IVS-T2071 (International VLBI Service - Terrestical Reference Frame Observations) 2010 Sept.21-22 doy 264-265 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 ) Session Notes for session: t2071 =========================================================== Experiment: T2071 Description IVS-T2.071 Scheduler: IGGB/Muesk Correlator: HAYSTACK Start: 2010-264-17:30:00 End: 2010-265-17:30:01 Current yyyyddd: 2010264 (2010.72) ( 15461 MJD, TUES 21SEP.) Greenwich sidereal time: 17:31: 0.00 (17:30: 0 UT) Sun's RA and DEC: 11h 54.9m 0d 32.9 =========================================================== First observations Observation listing from file t2071.skd for experiment T2071 Source Start DURATIONS name yyddd-hhmmss 13 Ai Bd Cc Kb Mh On Sm Tc Ur Vm Vs Zc 3C446 10264-173000| 318 40 318 40 198 191 125 67 563 563 40| 0727-115 10264-173402| 40 82 82 | Last observations 2145+067 10265-171621| 40 149 720 720 383 72 720 51| 1128+385 10265-171753| 207 207 | 2128-123 10265-171849| 588 61 195 588 135| 2201+315 10265-172405| 40 40| 0642+449 10265-172507| 40 77 191 46 191 | 2136+141 10265-172628| 40 40| 0955+476 10265-172806| 40 40 40 | 1921-293 10265-172915| 40 40| End of listing. =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 2.7 Min = 0.0 Max = 55.4 (Baseline Tc-Ur on 0642+449) RMS = 6.5 Total time: 1440 minutes ( 24.0 hours). Key: 13=DSS13 Ai=AIRA Bd=BADARY Cc=CHICHI10 Kb=KASHIM34 Mh=METSAHOV On=ONSALA60 Sm=CRIMEA Tc=TIGO Ur=URUMQI Vm=VERAMZSW Vs=VERAISGK Zc=ZELENCHK 13 Ai Bd Cc Kb Mh On Sm Tc Ur Vm Vs Zc Avg % obs. time: 37 53 20 54 22 54 50 46 47 35 57 52 24 43 % cal. time: 3 2 3 2 4 2 2 2 3 3 2 2 3 2 % slew time: 34 6 43 6 38 24 13 29 7 31 7 7 40 22 % idle time: 25 38 33 37 35 18 34 22 42 29 33 38 32 33 total # scans: 288 184 280 172 309 148 175 184 227 271 134 133 254 212 # scans/hour : 12 8 12 7 13 6 7 8 9 11 6 6 11 9 Avg scan (sec): 111 250 63 273 62 318 246 215 180 113 369 340 83 201 # data tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 # Mk5 tracks: 16 16 16 16 16 16 16 16 16 16 16 16 16 Total GBytes: 576 828 319 846 342 847 775 711 737 550 890 813 380 663 Total GB(M5): 512 736 283 752 304 753 689 632 655 488 791 723 338 589 Total GBytes (M5) recorded: 7657.0 # OF OBSERVATIONS BY BASELINE | 13 Ai Bd Cc Kb Mh On Sm Tc Ur Vm Vs Zc StnTotal --------------------------------------------------------------------------- 13| 29 63 30 65 31 42 23 201 55 21 20 46 626 Ai| 114 146 161 49 54 53 1 117 85 75 59 943 Bd| 103 207 100 109 111 0 238 87 95 165 1392 Cc| 155 45 47 45 1 103 85 71 50 881 Kb| 80 84 84 4 193 128 104 115 1380 Mh| 137 120 20 106 45 45 118 896 On| 121 26 115 43 41 129 948 Sm| 18 122 44 44 172 957 Tc| 1 0 0 31 303 Ur| 85 100 170 1405 Vm| 84 42 749 Vs| 56 735 Zc| 1153 Total # of scans, observations: 695 6184 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA BADARY CHICHI10 CRIMEA DSS13 KASHIM34 ONSALA60 TIGOCONC URUMQI VERAISGK VERAMZSW ZELENCHK 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 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 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 ===========================================================