IVS-T2057 (International VLBI Service - Terrestical Reference Frame Observations) 2008 Sept.23-24 doy 267-268 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 ======= Yebes is schedules in the tag-along mode! DSS13 stop with observations at 268-14:30 UT Wettzell time-slot from 18:20 to 19:40 for INTensive =========================================================== Parameter values for experiment T2057 Experiment description: IVS-T2.057 Scheduler: IGG-Bonn Nominal start: 2008-267-17:30:00 Nominal end: 2008-268-17:30:01 Current yyyyddd: 2008267 (2008.73) ( 14733 MJD, TUES 23SEP.) Greenwich sidereal time: 17:41: 0.00 (17:30: 0 UT) Sun's RA and DEC: 12h 3.9m 0d 25.1 =========================================================== First observations Observation listing from file t2057.skd for experiment T2057 Source Start DURATIONS name yyddd-hhmmss 13 Ft Ho Mc On Sh Sm Sv Tc Ur Wz Ys 0059+581 08267-173000| 192 117 487 487 386 90 328 238 | 1057-797 08267-173000| 720 720 719 | 0528+134 08267-174030| 40 40 | 1958-179 08267-174030| 42 146 146 46 139 91 40| =========================================================== Last observations 0727-115 08268-170513| 106 106 | NRAO512 08268-170551| 546 43 223 386 62 546 96 | 1739+522 08268-170835| 40 79 40 79 46| 1606+106 08268-171144| 40 78 42 78 | 0106+013 08268-171231| 177 177 | 1308+326 08268-171433| 46 46 45| 0402-362 08268-171729| 248 248 | =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.9 Min = 0.0 Max = 160.0 (Baseline Ho-Sv on 1958-179) RMS = 8.3 Total time: 1432 minutes ( 23.9 hours). Key: 13=DSS13 Ft=FORTLEZA Ho=HOBART26 Mc=MEDICINA On=ONSALA60 Sh=SESHAN25 Sm=CRIMEA Sv=SVETLOE Tc=TIGO Ur=URUMQI Wz=WETTZELL Ys=YEBES40M 13 Ft Ho Mc On Sh Sm Sv Tc Ur Wz Ys Avg % obs. time: 28 56 33 23 49 36 36 22 52 44 37 16 36 % cal. time: 3 2 2 3 2 3 2 3 2 3 3 2 2 % slew time: 29 24 20 38 13 23 28 43 5 24 8 39 25 % idle time: 39 18 44 34 34 37 32 31 40 28 51 41 36 total # scans: 215 143 133 286 185 229 188 277 149 223 234 204 205 # scans/hour : 9.0 6.0 5.6 12.0 7.8 9.6 7.9 11.6 6.2 9.3 9.8 8.5 8.6 Avg scan (sec): 113 336 216 71 230 134 167 69 301 170 136 67 166 Total GBytes: 437 866 518 363 765 552 494 343 807 683 571 245 554 Total GB(M5): 388 770 460 323 680 491 502 305 717 607 508 218 497 Total GBytes (M5) recorded: 5967.6 # OF OBSERVATIONS BY BASELINE | 13 Ft Ho Mc On Sh Sm Sv Tc Ur Wz Ys StnTotal -------------------------------------------------------------- 13|215 73 25 88 54 44 23 84 84 49 69 68 661 Ft| 143 11 75 60 11 33 49 57 27 62 56 514 Ho| 133 4 2 66 6 7 56 28 4 4 213 Mc| 286 160 111 151 233 21 142 223 186 1394 On| 185 91 113 164 17 118 149 117 1045 Sh| 229 91 141 0 172 108 83 918 Sm| 188 156 8 131 136 106 954 Sv| 277 14 166 194 168 1376 Tc| 149 0 17 20 294 Ur| 223 135 101 1069 Wz| 234 151 1248 Ys| 204 1060 Total # of scans, observations: 587 5373 =========================================================== Recording mode Name Code EUR2-SX SX 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 MEDICINA ONSALA60 SVETLOE TIGOCONC URUMQI WETTZELL YEBES40M 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 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 Recording mode setup for: HOBART26 SESHAN25 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 ===========================================================