IVS-T2065 (International VLBI Service - Terrestical Reference Frame Observations) 2009 Nov.17-18 doy 321-322 Institute for Geodesy and Geoinformation (IGG) of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2009 (master09.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 ======= Two new Vera stations will participate this time. From the following VLBI network stations we planed to transfer the recorded data via eVLBI Ai,Cc,Ts,Vm,Vs,Ny Session Notes for session: t2065 =========================================================== Experiment: T2065 Description IVS-T2.065 Scheduler: IGGB/Muesk Correlator: BONN Start: 2009-321-17:30:00 End: 2009-322-17:30:01 Current yyyyddd: 2009321 (2009.88) ( 15153 MJD, TUES 17NOV.) Greenwich sidereal time: 21:17: 0.00 (17:30: 0 UT) Sun's RA and DEC: 15h 32.7m -19d 8.1 =========================================================== There are no observations for Wettzell from 18:20 U.T. to 19:40 U.T. on doy 321. As well as on doy 322 from 16:20 U.T. to 17.30 U.T. Wettzell will participate in the both intensive sessions during this 1.5 hour period. =========================================================== First observations Observation listing from file t2065.skd for experiment T2065 Source Start DURATIONS name yyddd-hhmmss Ai Cc Sm Ny Oh Sh Tc Ts Ur Vs Vm Wz Ys 0133+476 09321-173000| 357 357 160 173 0 57 0 40 79 691 691 | 1921-293 09321-173000| 98 98 | 0537-441 09321-173655| 64 64 40 40 | 3C446 09321-173655| 111 111 84 66 40| Last observations 1741-038 09322-170825| 577 577 | 0133+476 09322-171506| 102 102 41 40 58 41| 4C39.25 09322-171821| 40 40 40 40 40 | 0229+131 09322-171859| 40 40| 2145+067 09322-172222| 40 40 40 40| 0537-441 09322-172324| 85 89 40 40 157 157 | 2243-123 09322-172518| 54 54 40| 1156+295 09322-172617| 41 41 40 | NRAO150 09322-172807| 83 83 | 2136+141 09322-172837| 40 40 40 40| End of listing. =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 2.8 Min = 0.0 Max = 53.3 (Baseline Oh-Ts on 3C446 ) RMS = 6.9 Total time: 1439 minutes ( 24.0 hours). Key: Ai=AIRA Cc=CHICHI10 Sm=CRIMEA Ny=NYALES20 Oh=OHIGGINS Sh=SESHAN25 Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Vs=VERAISGK Vm=VERAMZSW Wz=WETTZELL Ys=YEBES40M Ai Cc Sm Ny Oh Sh Tc Ts Ur Vs Vm Wz Ys Avg % obs. time: 62 65 40 40 52 30 55 21 38 71 63 33 26 46 % cal. time: 2 2 2 3 1 4 1 4 3 2 2 3 3 2 % slew time: 7 7 27 15 9 39 4 18 35 7 8 8 32 17 % idle time: 28 25 30 41 37 27 39 56 23 19 27 56 38 35 total # scans: 206 193 181 248 118 318 122 350 283 133 147 217 258 213 # scans/hour : 9 8 8 10 5 13 5 15 12 6 6 9 11 9 Avg scan (sec): 259 291 191 138 380 81 389 51 116 462 368 132 87 225 # data tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 Total GBytes: 959 1012 624 615 807 461 853 323 589 1106 973 515 402 711 Total GB(M5): 852 899 554 547 717 410 759 288 523 983 865 458 357 632 # of tapes : 0.1 0.1 1.0 1.0 1.0 1.0 1.0 0.1 1.0 0.1 0.1 1.0 1.0 Total GBytes (M5) recorded: 8212.3 # OF OBSERVATIONS BY BASELINE | Ai Cc Sm Ny Oh Sh Tc Ts Ur Vs Vm Wz Ys StnTotal --------------------------------------------------------------------------- Ai| 164 50 78 0 178 0 189 118 113 92 50 42 1074 Cc| 52 78 0 159 0 178 114 114 95 43 31 1028 Sm| 128 9 103 8 99 144 47 41 129 135 945 Ny| 2 163 13 168 192 60 65 163 162 1272 Oh| 0 91 5 4 0 0 14 37 162 Sh| 0 289 223 126 126 121 119 1607 Tc| 6 0 0 0 21 35 174 Ts| 208 128 142 119 115 1646 Ur| 93 90 154 148 1488 Vs| 92 45 35 853 Vm| 42 39 824 Wz| 179 1080 Ys| 1077 Total # of scans, observations: 608 6615 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 CRIMEA NYALES20 OHIGGINS SESHAN25 TIGOCONC TSUKUB32 URUMQI VERAISGK VERAMZSW WETTZELL YEBES40M 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 0.00 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 ===========================================================