IVS-T2122 (International VLBI Service - Terrestical Reference Frame Observations) 2017 Nov.14-15 doy 318-319 Institute for Geodesy and Geoinformation (IGGB) of the University of Bonn, Germany Nominal Start Time: 2017:318:17h30 UT Nominal End Time: 2017:319:17h30 UT Duration: 24.0 hr Correlator: BONN Participating stations ====================== Bd=BADARY Sm=CRIMEA Ht=HART15M Kb=KASHIM34 K1=KASHIM11 Ke=KATH12M Ny=NYALES20 Oh=OHIGGINS Kv=SEJONG Sh=SESHAN25 Sv=SVETLOE Ur=URUMQI Wz=WETTZELL Yg=YARRA12M 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. We have to vacate some satellite passages on OHIG station. That produce several observing gaps during this 24 hours. Session Notes for session: t2122 =========================================================== Experiment: T2122 Description IVS-T2.122 Scheduler: IGGB/Muesk Correlator: BONN Start: 2017-318-17:30:00 End: 2017-319-17:30:00 Current yyyyddd: 2017318 (2017.87) ( 18072 MJD, TUES 14NOV.) =========================================================== First observations Observation listing from file t2122.skd for experiment T2122 Source Start DURATIONS name yyddd-hhmmss Bd Sm Ht Kb K1 Ke Ny Oh Kv Sh Sv Ur Wz Yg Zc 0402-362 17318-173000| 215 215 | 0642+449 17318-173000| 38 382 127 762 610 171 348 65 54 122 115 762 53| Last observations 0229+131 17319-171634| 195 782 782 436 548 | 1741-038 17319-171852| 119 119 | 0017+200 17319-172314| 214 214 | 0059+581 17319-172744| 22 69 69 55 62 20 47 36 21| =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 0.8 Min = 0.0 Max = 38.9 (Baseline K1-Oh on 2227-088) RMS = 2.8 Total time: 1438 minutes ( 24.0 hours). Key: Bd=BADARY Sm=CRIMEA Ht=HART15M Kb=KASHIM34 K1=KASHIM11 Ke=KATH12M Ny=NYALES20 Oh=OHIGGINS Kv=SEJONG Sh=SESHAN25 Sv=SVETLOE Ur=URUMQI Wz=WETTZELL Yg=YARRA12M Zc=ZELENCHK Bd Sm Ht Kb K1 Ke Ny Oh Kv Sh Sv Ur Wz Yg Zc Avg % obs. time: 39 56 69 53 56 68 54 54 55 47 42 56 50 66 41 54 % cal. time: 2 2 2 2 2 2 2 1 2 2 3 2 2 2 3 2 % slew time: 34 25 11 25 7 7 12 6 10 28 35 24 7 6 34 19 % idle time: 23 16 17 19 34 22 31 37 31 22 20 17 39 24 22 25 total # scans: 214 161 175 190 188 185 190 114 196 211 224 187 202 173 219 188 # scans/hour : 9 7 7 8 8 8 8 5 8 9 9 8 8 7 9 8 Avg scan (sec): 159 300 342 240 256 319 247 409 244 193 160 256 215 331 161 255 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Total TB(M5): 0.5 0.8 1.0 0.7 0.8 0.9 0.8 0.7 0.8 0.7 0.6 0.8 0.7 0.9 0.6 0.7 # OF OBSERVATIONS BY BASELINE | Bd Sm Ht Kb K1 Ke Ny Oh Kv Sh Sv Ur Wz Yg Zc Total ------------------------------------------------------------------------------------- Bd| 55 26 93 47 27 70 0 60 107 108 113 79 28 115 928 Sm| 31 29 37 19 83 8 41 43 81 79 80 14 108 708 Ht| 7 4 8 11 97 10 20 33 25 37 15 38 362 Kb| 90 39 47 1 77 137 45 71 34 27 49 746 K1| 58 46 2 130 75 28 46 29 38 32 662 Ke| 20 1 62 41 16 23 12 140 17 483 Ny| 2 53 61 97 85 95 15 79 764 Oh| 0 0 6 3 11 5 6 142 Kv| 88 42 60 35 42 44 744 Sh| 58 99 48 34 65 876 Sv| 88 144 17 170 933 Ur| 67 23 99 881 Wz| 10 129 810 Yg| 15 423 Zc| 966 Number of 2-station scans: 431 Number of 3-station scans: 136 Number of 4-station scans: 87 Number of 5-station scans: 59 Number of 6-station scans: 38 Number of 7-station scans: 27 Number of 8-station scans: 26 Number of 9-station scans: 12 Number of 10-station scans: 4 Number of 11-station scans: 6 Number of 12-station scans: 1 Number of 13-station scans: 5 Total number of scans: 832 Total number of obs: 5214 Total integrated obs-time: 872782 Average obs-time: 167.4 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode for: BADARY CRIMEA HART15M KASHIM11 KATH12M NYALES20 SEJONG SESHAN25 SVETLOE URUMQI YARRA12M 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: KASHIM34 OHIGGINS 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 ===========================================================