IVS-T2085 (International VLBI Service - Terrestical Reference Frame Observations) 2012 Sept.11-12 doy 255-256 Institute for Geodesy and Geoinformation (IGGB) of the University of Bonn, Germany Nominal Start Time: 2012:255:17h30 UT Nominal End Time: 2012:256:17h30 UT Duration: 24.0 hr Correlator: BONN skedfile: t2085.skd Participating stations: =========== AIRA CHICHI10 CRIMEA HARTRAO HOBART12 KSHIM11 KATH12M KUNMING KOGANEI NOTO NYALES20 ONSALA60 SESHAN25 SVETLOE TSUKUB32 URUMQI VERAISGK VERAMZSW WETTZELL YARRA12M 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 ) Session Notes for session: t2085 =========================================================== ----- Parameter listing -------------------------------------- Experiment: T2085 Description IVS-T2.085 Scheduler: IGGB/Muesk Correlator: BONN Start: 2012-255-17:30:00 End: 2012-256-17:30:01 Current yyyyddd: 2012255 (2012.70) ( 16182 MJD, TUES 11SEP.) Greenwich sidereal time: 16:54: 0.00 (17:30: 0 UT) Sun's RA and DEC: 11h 20.9m 4d 12.4 =========================================================== 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 ./t2085.skd for experiment T2085 Source Start DURATIONS name yyddd-hhmmss Ai Cc Sm Hh Hb K1 Ke Km Kg Nt Ny On Pa Sh Sv Ts Ur Vs Vm Wz Yg 3C446 12255-173000| 715 715 467 234 510 314 44 416 157 458 68 53 26 115 444 137 | 0537-441 12255-173925| 21 26 13 26| 4C39.25 12255-173941| 119 65 35 119 19 13 108 66 | Last observations NRAO150 12256-171804| 593 593 242 242 31 593 | 2052-474 12256-172113| 198 199 199| 2136+141 12256-172307| 363 363 | 0104-408 12256-172312| 333 333 | 2145+067 12256-172341| 94 45 71 99 29 157 157 16 96 33 54 | 0727-115 12256-172520| 105 105 | 1921-293 12256-172659| 13 13 13 13 | 2234+282 12256-172713| 117 127 123 46 77 127 | 1622-253 12256-172851| 53 53 26 32 | =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 2.2 Min = 0.0 Max = 68.6 (Baseline Pa-Sv on 0106+013) RMS = 5.8 Total time: 1440 minutes ( 24.0 hours). Key: Ai=AIRA Cc=CHICHI10 Sm=CRIMEA Hh=HARTRAO Hb=HOBART12 K1=KASHIM11 Ke=KATH12M Km=KUNMING Kg=KOGANEI Nt=NOTO Ny=NYALES20 On=ONSALA60 Pa=PARKES64 Sh=SESHAN25 Sv=SVETLOE Ts=TSUKUB32 Ur=URUMQI Vs=VERAISGK Vm=VERAMZSW Wz=WETTZELL Yg=YARRA12M Ai Cc Sm Hh Hb K1 Ke Km Kg Nt Ny On Pa Sh Sv Ts Ur Vs Vm Wz Yg Avg % obs. time: 56 56 38 26 51 53 57 16 44 23 30 41 18 26 12 14 31 57 43 21 47 36 % cal. time: 2 2 2 2 2 2 2 3 3 2 3 2 2 3 3 4 3 1 2 2 2 2 % slew time: 5 5 31 30 5 8 6 34 9 31 15 13 49 33 37 18 29 6 7 8 5 19 % idle time: 36 36 28 41 42 36 35 46 43 42 52 43 30 37 48 63 36 34 47 67 45 43 total # scans: 166 160 190 130 148 197 171 295 244 207 220 173 170 281 232 338 231 115 130 215 141 197 # scans/hour : 7 7 8 5 6 8 7 12 10 9 9 7 7 12 10 14 10 5 5 9 6 8 Avg scan (sec): 290 302 172 174 296 232 287 46 156 96 116 206 93 79 44 37 115 431 287 86 288 182 # data tracks: 16 16 16 16 16 16 16 16 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 16 16 16 16 16 16 16 16 Total GBytes: 868 870 588 408 790 821 884 244 684 358 460 641 284 397 185 223 480 892 673 334 732 563 Total GB(M5): 771 773 523 363 702 730 786 217 608 318 408 570 252 353 164 198 427 793 598 297 651 500 Total GBytes (M5) recorded: 10503.1 Total # of scans, observations: 712 16068 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 CRIMEA HARTRAO HOBART12 KASHIM11 KATH12M KUNMING KOGANEI NOTO NYALES20 ONSALA60 PARKES SESHAN25 SVETLOE TSUKUB32 URUMQI VERAISGK VERAMZSW WETTZELL YARRA12M 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 ===========================================================