IVS-T2117 (International VLBI Service - Terrestical Reference Frame Observations) 2017 Mar.28/29 doy 087-088 Institute for Geodesy and Geoinformation (IGGB) of the University of Bonn, Germany Nominal Start Time: 2017:087:17h30 UT Nominal End Time: 2017:088:17h30 UT Duration: 24.0 hr Correlator: BONN Participating stations (16) ====================== Bd=BADARY Sm=CRIMEA 34=DSS34 Kb=KASHIM34 K1=KASHIM11 Kg=KOGANEI Nt=NOTO Ny=NYALES20 Kv=SEJONG Sh=SESHAN25 Sv=SVETLEO Ur=URUMQI Vm=VERAMZSW Wz=WETTZELL 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. 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. Session Notes for session: t2117 =========================================================== Experiment: T2117 Description IVS-T2.117 Scheduler: IGGB/Muesk Correlator: BONN Start: 2017-087-17:30:00 End: 2017-088-17:30:01 Current yyyyddd: 2017087 (2017.24) ( 17841 MJD, TUES 28MAR.) =========================================================== First observations Observation listing from file t2117.skd for experiment T2117 Source Start DURATIONS name yyddd-hhmmss Bd Sm Kb K1 Nt Ny Kv Sh Ur Vm Wz Ys Zc 34 Sv Kg 0059+581 17087-173000| 43 360 26 178 252 134 430 226 430 101 77 168| 1144-379 17087-173000| 125 77 125 31 | Last observations 0925-203 17088-171616| 675 675 272 127 | 1334-127 17088-172246| 25 25 115 25 46 25 115| 0458-020 17088-172300| 50 28 50 36 25 | 1749+096 17088-172551| 34 25 154 60 27 154| 0552+398 17088-172620| 25 25 25 25 25 25 | 0727-115 17088-172911| 25 25 25 25 25 25 25 | =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 1.4 Min = 0.0 Max = 80.0 (Baseline Ys-34 on 0834-201) RMS = 4.0 Total time: 1440 minutes ( 24.0 hours). Key: Bd=BADARY Sm=CRIMEA Kb=KASHIM34 K1=KASHIM11 Nt=NOTO Ny=NYALES20 Kv=SEJONG Sh=SESHAN25 Ur=URUMQI Vm=VERAMZSW Wz=WETTZELL Ys=YEBES40M Zc=ZELENCHK 34=DSS34 Sv=SVETLOE Kg=KOGANEI Bd Sm Kb K1 Nt Ny Kv Sh Ur Vm Wz Ys Zc 34 Sv Kg Avg % obs. time: 34 59 30 58 46 51 62 48 47 64 42 56 32 20 31 57 46 % cal. time: 3 2 3 2 2 2 2 2 2 2 2 2 3 2 3 2 2 % slew time: 36 26 32 7 31 12 4 24 25 9 7 20 37 25 36 7 21 % idle time: 25 12 35 32 19 35 31 25 25 24 48 21 27 52 29 33 30 total # scans: 237 151 242 191 207 185 177 198 202 159 212 179 240 209 243 187 201 # scans/hour : 10 6 10 8 9 8 7 8 8 7 9 7 10 9 10 8 8 Avg scan (sec): 126 338 106 262 194 236 303 208 203 346 171 271 114 83 111 263 207 # data tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Total TB(M5): 0.5 0.8 0.4 0.8 0.6 0.7 0.9 0.7 0.7 0.9 0.6 0.8 0.4 0.3 0.4 0.8 0.6 # OF OBSERVATIONS BY BASELINE | Bd Sm Kb K1 Nt Ny Kv Sh Ur Vm Wz Ys Zc 34 Sv Kg Total ------------------------------------------------------------------------------------------ Bd| 75 153 49 121 118 55 131 148 39 132 82 158 106 170 67 1604 Sm| 53 21 103 90 35 64 91 35 93 105 118 41 98 40 1062 Kb| 116 69 87 75 150 110 60 83 52 92 150 105 119 1474 K1| 24 41 126 81 63 119 30 37 23 101 30 147 1008 Nt| 95 24 70 97 29 170 124 182 48 164 32 1352 Ny| 51 79 124 53 114 103 113 40 137 61 1306 Kv| 71 68 124 35 42 30 79 39 127 981 Sh| 116 41 75 59 90 120 94 74 1315 Ur| 51 109 93 121 71 128 85 1475 Vm| 34 52 24 53 32 113 859 Wz| 125 178 43 188 42 1451 Ys| 123 20 128 37 1182 Zc| 65 206 39 1562 34| 53 90 1080 Sv| 45 1617 Kg| 1118 Number of 4-station scans: 183 Number of 5-station scans: 86 Number of 6-station scans: 68 Number of 7-station scans: 40 Number of 8-station scans: 42 Number of 9-station scans: 15 Number of 10-station scans: 15 Number of 11-station scans: 24 Number of 12-station scans: 39 Number of 16-station scans: 1 Total number of scans: 513 Total number of obs: 10223 Total integrated obs-time: 1541199 Average obs-time: 150.8 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode for: BADARY CRIMEA KASHIM11 KOGANEI NOTO NYALES20 SEJONG SESHAN25 SVETLOE URUMQI VERAMZSW 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: DSS34 KASHIM34 WETTZELL 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 ===========================================================