GTAC Observation Log 1. Date : 13/12/2019 2. Observation Sr. No. : 11673 3. Observer : Pratik Dabhade, Mousumi Mahato, D.J. Saikia 4. Observer's Email : pratikdabhade13@gmail.com, mousumimahato187@gmail.com, dhrubasaikia@iucaa.in 5. Project Name : Estimating magnetic fields and spectral ages of giant radio galaxies 6. Project Code : 37_075 7. Operator(s) : Navnath, Nilesh, Surender 8. Command File : /odisk/gtac/cmd/37_075/obs.cmd 9. LTA File : /gsbifrdata1/12dec/37_075_12dec2019_gsb.lta, /gwbifrdata1/12dec/37_075_12dec2019_gwb.lta 10. LogFlag File : /odisk/online1/logflags/37_075.FLAGS ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1399 MHz ,RF2 : 1399 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1450 MHz, ILO2 : 1450MHz , 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) : 1399 1399 1450 1450 51 51 30. Integration Time : 4.0265 Sec 31. No of Antennas Working(Fringing) at the beginning :29 32. Name of Non-Working Antennas (with reason for each) : W04 : Servo Time out. 33. Note for Backup : 34. Start and End Time of Obs.(IST): 12 Dec 2019 22:00:00 - 13 Dec 2019 02:20:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :29 37. RFI Status : 38. Comments (During Observations) : 21:30 : Started setup through TGC. 21:40 : Power eq done. C10 : RF stetting problem through TGC using rf_cm switch. E02 & S06 : fringe vanishes after RF settings. W02 : LMC(Miltech PC) is not up. W04 : Servo Time out. Antenna count with TGC = 25. Antenna Count with ONLINE = 29 21:55 : Decided to switch control back to ONLINE. ------------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 : 4096 GPU_CHAN_NUM : 0:4095:1 GPU_STOKES : Total_Intensity GPU_SIDEBAND : 1 1 GPU_RF4 : 1450 1450 GPU_DDCLO4 : 0.0000 0.0000 GPU_SB4 : 1 1 GCODE4 : 37_075 GPU_CNTRL : ONLINE GPU_FSTOP : ON GPU_BEAM_1 : OFF GPU_BEAM_2 : OFF GPU_BEAM_3 : OFF GPU_BEAM_4 : OFF GPU_BM_INT : 4 GPU_GAINEQ : OFF GPU_TPA : From GWB GUI. GPU_BITS : 4 Bits GPU_FILRFI : RFI Filterring OFF GPU_BEAM_S : OFF -------------------------------- 22:00 : Started setup. 22:08 : Started scan on 3C48 for 12 min. 22:30 : Started cmd file. /odisk/gtac/cmd/37_075/obs.cmd 02:06 : Stopped command file. 02:10 : Started scan on 3C147 for ~ 10.469 min. 02:20 : Stopped scan and observing session over. -----------------------------------------------------------------------