GTAC Observation Log 1. Date : 24/07/2014 2. Observation Sr. No. : 7244 3. Observer : Sandeep K. Sirothia, Gopal krishna, Mukul Pradeep Mhaskey, Nimisha Kantharia, C.H. IshwaraChandra 4. Observer's Email : sirothia@ncra.tifr.res.in, krishna@ncra.tifr.res.in, mhamu3@gmail.com, ngk@ncra.tifr.res.in, ishwar@ncra.tifr.res.in 5. Project Name : Accurate determination of the sharply inverted spectra of (TGSS) extragalactic radio sources at metrewavelengths 6. Project Code : 26_063 7. Operator(s) : Shilpa 8. Command File : /odisk/gtac/cmd/26_063_21cm/20140724.cmd 9. LTA File : /gsbifrdata/24jul/26_063_24jul2014.lta 10. LogFlag File : /odisk/online1/logflags/26_063.FLAGS.6 ANTENNA SETTINGS : 11. RF Band(MHz) & Solar Attn(dB)- RF1 : 1371 MHz ,RF2 : 1371 MHz, SA1 : 0 dB, SA2 : 0 dB 12. Ist LO (MHz) & IVth LO (MHz): ILO1 : 1320 MHz, ILO2 : 1320MHz , IVLO1 : 51 MHz, IVLO2 : 51 MHz 13. IF Attn(dB) , IF BW(MHz) & IF ALC : IF-CH1 : 4+12 dB, 32 MHz,ON, IF-CH2 : 4+12 dB, 32 MHz,ON GSB SETTINGS : 14. GSB Host : gsbm1 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 : 33.333333 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) : 1371 1371 1320 1320 51 51 30. Integration Time : 16.1061 Sec 31. No of Antennas Working(Fringing) at the beginning :26 32. Name of Non-Working Antennas (with reason for each) : C09 : MCM link is not visible. W03 : Servo Off. W05 : BLDC Work. S03 : Servo Problem (Stow not releasing). 33. Note for Backup : 34. Start and End Time of Obs.(IST): 24 Jul 2014 09:40:00 - 24 Jul 2014 12:00:00 35. ONLINE Machine : Shivneri 36. No of Antennas Working(Fringing) at the end :26 37. Comments (During Observations) : 08:40 : Started settings. 09:56 : Started scan on 3C147. 10:09 : Stopped scan. 10:15 : '/odisk/gtac/cmd/26_063_21cm/20140724.cmd' command file started. 10:37 : S03 started working. 11:15 : W01 servo problem. 11:35 : Started scan on 3C147. 11:52 : Stopped scan and observing session over.