IVS-T2081 (International VLBI Service - Terrestical Reference Frame Observations) 2012 Feb.14/15 doy 045-046 Institute for Geodesy and Geoinformation (IGGB) of the University of Bonn, Germany Nominal Start Time: 17h30 UT Nominal End Time: 17h30 UT Duration: 24.0 hr Correlator: BONN Participating stations: =========== AIRA BADARY CHICHI10 CRIMEA DSS13 FORTLEZA HARTRAO KSHIM11 KUNMING KOGANEI MEDICINA OHIGGINS ONSALA60 TIGOCONC NYALES20 TSUKUB32 UCHINOUR URUMQI VERAISGK VERAMZSW WETTZELL 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: t2081a =========================================================== Experiment: T2081 Description IVS-T2.081 Scheduler: IGGB/Muesk Correlator: BONN Start: 2012-045-17:30:00 End: 2012-046-17:30:00 Current yyyyddd: 2012045 (2012.12) ( 15972 MJD, TUES 14FEB.) =========================================================== There are no observations for Kokee and Wettzell from 18:20 U.T. to 19:40 U.T. Kokee and Wettzell will participate in the intensive session during this 1.5 hour period. =========================================================== First observations Observation listing from file ./t2081.skd for experiment T2081 Source Start DURATIONS name yyddd-hhmmss 13 Ai Bd Cc Ft Hh K1 Kg Kk Km Mc Ny Oh On Tc Ts Uc Ur Vm Vs Wz 0537-441 12045-173000| 67 142 142 | 0552+398 12045-173000| 354 25 440 467 467 251 21 139 111 210 20 28 58 477 477 98| 1749+096 12045-173304| 38 175 175 107 | Last observations 1334-127 12046-171442| 720 720 299 299 118 54 38 40 | 4C39.25 12046-172113| 20 105 57 20 105 34 95 20 20 26 152 152 48| 0106+013 12046-172227| 69 69 | NRAO150 12046-172334| 74 74 20 20 | 1128+385 12046-172439| 62 70 159 139 159 55 143 75| 1741-038 12046-172541| 29 55 25 55 | 0607-157 12046-172743| 35 35 | 2136+141 12046-172841| 20 20| =========================================================== Average number of obs. per baseline per source(normalized by up-time) = 2.1 Min = 0.0 Max = 110.8 (Baseline 13-Ts on 1255-316) RMS = 5.6 Total time: 1439 minutes ( 24.0 hours). Key: 13=DSS13 Ai=AIRA Bd=BADARY Cc=CHICHI10 Ft=FORTLEZA Hh=HARTRAO K1=KASHIM11 Kg=KOGANEI Kk=KOKEE Km=KUNMING Mc=MEDICINA Ny=NYALES20 Oh=OHIGGINS On=ONSALA60 Tc=TIGO Ts=TSUKUB32 Uc=UCHINOUR Ur=URUMQI Vm=VERAMZSW Vs=VERAISGK Wz=WETTZELL 13 Ai Bd Cc Ft Hh K1 Kg Kk Km Mc Ny Oh On Tc Ts Uc Ur Vm Vs Wz Avg % obs. time: 30 59 20 58 42 28 56 51 36 21 40 38 43 44 51 17 19 37 52 44 28 39 % cal. time: 3 2 3 2 2 2 3 3 3 4 2 3 1 2 2 4 4 3 2 2 3 3 % slew time: 41 7 48 6 28 32 8 10 15 36 28 16 8 14 3 20 8 32 8 8 10 19 % idle time: 25 30 27 33 27 38 32 35 45 38 29 42 47 39 44 58 67 27 37 45 58 40 total # scans: 275 188 301 176 159 139 224 268 223 309 194 244 111 177 151 384 373 262 145 147 236 223 # scans/hour : 11 8 13 7 7 6 9 11 9 13 8 10 5 7 6 16 16 11 6 6 10 9 Avg scan (sec): 95 273 56 284 228 172 217 164 141 58 176 135 334 213 289 38 45 122 310 261 104 176 # data tracks: 16 16 16 16 16 16 16 16 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 16 16 16 16 16 16 16 16 Total GBytes: 469 923 306 900 654 430 875 791 567 323 616 591 668 678 786 264 302 578 810 691 440 603 Total GB(M5): 417 821 272 800 581 382 777 703 504 287 547 525 594 602 699 235 268 513 720 614 392 536 Total GBytes (M5) recorded: 11253.7 # OF OBSERVATIONS BY BASELINE | 13 Ai Bd Cc Ft Hh K1 Kg Kk Km Mc Ny Oh On Tc Ts Uc Ur Vm Vs Wz StnTotal ------------------------------------------------------------------------------------------------------------------- 13| 44 78 39 64 8 60 70 120 63 55 98 29 59 78 100 82 68 29 22 74 1240 Ai| 98 142 1 13 136 130 69 110 40 60 0 42 0 151 155 90 75 62 44 1462 Bd| 90 7 30 123 145 98 237 109 160 0 109 0 217 223 226 70 71 131 2222 Cc| 1 12 127 125 69 105 36 53 0 39 0 140 142 89 71 58 39 1377 Ft| 56 2 2 14 6 34 21 48 23 66 3 3 9 0 0 43 403 Hh| 14 15 0 28 45 27 44 18 28 19 20 29 10 8 44 468 K1| 189 92 133 57 89 0 58 0 191 171 119 92 64 61 1778 Kg| 117 156 63 110 0 70 0 232 212 134 96 77 70 2013 Kk| 101 44 85 13 51 29 142 125 86 52 42 57 1406 Km| 99 140 1 96 0 228 257 213 77 89 120 2259 Mc| 131 8 131 7 82 84 111 22 20 155 1333 Ny| 0 139 9 139 141 155 43 37 155 1792 Oh| 1 51 1 0 2 0 0 8 206 On| 6 86 88 104 25 21 137 1303 Tc| 4 1 0 0 0 14 293 Ts| 318 182 124 101 103 2563 Uc| 192 101 118 105 2538 Ur| 61 61 127 2058 Vm| 62 24 1034 Vs| 20 933 Wz| 1531 Total # of scans, observations: 949 15106 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: AIRA BADARY CHICHI10 DSS13 FORTLEZA HARTRAO KASHIM11 KOKEE KUNMING KOGANEI MEDICINA NYALES20 OHIGGINS ONSALA60 TIGOCONC TSUKUB32 UCHINOUR URUMQI VERAISGK VERAMZSW WETTZELL 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 ===========================================================