IVS-T2070 (International VLBI Service - Terrestical Reference Frame Observations) 2010 Jul 20-21 doy 201-202 Institute for Geodesy and Geoinformation (IGG) of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2010 (master10.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 ======= eVLBI: data transfer from the following NetworkStations are planned: Ai,Cc,Ts,Kb Session Notes for session: t2070 =========================================================== Experiment: T2070 Description IVS-T2.070 Scheduler: IGGB/Muesk Correlator: see multi agency schedule 2010 Start: 2010-201-17:30:00 End: 2010-202-17:30:01 Current yyyyddd: 2010201 (2010.55) ( 15398 MJD, TUES 20JUL.) Greenwich sidereal time: 13:23: 0.00 (17:30: 0 UT) =========================================================== First observations Observation listing from file t2070.skd for experiment T2070 Source Start DURATIONS name yyddd-hhmmss Ai Bd Cc 13 Kb Sh Sm Tc Ts Ur 1803+784 10201-173000| 720 85 720 59 67 134 720 56 240| 4C39.25 10201-173251| 40 40 | Last observations 1334-127 10202-172105| 396 396 | 1921-293 10202-172433| 40 40 40 40 40 40| 2128-123 10202-172617| 40 40 40| 3C454.3 10202-172700| 40 40 40 40 | =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 4.2 Min = 0.0 Max = 120.0 (Baseline Tc-Ts on 0537-441) RMS = 8.5 Total time: 1438 minutes ( 24.0 hours). Key: Ai=AIRA Bd=BADARY Cc=CHICHI10 13=DSS13 Kb=KASHIM34 Sh=SESHAN25 Sm=CRIMEA Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Ai Bd Cc 13 Kb Sh Sm Tc Ts Ur Avg % obs. time: 65 21 65 43 23 31 44 45 20 38 40 % cal. time: 2 4 2 4 4 4 2 3 4 4 3 % slew time: 5 48 4 39 39 33 24 7 15 33 25 % idle time: 28 27 27 13 33 32 29 45 60 24 32 total # scans: 146 319 141 319 336 318 154 242 343 303 262 # scans/hour : 6 13 6 13 14 13 6 10 14 13 11 Avg scan (sec): 383 56 400 118 59 83 249 159 50 109 166 # data tracks: 16 16 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 16 Total GBytes: 1006 319 1016 675 356 478 690 692 309 594 614 Total GB(M5): 894 284 903 600 317 425 613 615 275 528 545 Total GBytes (M5) recorded: 5453.8 # OF OBSERVATIONS BY BASELINE | Ai Bd Cc 13 Kb Sh Sm Tc Ts Ur StnTotal ------------------------------------------------------------ Ai| 131 132 46 142 144 74 0 142 131 942 Bd| 123 85 294 293 128 0 298 291 1643 Cc| 47 137 135 73 1 138 123 909 13| 90 79 35 227 94 76 779 Kb| 301 121 12 334 279 1710 Sh| 125 1 302 284 1664 Sm| 16 121 127 820 Tc| 15 1 273 Ts| 282 1726 Ur| 1594 Number of 2-station scans: 244 Number of 3-station scans: 31 Number of 4-station scans: 33 Number of 5-station scans: 104 Number of 6-station scans: 65 Number of 7-station scans: 32 Number of 8-station scans: 72 Number of 9-station scans: 22 Total # of scans, observations: 603 6030 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA BADARY CHICHI10 CRIMEA DSS13 KASHIM34 SESHAN25 TIGOCONC TSUKUB32 URUMQI 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 ===========================================================