IVS-T2124 (International VLBI Service - Terrestical Reference Frame Observations) 2018 Apr.24-25 doy 114-115 Institute for Geodesy and Geoinformation (IGGB) of the University of Bonn, Germany Nominal Start Time: 2018:114:17h30 UT Nominal End Time: 2018:115:17h30 UT Duration: 24.0 hr Correlator: BONN Participating stations(17) ====================== Bd=BADARY Sm=CRIMEA 13=DSS13 Eb=EFLSBERG Ht=HART15M Is=ISHIOKA K1=KASHIM11 Kg=KOGANEI Ny=NIGGINS Is=ISHIOKA On=ONSALA60 Kv=SEJONG Sh=SESHAN25 Sv=SRAMZSW On=ONSALA60 Wz=WETTZELL Ys=YEBES40M 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: t2124 =========================================================== Experiment: T2124 Description IVS-T2.124 Scheduler: BONN Correlator: BONN Start: 2018-114-17:30:00 End: 2018-115-17:30:00 Current yyyyddd: 2018114 (2018.31) ( 18233 MJD, TUES 24APR.) =========================================================== First observations Observation listing from file t2124.skd for experiment T2124 Source Start DURATIONS name yyddd-hhmmss Bd Sm 13 Eb Ht Is K1 Kg Ny Oh On Kv Sh Sv Vm Wz Ys 0059+581 18114-173000| 96 92 228 380 380 362 645 158 645 | 0727-115 18114-173000| 388 25 59 570 570 133 236 217| 0119+115 18114-173641| 266 266 37| 0133+476 18114-173644| 25 25 25 | Last observations 0648-165 18115-171331| 178 195 195 | 3C274 18115-171332| 249 249 226 | 0119+115 18115-171440| 258 258 37| 0804+499 18115-171620| 256 531 531 | 0059+581 18115-171832| 197 196 197 | 0133+476 18115-171947| 40 144 471 471 | 0529+483 18115-172303| 78 222 60 25 184 222 184| 0415+398 18115-172452| 46 25 46 | =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 1.0 Min = 0.0 Max = 75.8 (Baseline K1-Sv on 0727-115) RMS = 4.0 Total time: 1436 minutes ( 23.9 hours). Key: Bd=BADARY Sm=CRIMEA 13=DSS13 Eb=EFLSBERG Ht=HART15M Is=ISHIOKA K1=KASHIM11 Kg=KOGANEI Ny=NYALES20 Oh=OHIGGINS On=ONSALA60 Kv=SEJONG Sh=SESHAN25 Sv=SVETLOE Vm=VERAMZSW Wz=WETTZELL Ys=YEBES40M Bd Sm 13 Eb Ht Is K1 Kg Ny Oh On Kv Sh Sv Vm Wz Ys Avg % obs. time: 33 52 28 11 45 56 60 64 49 4 54 64 47 38 58 45 50 45 % cal. time: 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 % slew time: 37 26 29 67 10 4 7 7 13 0 11 9 29 33 10 7 16 19 % idle time: 28 20 41 20 43 38 31 27 36 96 33 25 21 27 31 46 32 35 total # scans: 240 172 203 248 162 230 213 213 215 8 174 173 235 231 165 209 215 194 # scans/hour : 10 7 8 10 7 10 9 9 9 0 7 7 10 10 7 9 9 8 Avg scan (sec): 120 259 119 37 240 209 244 261 198 385 269 321 173 141 301 185 202 215 # data tracks: 16 16 32 16 16 16 16 16 16 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 32 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Total GB(M5): 461 713 774 148 622 769 831 889 680 49 748 889 649 521 795 620 696 639 # OF OBSERVATIONS BY BASELINE | Bd Sm 13 Eb Ht Is K1 Kg Ny Oh On Kv Sh Sv Vm Wz Ys Total ----------------------------------------------------------------------------------------------- Bd| 55 64 67 37 98 69 68 96 0 48 63 129 107 53 55 45 1054 Sm| 24 96 65 18 16 16 67 1 105 28 42 86 12 91 96 818 13| 48 12 72 45 45 85 2 48 29 54 64 41 59 59 751 Eb| 70 21 18 14 87 3 87 17 29 154 14 135 121 981 Ht| 23 17 19 27 7 50 19 50 53 12 61 76 598 Is| 133 149 55 0 20 102 166 33 77 23 17 1007 K1| 174 41 0 16 112 100 16 111 19 15 902 Kg| 34 0 14 120 113 15 109 16 12 918 Ny| 0 97 36 56 96 40 82 90 989 Oh| 1 0 1 1 0 1 5 22 On| 26 33 78 13 91 112 839 Kv| 97 28 97 23 18 815 Sh| 53 59 40 33 1055 Sv| 19 136 92 1031 Vm| 16 10 683 Wz| 119 967 Ys| 920 Number of 3-station scans: 323 Number of 4-station scans: 136 Number of 5-station scans: 95 Number of 6-station scans: 66 Number of 7-station scans: 57 Number of 8-station scans: 23 Number of 9-station scans: 13 Number of 10-station scans: 9 Number of 11-station scans: 7 Number of 13-station scans: 1 Number of 14-station scans: 3 Total number of scans: 733 Total number of obs: 7175 Total integrated obs-time: 1003268 Average obs-time: 139.8 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode for: BADARY CRIMEA EFLSBERG HART15M ISHIOKA KASHIM11 KOGANEI NYALES20 SEJONG SESHAN25 SVETLOE VERAMZSW WETTZELL YEBES40M 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: DSS13 Mode Tot.Rate Tot.BandW #BBC #bits Barrel Mk341:1 256 Mbits 64 MHz 14 2 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks 4.00 MHz 1 32(*1) 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 19.13 11.48 30.61 Recording mode for: 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 ===========================================================