IVS-T2059 (International VLBI Service - Terrestical Reference Frame Observations) 2008 Dez.16-17 doy 351-352 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 ======= DSS45 observed from 317-00:15 to 317-17:30 Session Notes for session: t2059 =========================================================== Parameter values for experiment T2059 Experiment description: IVS-T2.059 Scheduler: IGGB/Mueskens Correlator: see master08.txt Nominal start: 2008-351-17:30:00 Nominal end: 2008-352-17:30:01 Current yyyyddd: 2008351 (2008.96) ( 14817 MJD, TUES 16DEC.) Greenwich sidereal time: 23:12: 0.00 (17:30: 0 UT) Sun's RA and DEC: 17h 38.8m -23d 20.9 =========================================================== First observations Observation listing from file t2059.skd for experiment T2059 Source Start DURATIONS name yyddd-hhmmss 13 Ai Cc Ho Mc Mh Ny Sm Tc Ts Ur Wz 0528+134 08351-173000| 437 437 70 435 207 40 110 120| 1057-797 08351-173000| 57 57 | 2145+067 08351-173431| 40 138 138 74| 0955+476 08351-173550| 40 101 40 101 | Last observations 0823+033 08352-171321| 420 98 420 | 0552+398 08352-171417| 40 40 40 40 40| OK290 08352-171558| 178 178 | OJ287 08352-171622| 185 185 | 1739+522 08352-171851| 40 40 40| 1749+096 08352-172134| 90 90 | =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 4.1 Min = 0.0 Max = 90.0 (Baseline Mc-Ny on 1741-038) RMS = 8.5 Total time: 1433 minutes ( 23.9 hours). Key: 13=DSS13 Ai=AIRA Cc=CHICHI10 Ho=HOBART26 Mc=MEDICINA Mh=METSAHOV Ny=NYALES20 Sm=CRIMEA Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Wz=WETTZELL 13 Ai Cc Ho Mc Mh Ny Sm Tc Ts Ur Wz Avg % obs. time: 42 71 69 43 27 48 46 35 41 28 46 36 44 % cal. time: 3 2 2 2 3 2 2 2 2 4 3 3 2 % slew time: 32 4 4 25 34 26 12 26 6 17 24 9 19 % idle time: 23 22 24 28 35 23 39 36 50 50 26 51 34 total # scans: 264 150 147 180 268 157 184 180 174 341 224 251 210 # scans/hour : 11.1 6.3 6.2 7.5 11.2 6.6 7.7 7.5 7.3 14.3 9.4 10.5 8.8 Avg scan (sec): 136 409 404 206 86 262 216 169 204 70 177 125 204 Total GBytes: 644 1105 1068 668 417 739 715 480 640 432 715 563 682 Total GB(M5): 573 982 949 594 370 657 635 488 569 384 636 500 612 Total GBytes (M5) recorded: 7338.2 # OF OBSERVATIONS BY BASELINE | 13 Ai Cc Ho Mc Mh Ny Sm Tc Ts Ur Wz StnTotal -------------------------------------------------------------- 13|264 35 38 36 54 37 58 17 121 98 34 52 580 Ai| 150 105 67 24 31 35 10 0 142 94 24 567 Cc| 147 65 19 29 30 10 0 132 75 19 522 Ho| 180 5 1 3 4 54 111 55 3 404 Mc| 268 110 112 149 25 98 94 223 913 Mh| 157 113 90 4 61 75 123 674 Ny| 184 74 5 88 81 120 719 Sm| 180 5 51 80 145 635 Tc| 174 7 1 17 239 Ts| 341 160 92 1040 Ur| 224 98 847 Wz| 251 916 Total # of scans, observations: 730 4028 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA CHICHI10 HOBART26 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 MEDICINA 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: 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 ===========================================================