IVS-T2125 (International VLBI Service - Terrestical Reference Frame Observations) 2018 May.15-16 doy 135-136 Institute for Geodesy and Geoinformation (IGGB) of the University of Bonn, Germany Nominal Start Time: 2018:135:17h30 UT Nominal End Time: 2018:136:17h30 UT Duration: 24.0 hr Correlator: BONN Participating stations(17) ====================== Bd=BADARY Ft=FORTLEZA Hh=HARTRAO Ht=HART15M Is=ISHIOKA K1=KASHIM11 Ke=KATH12M Kg=KOGANEI Nt=NOTO Ny=NYALES20 Oh=OHIGGINS On=ONSALA60 Kv=SEJONG Wz=WETTZELL Yg=YARRA12M Ys=YEBES40M Zc=ZELENCHK Purpose ======= General the purpose of the IVS-T2 sessions is to monitor the TRF via monthly sessions. Since April 2004 the purpose of the remaining IVS-T2 sessions has been changed by the IVS OPC (Observing Program Committee). The new plan uses larger networks for each T2 session, say 16 to 24 stations, but have fewer T2 sessions during the year. The larger network should provide a stronger solution and better TRF results, even if there are fewer sessions each year. The TRF determine from single session solutions or from a global solution is very important IVS product because this is an essential part for creating the ITRF by corresponding IERS Product Center. A particular strength of VLBI is its contribution to the scale of the ITRF. Usually the TRF is computed from the 24h sessions that are dedicated to observing the EOP. Network ======= The standard configuration of the monthly observed IVS-T2 experiments consists of sixteen and more stations. All stations differ in some extent between all available IVS geodetic network stations from experiment to experiment. Schedule ======== This schedule was generated by the last updated SKED version using the EUR-SX band and the 64-16(EU-T2) EURSX-C-4 frequency setup, depending on which station are available for this observation. Variable scan lengths with a minimum 15 sec. and the most recent source flux models are included. SNR goals are around 20 at X-band and S-band depent on different baselines and stations. The predicted SNRs used include a 30 ps noise contribution added in quadrature, which is a typical magnitude for the reweight constants applied in SOLVE solutions. Eb=EFLSBERG Ht=HART15M Some important optimization features enabled for this experiment : - the covariance analysis during schedule generation considers the previous 1 hours of observations, - minor SKED optimization parameters . maximum number of observations, . minimum time, were optimized over the best ( in a covariance sense ) 75% of the possible observations, this produces a somewhat more even sky distribution, - observations were weighted by their expected SNRs, - 30 ps noise contribution added, - mimimum time between observations of the same radio source was set to 15 min COMMENTS ======== There are no observations for Wettzell from 18:20 U.T. to 19:40 U.T. Wettzell will participate in the Intensive session during this 1.5 hour period. We have to vacate some satellite passages on OHIG station. That produce several observing gaps during this 24 hours. Session Notes for session: t2125 =========================================================== Experiment: T2125 Description IVS-T2.125 Scheduler: IGGB/Muesk Correlator: BONN Start: 2018-135-17:30:00 End: 2018-136-17:30:00 Current yyyyddd: 2018135 (2018.37) ( 18254 MJD, TUES 15MAY.) =========================================================== First observations Observation listing from file t2125.skd for experiment T2125 Source Start DURATIONS name yyddd-hhmmss Bd Ft Hh Ht Is K1 Ke Kg Nt Ny Oh On Kv Wz Yg Ys