4 : 37_013A GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : PA GPU_BEAM_2 : Voltage GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 4 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 8 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- 14:49 : old das pntg chain stopped. 15:05 : Started setup for Multi Sub array Observation. 15:10 : restarted two new Users U2.pl and User4. 15:10 : There is problem in Started U3.pl user. : Restarted alll users and subac. 15:15 : Started sub-array splitting. #Band3# sub 3 # C01 C02 C03 C05 C06 C09 C11 C12 C13 C14 ante 10 6 5 1 19 20 4 9 2 11 10 cp 0;defs 3;subar 3 # Band4 #sub 4 # C00 C08 C10 W01 W02 W03 E02 E03 S01 S02 S03 ante 11 7 24 12 8 13 14 17 18 26 27 28 cp 0;defs 4;subar 4 #Not in Use for obs# sub 5 # C04 W04 W05 W06 E04 E05 E06 S04 S06 ante 9 3 15 16 25 21 22 23 29 30 cp 0;defs 5;subar 5 15:20 : Started setup feed ratation to band 3 : Started RF,GAB,OFC for Band3. 15:26 : Started Correlateor ACQ chain for both GSB and GWB in getcmd mode. 15:30 : power eq done on 1822-096 at 120 counts. 15:45 : 4 ants out of 9 ants for band3 C01,C09,C11,C05 : tried fpsboot,initfp for C09 and C05.. successfully rotated. 15:50 : phasing done for band 4 ..failed for Band 3 due to RFI. 16:05 : phasing done..GAC confi done as follow. # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C08 C10 E02 E03 S01 S02 S03 W01 W02 Total=10 ..removed W03 # BEAM-1:175 :: C00 C08 C10 E02 E03 S01 S02 S03 W01 W02 Total=10 # BEAM-2:130 :: C02 C03 C05 C06 C09 C12 C13 C14 Total=8 # BEAM-2:175 :: C02 C03 C05 C06 C09 C12 C13 C14 Total=8 : Remofed C01 and C11. 16:06 : Started cmd file. /odisk/gtac/cmd/37_013/37_013_09Nov2019.cmd.txt 16:10 : stopped cmd file due to incorrect source list path in user's cmd file. addlist '/odisk/gtac/source/bcj/src37013.list' 16:15 : added correct source list manually to Sub array controller. 16:20 : As per BCJ's suggest started moving towards other phas cal. 16:25 : started phasing manually on 2225-049. 16:28 : Phasing done. 16:33 : Started scan on TEST pulsar J2145-0750. 16:40 : Voltage recording failed due to wrong Beam selection in Initial GwB settings. * suba 4 - Band 4 - Beam 3 PA mode but wrongly Configured to BEAM-1 * suba 3 - Band 3 - Beam 1 Voltage mode - CD pipeline but wrongly Configred as BEAM-2 17:00 : Observation session over. -------------------------------------------------------------------------- Note for user: Very less time left so aborted observation session. User has loss of full two hours of his observation time. First One hours for multi sub array setup and due to series of small problems like U3.pl not responding, 3 feed jams,RFI,band 3 phasing problem due strong MUOS satellite and non existence of source list in user's cmd file. Each problems work around took some time. moreover big configuration mistake in Beam selection beam 1 and beam 1 instead of beam 3 and beam 4 while setting Initial GwB settings. and also please note that relevant Call sheets for system problem are raised. here is list of call sheets. 2019.1959,2019.1960,2019.1961,2019.1962,2019.1962,2019.1963.2019.1964 and 2019.1965.