IVS-T2062 (International VLBI Service - Terrestical Reference Frame Observations) 2009 Juni 23-24 doy 174-175 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 ======= 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 one period. Yebes will not be able to participate in this session because maser problems Sm was scheduled in tag-along mode, due to a Mark5B test. Session Notes for session: t2062 ----- Parameter listing -------------------------------------- Experiment: T2062 Description IVS-T2.062 Scheduler: IGGB/Muesk Correlator: BONN Start: 2009-174-17:30:00 End: 2009-175-17:30:01 Current yyyyddd: 2009174 (2009.48) ( 15006 MJD, TUES 23JUN.) Greenwich sidereal time: 11:38: 0.00 (17:30: 0 UT) Sun's RA and DEC: 6h 10.3m 23d 25.0 =========================================================== 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 t2062.skd for experiment T2062 Source Start DURATIONS name yyddd-hhmmss Ai Cc Sm 13 Nt Tc Ts Ur Wz Zc 1749+096 09174-173000| 393 393 187 103 40 97 128 56| Last observations 1611+343 09175-162634| 638 638 391 226 40 375 292 152| 0552+398 09175-163340| 40 116 116 99 87| 4C39.25 09175-163711| 40 40 40 40 | 0202+149 09175-163840| 231 231 | 4C39.25 09175-171229| 40 40 40 | 1128+385 09175-171448| 59 69 69 40| CTA26 09175-171609| 83 83 | OK290 09175-171714| 76 76 52| 0235+164 09175-171849| 40 40 | 1034-293 09175-172008| 40 40 | End of listing. =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 4.2 Min = 0.0 Max = 130.9 (Baseline 13-Nt on 1124-186) RMS = 9.1 Total time: 1431 minutes ( 23.9 hours). Key: Ai=AIRA Cc=CHICHI10 Sm=CRIMEA 13=DSS13 Nt=NOTO Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Wz=WETTZELL Zc=ZELENCHK Ai Cc Sm 13 Nt Tc Ts Ur Wz Zc Avg % obs. time: 70 71 18 28 30 37 15 32 37 21 36 % cal. time: 2 2 1 3 2 2 3 3 3 3 2 % slew time: 6 6 12 37 27 7 15 33 9 36 19 % idle time: 21 20 68 30 39 53 66 31 51 39 42 total # scans: 177 174 91 297 166 199 269 270 243 235 212 # scans/hour : 7 7 4 12 7 8 11 11 10 10 9 Avg scan (sec): 338 352 168 82 158 160 49 102 130 78 161 # data tracks: 16 16 14 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 16 Total GBytes: 1078 1104 240 440 471 572 239 496 569 330 554 Total GB(M5): 958 981 244 391 419 508 212 441 506 293 495 Total GBytes (M5) recorded: 4953.2 # OF OBSERVATIONS BY BASELINE | Ai Cc Sm 13 Nt Tc Ts Ur Wz Zc StnTotal ------------------------------------------------------------ Ai| 173 55 52 64 0 177 144 73 85 823 Cc| 55 51 64 0 174 141 73 85 816 Sm| 12 54 2 59 78 78 80 473 13| 49 165 118 62 56 42 607 Nt| 58 84 92 129 117 711 Tc| 9 1 38 27 300 Ts| 179 103 118 1021 Ur| 168 179 1044 Wz| 190 908 Zc| 923 Total # of scans, observations: 576 3813 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 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 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 NOTO TIGOCONC URUMQI WETTZELL YEBES40M ZELENCHK 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 ===========================================================