IVS-T2053 (International VLBI Service - Terrestical Reference Frame Observations) 2008 Feb.05-06 doy 036-037 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 ) 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). Session Notes for session: t2053 =========================================================== Parameter values for experiment T2053 Experiment description: IVS-T2.053 Scheduler: IGGB/Mueskens Correlator: HAYSTACK Nominal start: 2008-036-17:30:00 Nominal end: 2008-037-17:30:01 Current yyyyddd: 2008036 (2008.10) ( 14502 MJD, TUES 5FEB.) Greenwich sidereal time: 2:30: 0.00 (17:30: 0 UT) Sun's RA and DEC: 21h 15.0m -15d 57.3 =========================================================== There are no observations for Kokee and Wettzell from 18:20 U.T. to 19:40 U.T. Kokee and Wettzell will participate in the intensive session during this 1.5 hour period. =========================================================== First observations Observation listing from file t2053.skd for experiment T2053 Source Start DURATIONS name yyddd-hhmmss 45 Hh Kb Kk Nt Ny Oh Sh Sv Tc Ts Wz 0552+398 08036-173000| 41 41 40 40 40 40 40 40| 1741-038 08036-173000| 40 652 652 517 | =========================================================== Last observations 0537-441 08037-165737| 87 225 225 | 1741-038 08037-170743| 40 40 | 0602+673 08037-170916| 209 264 250 264 89 121 200| 1958-179 08037-171011| 351 351 | OJ287 08037-171441| 40 44 40 40 44| =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 5.6 Min = 0.0 Max = 288.0 (Baseline Sh-Sv on 1958-179) RMS = 10.0 Total time: 1425 minutes ( 23.8 hours). Key: 45=DSS45 Hh=HARTRAO Kb=KASHIM34 Kk=KOKEE Nt=NOTO Ny=NYALES20 Oh=OHIGGINS Sh=SESHAN25 Sv=SVETLOE Tc=TIGO Ts=TSUKUB32 Wz=WETTZELL 45 Hh Kb Kk Nt Ny Oh Sh Sv Tc Ts Wz Avg % obs. time: 25 34 31 49 43 48 74 40 26 70 25 45 43 % cal. time: 1 1 2 1 1 1 1 2 2 1 2 1 1 % slew time: 35 29 37 13 32 16 9 29 42 4 14 8 23 % idle time: 37 35 29 37 22 33 15 28 30 24 58 44 33 total # scans: 234 136 284 203 213 235 111 258 266 116 296 233 215 # scans/hour : 9.9 5.7 12.0 8.5 9.0 9.9 4.7 10.9 11.2 4.9 12.5 9.8 9.1 Avg scan (sec): 93 216 93 205 175 176 569 134 82 517 73 165 207 Total GBytes: 411 542 499 767 688 767 1146 646 417 1091 415 713 675 Total GB(M5): 366 482 443 681 612 682 1019 575 370 970 369 633 600 Total number of tapes: 16.2 Total GBytes (M5) recorded: 7201.2 # OF OBSERVATIONS BY BASELINE | 45 Hh Kb Kk Nt Ny Oh Sh Sv Tc Ts Wz StnTotal -------------------------------------------------------------- 45|234 43 131 99 14 33 45 100 37 42 131 24 699 Hh| 136 20 0 65 35 52 21 54 28 23 57 398 Kb| 284 113 102 148 5 232 156 4 277 121 1309 Kk| 203 31 70 25 88 67 49 110 52 704 Nt| 213 148 25 112 175 19 111 172 974 Ny| 235 9 149 204 16 158 174 1144 Oh| 111 0 14 60 5 19 259 Sh| 258 154 0 239 126 1221 Sv| 266 15 167 200 1243 Tc| 116 5 22 260 Ts| 296 130 1356 Wz| 233 1097 Total # of scans, observations: 605 5332 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: DSS45 HARTRAO KOKEE NOTO NYALES20 SVETLOE TIGOCONC 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: 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: OHIGGINS SESHAN25 TSUKUB32 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 ===========================================================