IVS-T2058 (International VLBI Service - Terrestical Reference Frame Observations) 2008 Nov.11-12 doy 316-317 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 ) COMMENT ======= Kokee time-slot from 18:20 to 19:40 for INTensive DSS45 observed from 317-00:15 to 317-17:30 Session Notes for session: t2058.skd =========================================================== Parameter values for experiment T2058 Experiment description: IVS-T2.058 Scheduler: IGGB/Mueskens Correlator: see multi agency schedule Nominal start: 2008-316-17:30:00 Nominal end: 2008-317-17:30:01 Current yyyyddd: 2008316 (2008.87) ( 14782 MJD, TUES 11NOV.) Greenwich sidereal time: 20:54: 0.00 (17:30: 0 UT) Sun's RA and DEC: 15h 9.0m -17d 39.6 =========================================================== There are no observations for Kokee 18:20 U.T. to 19:40 U.T. Kokee will participate in the intensive session during this 1.5 hour period. =========================================================== First observations Observation listing from file t2058.skd for experiment T2058 Source Start DURATIONS name yyddd-hhmmss 45 Ai Bd Cc Ft Kb Kk Ma Oh On Tc Ts Ur 0552+398 08316-173000| 162 40 162 40 160 160 134 40 49| 1921-293 08316-173000| 62 62 | 1424-418 08316-173325| 720 720 | =========================================================== Last observations NRAO512 08317-170417| 529 529 720 720 | CTA26 08317-170503| 42 720 62 720 43 40 212| 0537-441 08317-170802| 40 488 488 401 | 0607-157 08317-171149| 40 40 71 71| OJ287 08317-171438| 40 50 98 98| 1741-038 08317-171533| 53 53 | 1034-293 08317-171736| 40 40 | 1308+326 08317-171942| 65 65 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.3 Min = 0.0 Max = 110.8 (Baseline Kb-On on 2128-123) RMS = 8.0 Total time: 1431 minutes ( 23.9 hours). Key: 45=DSS45 Ai=AIRA Bd=BADARY Cc=CHICHI10 Ft=FORTLEZA Kb=KASHIM34 Kk=KOKEE Ma=MATERA Oh=OHIGGINS On=ONSALA60 Tc=TIGO Ts=TSUKUB32 Ur=URUMQI 45 Ai Bd Cc Ft Kb Kk Ma Oh On Tc Ts Ur Avg % obs. time: 22 65 25 65 52 25 42 42 49 48 55 22 45 43 % cal. time: 2 2 3 2 2 3 2 2 1 2 1 3 3 2 % slew time: 26 4 38 4 23 39 13 18 11 13 4 14 24 18 % idle time: 49 28 33 28 23 32 41 37 38 37 39 59 28 37 total # scans: 176 153 251 141 137 288 198 192 115 173 112 298 220 188 # scans/hour : 7.4 6.4 10.5 5.9 5.7 12.1 8.3 8.1 4.8 7.3 4.7 12.5 9.2 7.9 Avg scan (sec): 106 366 85 395 325 75 182 187 365 236 419 63 174 228 Total GBytes: 337 1007 384 1003 801 387 650 648 756 736 844 338 691 660 Total GB(M5): 300 895 341 891 712 344 578 576 672 654 751 300 614 587 Total GBytes (M5) recorded: 7628.7 # OF OBSERVATIONS BY BASELINE | 45 Ai Bd Cc Ft Kb Kk Ma Oh On Tc Ts Ur StnTotal ------------------------------------------------------------------ 45|176 80 68 79 5 112 91 9 34 10 19 114 59 680 Ai| 153 95 114 0 138 68 22 0 30 0 142 90 779 Bd| 251 88 9 189 82 74 0 82 0 198 186 1071 Cc| 141 0 129 73 22 0 29 0 132 88 754 Ft| 137 2 20 67 54 43 66 3 9 278 Kb| 288 127 49 5 60 1 276 159 1247 Kk| 198 15 23 26 33 129 69 756 Ma| 192 15 140 17 55 71 556 Oh| 115 14 67 7 2 221 On| 173 17 61 76 588 Tc| 112 1 0 221 Ts| 298 159 1277 Ur| 220 968 Total # of scans, observations: 634 4698 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 OHIGGINS 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: BADARY DSS45 KOKEE MATERA ONSALA60 TIGOCONC URUMQI 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: FORTLEZA 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 =========================================================== StatWt Abs 10.00 TFTFT FFFTF TFF ===========================================================