GTAC Observation Log 1. Date : 08/07/2017 2. Observation Sr. No. : 9553 3. Observer : BHAL CHANDRA JOSHI, ARUN KUMAR NAIDU, Geoffrey Wright, Vishal R Gajjar 4. Observer's Email : bcj@ncra.tifr.res.in, arun@ncra.tifr.res.in, geoffrey.wright@manchester.ac.uk, vishalg@berkeley.edu 5. Project Name : Simultaneous multi-frequency study of near harmonic drift and nulls in PSR J1822$-$2256 6. Project Code : 32_080 7. Operator(s) : Nilesh, Rupsing, Surender 8. Command File : /odisk/gtac/cmd 9. LTA File : /gsbifrdata/07jul/32_080_07jul2017.lta, /gwbifrdata/07jul/32_080_07july2017_band5.lta, /gwbifrdata/07jul/32_080_07july2017_band4.lta, /gwbifrdata/07jul/32_080_07july2017_band3.lta 10. LogFlag File : /odisk/online1/logflags/PNTG.FLAGS.2401 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 306 MHz ,RF2 : 306 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 255 MHz, ILO2 : 255MHz , 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) : 306 306 255 255 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :27 32. Name of Non-Working Antennas (with reason for each) : E04 : Servo problem. W03 : Strong RFI lines. S03 : Servo problem. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 07 Jul 2017 23:00:00 - 08 Jul 2017 04:00:00 35. ONLINE Machine : Lenyadri 36. No of Antennas Working(Fringing) at the end :27 37. Comments (During Observations) : ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 400.0000 GPU_FINAL_BW : 400.0000 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 8192 GPU_CHAN_NUM : 0:8191:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF2 : 950 950 GPU_DDCLO2 : 0.0000 0.0000 GPU_SB2 : 1 1 GCODE2 : 32_080A GPU_RF3 : 1500 1500 GPU_DDCLO3 : 0.0000 0.0000 GPU_SB3 : 1 1 GCODE3 : 32_080B GPU_RF4 : 500 500 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 32_080 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : PA GPU_BEAM_2 : PA GPU_BEAM_3 : PA GPU_BEAM_4 : IA GPU_BM_INT : 32 GPU_GAINEQ : ON GPU_TPA : From GWB GUI. GPU_BITS : For 32 inputs GPU_FILRFI : RFI Filterring OFF -------------------------------- 23:00 : Started set-up. # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C01 C04 C06 C08 C09 C10 C12 Total=8 # BEAM-1:175 :: C00 C01 C04 C06 C08 C09 C10 C12 Total=8 # BEAM-2:130 :: C03 C05 C11 C13 C14 E02 S01 W01 W02 Total=9 # BEAM-2:175 :: C03 C05 C11 C13 C14 E02 S01 W01 W02 Total=9 # BEAM-3:130 :: C02 E03 E05 E06 S02 S06 W03 W06 Total=8 # BEAM-3:175 :: C02 E03 E05 E06 S02 S06 W03 W06 Total=8 # BEAM-4:130 :: C02 E03 E05 E06 S02 S06 W03 W06 Total=8 # BEAM-4:175 :: C02 E03 E05 E06 S02 S06 W03 W06 Total=8 ----------------------------------------------------- 23:49:00 : Antennas suba splitting done. 00:19:28 : Started scan on 1830-360 for ~ 0.53687 min. 00:25:19 : Power eq and phasing done on 1830-360. 00:51:57 : Started scan on J1822-2256 for ~ 67.6457 min. 02:00:50 : Started scan on 1830-360 for ~ 6.30823 min. 02:05:00 : W06 Removed from GAC. 02:08:36 : Started scan on J1822-2256 for ~ 59.19 min. 03:08:34 : Started scan on 1830-360 for ~ 5.10027 min. 03:14:32 : Started scan on J1822-2256 for ~ 44.5602 min. 04:05:54 : Started scan on 3C48 for ~ 4.02653 min. 04:10:53 : Started scan on 3C48 for ~ 2.68435 min. 04:11:00 : Stopped scan and observing session over.