IVS-T2055 (International VLBI Service - Terrestical Reference Frame Observations) 2008 Jun,24-25 doy 176-177 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 ) Procedures ========== NO PREPASS TIME: There is no time allowed in the schedule for prepassing tapes. Therefore all tapes needed for this experiment must be pre-checked before the start of this experiment. CONDITIONING: Conditioning has to be done before recording with all used Mark 5 module(s)/disk package(s). ========================================================== Parameter values for experiment T2055 Experiment description: IVS-T2.055 Scheduler: IGGB/Mueskens Correlator: HAYSTACK Nominal start: 2008-176-17:30:00 Nominal end: 2008-177-17:30:01 Current yyyyddd: 2008176 (2008.48) ( 14642 MJD, TUES 24JUN.) Greenwich sidereal time: 11:42: 0.00 (17:30: 0 UT) Sun's RA and DEC: 6h 15.5m 23d 23.4 =========================================================== 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 one hour period. =========================================================== First observations Observation listing from file t2055.skd for experiment T2055 Source Start DURATIONS name yyddd-hhmmss 6a Ai Cc Ho Kb Ma Mh Ny Pa Sh Tc Ts Ur Wz 0104-408 08176-173000| 389 139 389 | NRAO512 08176-173000| 56 720 720 47 257 682 356 113 40 171 212| =========================================================== Last observations 1958-179 08177-170645| 720 720 183 56 55 139 48 219 | OJ287 08177-170822| 40 195 282 282 165| 2145+067 08177-171125| 296 40 44 40 40 296 | 1034-293 08177-171257| 40 67 67| 2243-123 08177-171409| 102 102 65 85 | 1124-186 08177-171455| 40 107 107 103| 1923+210 08177-171721| 70 70 40 | 1255-316 08177-171740| 40 40 40| 2255-282 08177-171815| 40 40 | 1741-038 08177-171849| 40 40 | 0955+476 08177-171907| 115 115 | 1144-379 08177-171943| 40 40 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.5 Min = 0.0 Max = 52.4 (Baseline Kb-Ma on 0607-157) RMS = 7.6 Total time: 1431 minutes ( 23.9 hours). Key: 6a=DSS65A Ai=AIRA Cc=CHICHI10 Ho=HOBART26 Kb=KASHIM34 Ma=MATERA Mh=METSAHOV Ny=NYALES20 Pa=PARKES64 Sh=SESHAN25 Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Wz=WETTZELL 6a Ai Cc Ho Kb Ma Mh Ny Pa Sh Tc Ts Ur Wz Avg % obs. time: 19 65 67 37 23 44 47 44 19 33 30 20 45 35 38 % cal. time: 3 2 1 2 3 3 2 2 2 3 1 3 2 2 2 % slew time: 52 4 4 27 35 18 24 10 52 28 4 13 23 7 22 % idle time: 26 28 27 32 37 34 26 43 26 34 64 62 29 54 38 total # scans: 239 136 126 204 283 217 155 156 197 257 101 293 209 214 199 # scans/hour : 10 6 5 9 12 9 6 7 8 11 4 12 9 9 8 Avg scan (sec): 68 412 455 155 70 173 262 244 81 111 257 60 185 141 190 Total GBytes: 292 1008 1032 570 356 674 730 684 288 514 467 314 696 543 583 Total GB(M5): 259 896 917 507 317 599 649 608 256 457 415 279 618 483 519 Total number of tapes: 16.5 Total GBytes (M5) recorded: 7260.5 # OF OBSERVATIONS BY BASELINE | 6a Ai Cc Ho Kb Ma Mh Ny Pa Sh Tc Ts Ur Wz StnTotal -------------------------------------------------------------------------------- 6a| 12 12 1 56 171 109 97 0 54 51 56 74 166 859 Ai| 102 66 126 24 25 27 58 124 0 128 77 22 791 Cc| 64 113 22 26 27 65 104 0 116 71 20 742 Ho| 94 8 1 3 154 90 36 97 46 3 663 Kb| 65 56 75 99 221 3 274 145 73 1400 Ma| 120 98 0 73 22 68 96 176 943 Mh| 114 0 63 4 59 80 122 779 Ny| 3 73 3 76 86 114 796 Pa| 88 22 102 44 0 635 Sh| 0 225 158 75 1348 Tc| 5 0 16 162 Ts| 147 72 1425 Ur| 97 1121 Wz| 956 Total # of scans, observations: 642 6310 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 HOBART26 SESHAN25 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: DSS65A MATERA NYALES20 TIGOCONC URUMQI WETTZELL 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: 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 Recording mode setup for: METSAHOV Mode Tot.Rate Tot.BandW #chan #bits Barrel VLBA1:2 128.000 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: PARKES 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) 32 135.00 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 ===========================================================