GTAC Observation Log 1. Date : 28/05/2021 2. Observation Sr. No. : 13128 3. Observer : Nissim Kanekar,Jayanta Roy 4. Observer\'s Email : nkanekar@ncra.tifr.res.in,jroy@ncra.tifr.res.in 5. Project Name : DDTC171 Observation. 6. Project Code : DDTC171 7. Operator(s) : Rupsing 8. Command File : /data1/gtac/cmd/jroy/ddtc171_28may.py 9. LTA File : /gwbifrdata1/28may/ddtc171_28may2021_gwb_band5.lta, /gwbifrdata2/28may/ddtc171_28may2021_gwb_band3.lta 10. LogFlag File : ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1398 MHz ,RF2 : 1398 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1460 MHz, ILO2 : 1460MHz , IVLO1 : 62 MHz, IVLO2 : 62 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 24+4 dB, 32 MHz,OFF, IF-CH2 : 24+4 dB, 32 MHz,OFF GSB SETTINGS : 14. GSB Host : gsbm1_shivneri 15. GSB Mode : Realtime 16. GSB LTA : 8 17. GSB CTRL : ONLINE/TGC 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) : 1398 1398 1460 1460 62 62 30. Integration Time : 2.0132 Sec 31. No of Antennas Working(Fringing) at the beginning :23 32. Name of Non-Working Antennas (with reason for each) : C03 : Mechanical Work. E02 : No fringe @130 pol. C04 : Servo problem. C09 : Servo problem. S02 : GAB problem. E06 : GAB problem. S04 : Taken by FE group. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 28 May 2021 08:00:00 - 28 May 2021 12:30:00 35. ONLINE Machine : TGC 36. No of Antennas Working(Fringing) at the end :25 37. RFI Status : 38. Comments (During Observations) : ------------GWB Setting--------- GPU_MODE : Realtime GPU_LTA : 4 GPU_ACQ_BW : 400.0000 GPU_FINAL_BW : 400 GPU_EDGE_FRQ : 0 GPU_CHAN_MAX : 8192 GPU_CHAN_NUM : 0:8191:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF3 : 550 550 GPU_DDCLO3 : 0.000000 0.000000 GPU_SB3 : 1 1 GCODE3 : SUBA3 GPU_RF4 : 1460 1460 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : SUBA4 GPU_CNTRL : ONLINE/TGC GPU_FSTOP : ON GPU_BEAM_1 : IA GPU_BEAM_2 : PA GPU_BEAM_3 : IA GPU_BEAM_4 : PA GPU_BM_INT : 16 GPU_GAINEQ : ON GPU_TPA : From online/TGC tpa GPU_BITS : 4 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF GPU_PFB : ON GPU_PFB_TAPS : 4 GPU_BEAM_BIT : 8 GPU_VLT_BIT : 8 GPU_ENV : TRIAL ------------------------------------------------------------------------- # GWB GAC configuration is as follows : # BEAM-1:130 :: C00 C01 C02 C04 C06 C10 C11 E03 S01 S03 W01 W03 Total=12 # BEAM-1:175 :: C00 C01 C02 C04 C06 C10 C11 E03 S01 S03 W01 W03 Total=12 # BEAM-2:130 :: C00 C01 C02 C04 C06 C10 C11 E03 S01 S03 W01 W03 Total=12 # BEAM-2:175 :: C00 C01 C02 C04 C06 C10 C11 E03 S01 S03 W01 W03 Total=12 # BEAM-3:130 :: C05 C08 C12 C13 C14 E04 E05 E06 S02 S06 W02 W04 W05 Total=13 # BEAM-3:175 :: C05 C08 C12 C13 C14 E04 E05 E06 S02 S06 W02 W04 W05 Total=13 # BEAM-4:130 :: C05 C08 C12 C13 C14 E04 E05 E06 S02 S06 W02 W04 W05 Total=13 # BEAM-4:175 :: C05 C08 C12 C13 C14 E04 E05 E06 S02 S06 W02 W04 W05 Total=13 ------------------------------------------------------------------------ 08:25 : Setup done only GSB(band4 and band5). 08:30 : GSB hltmdas for raw data recording. ------------------------------------------------------------------------ 08:40 : C00,C01,S02,S06 GAB disconnected problem. ------------------------------------------------------------------------ 08:50 : C00 and C01 started working after GAB reconfigure. ------------------------------------------------------------------------ 09:00 : C09 and C04 servo problem. ------------------------------------------------------------------------ 09:10 : Tried servo reset but problem was not solved. ------------------------------------------------------------------------ 09:20 : AGN1 hung(command fail) ------------------------------------------------------------------------ 09:30 : Restarted GWB. ------------------------------------------------------------------------ 09:40 : Repeat all the GWB setup. ------------------------------------------------------------------------ 09:55 : Phasing on 3C138. ------------------------------------------------------------------------ 10:05 : Started command file ------------------------------------------------------------------------ 11:05 : Observation extended due to antenna count less than observer requirement(I have inform to Ishwara Chandra). ------------------------------------------------------------------------ 11:10 : C04,S02 and E06 started working. ----------------------------------------------------------------------- 11:30 : W06 taken for painting and remove from GAC ----------------------------------------------------------------------- 12:30 : Stopped command file and observation closed.