Zc 0059+581 18135-173000| 45 118 196 195 196 | 1255-316 18135-173000| 349 349 | OJ287 18135-173000| 174 79 64 57 140 174 61 70 133| =========================================================== 1606+106 18136-171835| 518 518 | 1334-127 18136-172150| 113 337 388 388 | 0537-441 18136-172154| 364 340 364 | 0454-234 18136-172303| 105 105 | 1751+288 18136-172610| 122 122 | 0017+200 18136-172624| 124 124 | 1034-293 18136-172722| 38 42 42 42| =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 0.9 Min = 0.0 Max = 41.8 (Baseline Ke-Yg on 1741-038) RMS = 3.3 Total time: 1438 minutes ( 24.0 hours). Key: Bd=BADARY Ft=FORTLEZA Hh=HARTRAO Ht=HART15M Is=ISHIOKA K1=KASHIM11 Ke=KATH12M Kg=KOGANEI Nt=NOTO Ny=NYALES20 Oh=OHIGGINS On=ONSALA60 Kv=SEJONG Wz=WETTZELL Yg=YARRA12M Ys=YEBES40M Zc=ZELENCHK Bd Ft Hh Ht Is K1 Ke Kg Nt Ny Oh On Kv Wz Yg Ys Zc Avg % obs. time: 47 46 52 57 58 64 64 64 51 62 21 58 61 50 62 59 40 54 % cal. time: 3 1 2 2 3 3 3 3 3 2 1 2 3 2 3 2 3 2 % slew time: 36 21 37 12 5 9 9 8 33 13 3 14 12 6 9 16 39 17 % idle time: 13 30 8 28 33 24 24 24 13 22 74 25 24 41 25 22 18 27 total # scans: 233 125 179 187 244 241 229 228 221 206 45 195 229 213 230 199 239 202 # scans/hour : 10 5 7 8 10 10 10 10 9 9 2 8 10 9 10 8 10 8 Avg scan (sec): 174 318 251 261 205 228 239 244 198 260 405 255 228 201 234 256 144 240 # data tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Total GB(M5): 648 636 718 782 800 878 877 890 699 858 291 797 836 684 862 814 550 742 # OF OBSERVATIONS BY BASELINE | Bd Ft Hh Ht Is K1 Ke Kg Nt Ny Oh On Kv Wz Yg Ys Zc Total ----------------------------------------------------------------------------------------------- Bd| 6 16 25 109 49 23 55 61 71 0 52 61 69 25 45 100 767 Ft| 44 41 0 0 0 0 21 12 16 29 0 15 0 37 22 243 Hh| 133 6 2 7 2 52 8 9 22 3 35 21 40 39 439 Ht| 10 4 6 6 66 23 12 30 4 51 12 52 50 525 Is| 129 41 136 25 60 0 25 101 33 31 23 39 768 K1| 66 189 12 41 0 21 149 12 46 16 16 752 Ke| 57 7 14 0 7 68 8 187 2 14 507 Kg| 15 43 0 20 143 17 45 18 21 767 Nt| 93 0 92 17 167 9 123 140 900 Ny| 0 105 42 102 10 104 88 816 Oh| 1 0 1 7 0 2 48 On| 32 94 10 108 91 739 Kv| 16 54 16 32 738 Wz| 9 113 127 869 Yg| 4 11 481 Ys| 102 803 Zc| 894 Number of 2-station scans: 544 Number of 3-station scans: 193 Number of 4-station scans: 126 Number of 5-station scans: 75 Number of 6-station scans: 57 Number of 7-station scans: 38 Number of 8-station scans: 15 Number of 9-station scans: 4 Number of 10-station scans: 5 Number of 11-station scans: 4 Number of 12-station scans: 2 Number of 15-station scans: 1 Total number of scans: 1064 Total number of obs: 5528 Total integrated obs-time: 1028855 Average obs-time: 186.1 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode for: BADARY HARTRAO HART15M ISHIOKA KASHIM11 KATH12M KOGANEI NOTO NYALES20 SEJONG WETTZELL YARRA12M YEBES40M ZELENCHK Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 128 Mbits 64 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 4.00 MHz 1 16(*1) 16 X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 80.0 MHz rms spanned bw= 30.2 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 10.00 6.00 16.00 Recording mode for: FORTLEZA OHIGGINS ONSALA60 Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:2 128 Mbits 64 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 4.00 MHz 1 16(*2) 32 X-band spanned bw= 360.0 MHz rms spanned bw= 140.2 MHz S-band spanned bw= 80.0 MHz rms spanned bw= 30.2 MHz Effective number of 1-bit channels recorded per sub-pass X S Total 10.00 6.00 16.00 ===========================================================