IVS-T2066 (International VLBI Service - Terrestical Reference Frame Observations) 2009 Dec.15-16 doy 349-350 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,Kb Session Notes for session: t2066 =========================================================== Experiment: T2066 Description IVS-T2.066 Scheduler: IGGB/Muesk Correlator: BONN Start: 2009-349-17:30:00 End: 2009-350-17:30:01 Current yyyyddd: 2009349 (2009.96) ( 15181 MJD, TUES 15DEC.) Greenwich sidereal time: 23: 7: 0.00 (17:30: 0 UT) Sun's RA and DEC: 17h 33.3m -23d 17.8 =========================================================== 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 t2066.skd for experiment T2066 Source Start DURATIONS name yyddd-hhmmss 13 Ai Cc Kb Mc Sm Tc Ts Ur Vs Vm Wz Ys 0552+398 09349-173000| 189 234 40 49 234 40 52 347 347 | 1622-253 09349-173000| 159 159 | 1611+343 09349-173329| 124 245 245 94| =========================================================== Last observations 0727-115 09350-171645| 274 282 40 40 72 502 502 | 1128+385 09350-172039| 40 40 40 40 | 0537-441 09350-172203| 58 58 | 3C446 09350-172244| 40 114 114 68 40| 0607-157 09350-172337| 97 97 | NRAO150 09350-172418| 90 90 76 | 2113+293 09350-172450| 40 40 40| 1739+522 09350-172650| 147 147 | 2145+067 09350-172654| 40 141 141 75 40| 0743+259 09350-172755| 114 67 114 | 2209+236 09350-172825| 40 40| End of listing. =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 3.1 Min = 0.0 Max = 180.0 (Baseline Tc-Ur on 3C446 ) RMS = 7.4 Total time: 1439 minutes ( 24.0 hours). Key: 13=DSS13 Ai=AIRA Cc=CHICHI10 Kb=KASHIM34 Mc=MEDICINA Sm=CRIMEA Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Vs=VERAISGK Vm=VERAMZSW Wz=WETTZELL Ys=YEBES40M 13 Ai Cc Kb Mc Sm Tc Ts Ur Vs Vm Wz Ys Avg % obs. time: 29 59 59 22 26 36 36 20 33 68 64 35 28 40 % cal. time: 3 2 2 4 3 2 2 4 3 2 2 3 3 3 % slew time: 36 7 7 47 34 29 5 17 30 8 8 8 30 21 % idle time: 30 31 31 26 36 31 55 59 33 22 26 52 38 37 total # scans: 266 210 196 327 277 187 170 336 261 135 137 241 267 231 # scans/hour : 11 9 8 14 12 8 7 14 11 6 6 10 11 10 Avg scan (sec): 95 242 259 58 81 166 184 50 108 434 400 127 90 175 # 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: 453 914 914 341 401 559 563 305 507 1055 987 551 432 614 Total GB(M5): 403 812 813 303 357 497 501 271 450 938 877 489 384 546 # of tapes : 1.0 0.1 0.1 0.1 1.0 1.0 1.0 0.1 1.0 0.1 0.1 1.0 1.0 Total GBytes (M5) recorded: 7095.4 # OF OBSERVATIONS BY BASELINE | 13 Ai Cc Kb Mc Sm Tc Ts Ur Vs Vm Wz Ys StnTotal --------------------------------------------------------------------------- 13| 65 63 114 69 20 133 115 63 44 56 58 75 875 Ai| 157 185 50 48 0 188 120 111 100 55 43 1122 Cc| 179 46 48 0 180 110 106 94 52 35 1070 Kb| 116 90 5 325 186 126 131 105 93 1655 Mc| 151 53 123 151 47 49 219 234 1308 Sm| 14 95 136 49 43 144 132 970 Tc| 4 1 0 0 40 72 322 Ts| 192 128 133 110 100 1693 Ur| 90 87 140 124 1400 Vs| 95 47 38 881 Vm| 46 40 874 Wz| 187 1203 Ys| 1173 Total # of scans, observations: 649 7273 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 CRIMEA DSS13 KASHIM34 MEDICINA 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 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 3) S-band (margin 3) 13 Ai Cc Kb Mc Sm Tc Ts Ur Vs Vm Wz 13 Ai Cc Kb Mc Sm Tc Ts Ur Vs Vm Wz Ai 21 Ai 22 Cc 21 21 Cc 22 22 Kb 25 21 21 Kb 25 22 22 Mc 25 21 21 25 Mc 25 22 22 25 Sm 25 21 21 25 25 Sm 25 22 22 25 25 Tc 19 19 19 19 19 19 Tc 20 20 20 20 20 20 Ts 25 21 21 25 25 25 19 Ts 25 22 22 25 25 25 20 Ur 25 21 21 25 25 25 19 25 Ur 25 22 22 25 25 25 20 25 Vs 23 21 21 23 23 23 19 23 23 Vs 20 20 20 20 20 20 20 20 20 Vm 23 21 21 23 23 23 19 23 23 23 Vm 20 20 20 20 20 20 20 20 20 20 Wz 25 21 21 25 25 25 19 25 25 23 23 Wz 25 22 22 25 25 25 20 25 25 20 20 Ys 25 21 21 25 25 25 19 25 25 23 23 25 Ys 25 22 22 25 25 25 20 25 25 20 20 25