IVS-T2056 (International VLBI Service - Terrestical Reference Frame Observations) 2008 Jul,29-30 doy 211-212 Institute for Geodesy and Geoinformation (IGG) of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2008 (master08.txt) 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 20 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 40 sec. and the most recent source flux models are included. SNR goals are 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 20 min - using 63 source for improving the sky covorage (and some new astrometric sources / see $ASTROMETRIC ) COMMENT ======= Yebes is schedules in the tag-along mode! =========================================================== Parameter values for experiment T2056 Experiment description: IVS-T2.056 Scheduler: IGG-Bonn Correlator: TBD Nominal start: 2008-211-17:30:00 Nominal end: 2008-212-17:30:01 Current yyyyddd: 2008211 (2008.58) ( 14677 MJD, TUES 29JUL.) Greenwich sidereal time: 14: 0: 0.00 (17:30: 0 UT) Sun's RA and DEC: 8h 37.4m 18d 32.0 =========================================================== 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. =========================================================== First observations Observation listing from file t2056.skd for experiment T2056 Source Start DURATIONS name yyddd-hhmmss 13 Ft Kb Mc Nt Sh Sm Sv Tc Ur Wz Ys 0727-115 08211-173000| 40 338 338 | NRAO512 08211-173000| 40 40 41 62 72 40 72 50 | 0003-066 08211-173447| 40 40 40 | 3C274 08211-173506| 40 40 49 49 42 40| =========================================================== Last observations 0059+581 08212-171112| 47 47 44 40| 0537-441 08212-171522| 40 95 95 | 2145+067 08212-171547| 40 40 40 40 | 2128-123 08212-171728| 40 41 41 | 1923+210 08212-171812| 40 40 40 40 40| 0104-408 08212-171952| 40 40 | =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.8 Min = 0.0 Max = 42.4 (Baseline 13-Sm on 2145+067) RMS = 7.4 Total time: 1431 minutes ( 23.9 hours). Key: 13=DSS13 Ft=FORTLEZA Kb=KASHIM34 Mc=MEDICINA Nt=NOTO Sh=SESHAN25 Sm=CRIMEA Sv=SVETLOE Tc=TIGO Ur=URUMQI Wz=WETTZELL Ys=YEBES40M 13 Ft Kb Mc Nt Sh Sm Sv Tc Ur Wz Ys Avg % obs. time: 36 58 27 25 39 36 35 26 43 42 40 18 36 % cal. time: 3 2 3 3 3 3 2 3 1 3 2 2 3 % slew time: 29 23 29 31 31 25 29 41 3 23 7 35 26 % idle time: 31 17 40 39 26 35 32 28 51 32 49 44 36 total # scans: 223 142 260 266 224 261 188 263 119 226 212 209 216 # scans/hour : 9.4 6.0 10.9 11.2 9.4 10.9 7.9 11.0 5.0 9.5 8.9 8.8 9.1 Avg scan (sec): 140 349 90 82 149 119 162 86 311 158 161 74 156 Total GBytes: 562 891 421 391 600 560 479 409 667 644 615 277 543 Total GB(M5): 499 792 375 348 533 497 486 363 593 572 547 246 488 Total number of tapes: 20.7 Total GBytes (M5) recorded: 5852.4 # OF OBSERVATIONS BY BASELINE | 13 Ft Kb Mc Nt Sh Sm Sv Tc Ur Wz Ys StnTotal -------------------------------------------------------------- 13|223 90 63 83 63 46 27 84 96 40 60 66 718 Ft| 142 11 72 70 9 31 50 60 21 61 62 537 Kb| 260 114 81 228 82 135 5 163 89 83 1054 Mc| 266 208 105 143 218 23 123 192 187 1468 Nt| 224 86 132 172 24 105 180 165 1286 Sh| 261 99 130 0 189 92 82 1066 Sm| 188 142 7 120 127 114 1024 Sv| 263 13 149 179 161 1433 Tc| 119 0 22 19 269 Ur| 226 113 96 1119 Wz| 212 155 1270 Ys| 209 1190 Total # of scans, observations: 574 6217 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: CRIMEA Mode Tot.Rate Tot.BandW #chan #bits Barrel C 112.000 Mbits 56.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 2 14(*0) 28 270.00 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 channels recorded per sub-pass X S Total 8.000 6.000 14.000 Recording mode setup for: DSS13 MEDICINA NOTO SVETLOE TIGOCONC URUMQI WETTZELL YEBES40M Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 128.000 Mbits 64.000 MHz 14 1 16 Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 16(*2) 32 80.00 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 channels recorded per sub-pass X S Total 10.000 6.000 16.000 Recording mode setup for: FORTLEZA KASHIM34 Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 128.000 Mbits 64.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 16(*2) 32 135.00 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 channels recorded per sub-pass X S Total 10.000 6.000 16.000 Recording mode setup for: SESHAN25 Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 128.000 Mbits 64.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 4.00 MHz 1 16(*2) 32 80.00 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 channels recorded per sub-pass X S Total 10.000 6.000 16.000