IVS-T2050 (International VLBI Service - Terrestical Reference Frame Observations) 2007 May 15/16 doy 135/136 Institute for Geodesy and Geoinformation (IGG) of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2007 (master07.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 ) Procedures ========== NO PREPASS TIME: There is no time allowed in the schedule for prepassing tapes. Therefore all tapes needed for this experiment must be pre-checked before the start of this experiment. CONDITIONING: Conditioning has to be done before recording with all used Mark 5 module(s)/disk package(s). =========================================================== Parameter values for experiment T2050 Experiment description: IVS-T2.050 Scheduler: IGG BONN/Mueskens Correlator: see master07.txt file Nominal start: 2007-135-17:30:00 Nominal end: 2007-136-17:30:01 Current yyyyddd: 2007135 (2007.37) ( 14236 MJD, TUES 15MAY.) Greenwich sidereal time: 9: 2: 0.00 (17:30: 0 UT) Sun's RA and DEC: 3h 28.6m 18d 53.8 =========================================================== There are no observations from 135-1730 to 136-0020 U.T. for DSS45 due to SGP experiements. =========================================================== First observations Observation listing from file t2050.skd for experiment T2050 Source Start DURATIONS name yyddd-hhmmss Bd 13 45 Ft Kb Ma Mc Mh Nt Ny Gg Sv Ur Wf Wz 0552+398 07135-173000| 40 720 298 108 720 213 189 720 116 160 229| 0059+581 07135-173721| 40 40 40 40 40 40 40 40 70 70 40| =========================================================== Last observations Source Start DURATIONS 0823+033 07136-171351| 239 91 239 180 209 95 193| 0003-066 07136-171436| 169 305 305 | 1519-273 07136-171443| 40 40 40 | 0727-115 07136-171622| 40 40 | 1417+385 07136-171723| 40 40 | 0743+259 07136-171753| 84 84 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.6 Min = 0.0 Max = 49.7 (Baseline 45-Nt on 0552+398) RMS = 7.3 Total time: 1429 minutes ( 23.8 hours). Key: Bd=BADARY 13=DSS13 45=DSS45 Ft=FORTLEZA Kb=KASHIM34 Ma=MATERA Mc=MEDICINA Mh=METSAHOV Nt=NOTO Ny=NYALES20 Gg=ORION_5M Sv=SVETLOE Ur=URUMQI Wf=WESTFORD Wz=WETTZELL Bd 13 45 Ft Kb Ma Mc Mh Nt Ny Gg Sv Ur Wf Wz Avg % obs. time: 27 33 15 41 29 45 22 51 34 40 53 23 50 47 39 37 % cal. time: 3 3 2 1 3 2 3 2 3 3 1 3 2 3 3 2 % slew time: 37 26 16 22 34 18 30 25 31 14 2 39 20 10 8 23 % idle time: 32 37 66 34 33 34 44 21 32 42 43 34 27 40 50 38 total # scans: 241 265 130 128 242 213 260 149 230 224 100 258 192 217 237 205 # scans/hour : 10.1 11.1 5.5 5.4 10.2 8.9 10.9 6.3 9.7 9.4 4.2 10.8 8.1 9.1 10.0 8.6 Avg scan (sec): 95 106 98 277 103 180 72 295 127 154 452 75 223 184 140 171 Total GBytes: 412 506 230 638 450 691 338 791 527 620 813 351 771 719 597 563 Total GB(M5): 366 450 204 567 400 614 300 703 468 551 723 312 685 639 530 501 # of tapes : 0.6 0.9 0.4 4.1 3.0 1.1 0.6 1.4 0.9 1.0 1.4 0.6 1.3 1.2 1.0 Total number of tapes: 19.5 Total GBytes (M5) recorded: 7512.4 # OF OBSERVATIONS BY BASELINE | Bd 13 45 Ft Kb Ma Mc Mh Nt Ny Gg Sv Ur Wf Wz StnTotal -------------------------------------------------------------------------- Bd|241 86 43 26 175 126 162 105 131 150 12 177 162 81 151 1587 13| 265 51 61 97 66 81 50 64 93 78 91 60 145 79 1102 45| 130 7 78 15 17 13 14 22 10 23 33 11 17 354 Ft| 128 13 55 59 41 61 44 35 44 27 78 56 607 Kb| 242 90 114 72 86 113 13 129 132 69 105 1286 Ma| 213 202 121 199 153 23 176 129 101 192 1648 Mc| 260 133 211 180 27 224 132 110 225 1877 Mh| 149 115 120 21 140 102 73 134 1240 Nt| 230 154 25 182 119 100 194 1655 Ny| 224 24 190 126 119 187 1675 Gg| 100 24 9 71 27 399 Sv| 258 140 110 211 1861 Ur| 192 74 134 1379 Wf| 217 111 1253 Wz| 237 1823 Total # of scans, observations: 593 9873 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: BADARY DSS13 DSS45 MATERA MEDICINA NOTO NYALES20 GGAO7108 SVETLOE URUMQI WESTFORD WETTZELL 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: METSAHOV Mode Tot.Rate Tot.BandW #chan #bits Barrel VLBA1:2 128.000 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 =========================================================== Tape types ID Station Tape length Density Passes Bd BADARY 17400feet (Thin ) 56250 (HIGH ) 14 13 DSS13 17400feet (Thin ) 56250 (HIGH ) 14 45 DSS45 17400feet (Thin ) 56250 (HIGH ) 14 Ft FORTLEZA 8700feet (Thick ) 33333 (Low ) 14 Kb KASHIM34 8700feet (Thick ) 33333 (Low ) 12 Ma MATERA 17400feet (Thin ) 56250 (HIGH ) 14 Mc MEDICINA 17400feet (Thin ) 56250 (HIGH ) 14 Mh METSAHOV 17400feet (Thin ) 56700 (HIGH ) 14 Nt NOTO 17400feet (Thin ) 56250 (HIGH ) 14 Ny NYALES20 17400feet (Thin ) 56250 (HIGH ) 14 Gg GGAO7108 17400feet (Thin ) 56250 (HIGH ) 14 Sv SVETLOE 17400feet (Thin ) 56250 (HIGH ) 14 Ur URUMQI 17400feet (Thin ) 56250 (HIGH ) 14 Wf WESTFORD 17400feet (Thin ) 56250 (HIGH ) 14 Wz WETTZELL 17400feet (Thin ) 56250 (HIGH ) 14 ===========================================================