IVS-T2049 (International VLBI Service - Terrestical Reference Frame Observations) 2007 Feb. 06/07 doy 037/038 Institute for Geodesy and Geoinformation (IGG) of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2007 (master07.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 T2049 Experiment description: IVS-T2.049 Scheduler: BONN/Mueskens Correlator: see master07.txt Nominal start: 2007-037-17:30:00 Nominal end: 2007-038-17:30:00 Current yyyyddd: 2007037 (2007.10) ( 14138 MJD, TUES 6FEB.) Greenwich sidereal time: 2:35:52.00 (17:30: 0 UT) Sun's RA and DEC: 21h 19.9m -15d 34.5 =========================================================== There are no observations for Kokee and Wettzell from 18:15 U.T. to 19:45 U.T. Kokee and Wettzell will participate in the intensive session during this 1.5 hour period. =========================================================== First observations Observation listing from file t2049.skd for experiment T2049 Source Start DURATIONS name yyddd-hhmmss 13 45 Ft Hh Kk Nt Ny Oh On Sh Tc Ur Wz 0537-441 07037-173000| 240 240 212 349 349 | 0955+476 07037-173000| 89 66 89 118 101 118 86| 1606+106 07037-173404| 41 41 | 0059+581 07037-173421| 40 40 40 61 61 40| End of listing. =========================================================== Last observations 0749+540 07038-170405| 402 542 665 549 665 476| 1156+295 07038-170523| 40 44 44 | 1606+106 07038-170811| 40 40 40 | 1958-179 07038-171040| 40 211 211 | 1255-316 07038-171051| 229 229 | 1921-293 07038-171203| 217 217 | 0602+673 07038-171244| 92 92| 1334-127 07038-171650| 40 40 40 | 0727-115 07038-171653| 40 40 40| 1519-273 07038-171914| 40 40 40 | 2243-123 07038-172412| 40 52 52 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 3.8 Min = .0 Max = 96.0 (Baseline 13-On on 2243-123) RMS = 6.6 Total time: 1435 minutes ( 23.9 hours). Key: 13=DSS13 45=DSS45 Ft=FORTLEZA Hh=HARTRAO Kk=KOKEE Nt=NOTO Ny=NYALES20 Oh=OHIGGINS On=ONSALA60 Sh=SESHAN25 Tc=TIGO Ur=URUMQI Wz=WETTZELL 13 45 Ft Hh Kk Nt Ny Oh On Sh Tc Ur Wz Avg % obs. time: 36 33 50 38 51 38 43 60 58 43 53 48 39 45 % cal. time: 3 3 1 2 2 3 3 2 2 3 1 2 3 2 % slew time: 29 34 20 32 12 33 15 13 14 26 4 24 8 21 % idle time: 31 29 27 27 34 25 39 24 25 28 41 24 49 32 total # scans: 259 223 127 141 182 232 225 132 185 218 103 208 231 189 # scans/hour : 10.8 9.3 5.3 5.9 7.6 9.7 9.4 5.5 7.7 9.1 4.3 8.7 9.7 7.9 Avg scan (sec): 118 129 342 234 240 141 166 389 269 170 444 200 146 229 Total GBytes: 552 518 782 594 787 588 672 924 896 667 823 750 605 704 Total GB(M5): 491 460 695 528 700 523 597 822 796 593 731 667 538 626 # of tapes : .9 .9 5.3 1.0 1.4 .9 1.1 1.5 1.5 1.1 1.4 1.2 1.0 Total number of tapes: 19.1 Total GBytes (M5) recorded: 8140.6 # OF OBSERVATIONS BY BASELINE | 13 45 Ft Hh Kk Nt Ny Oh On Sh Tc Ur Wz StnTotal ------------------------------------------------------------------ 13|259 57 55 5 123 61 98 32 56 72 57 57 74 747 45| 223 12 44 72 14 24 81 12 70 38 46 14 484 Ft| 127 48 22 43 23 44 27 3 39 12 35 363 Hh| 141 0 64 22 47 37 22 12 34 44 379 Kk| 182 21 61 24 33 75 43 54 39 567 Nt| 232 146 15 146 93 5 126 191 925 Ny| 225 4 141 126 7 145 164 961 Oh| 132 8 0 21 4 10 290 On| 185 108 5 132 162 867 Sh| 218 0 164 116 849 Tc| 103 0 3 230 Ur| 208 140 914 Wz| 231 992 Total # of scans, observations: 674 4284 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: DSS13 DSS45 HARTRAO KOKEE NOTO NYALES20 ONSALA60 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: FORTLEZA 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: OHIGGINS SESHAN25 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 =========================================================== Minor Options Option Norm Wt Aux_Parm Astro Abs 5.00 BegScan Rel 1.00 EndScan Rel 1.00 NumObs Rel 5.00 StatIdle Abs 1.00 StatWt Abs 10.00 FFFFF FFTFF TFF =========================================================== Major Options SkyCov Yes Min_Between 25 Best% 75.0 Last_Hrs 24.00 Add_ps 30.00 Obs_Wts SNRwt =========================================================== Tape types ID Station Tape length Density Passes 13 DSS13 17400feet (Thin ) 56250 (HIGH ) 14 45 DSS45 17400feet (Thin ) 56250 (HIGH ) 14 Ft FORTLEZA 8700feet (Thick ) 33333 (Low ) 14 Hh HARTRAO 17400feet (Thin ) 56250 (HIGH ) 14 Kk KOKEE 17400feet (Thin ) 56250 (HIGH ) 14 Nt NOTO 17400feet (Thin ) 56250 (HIGH ) 14 Ny NYALES20 17400feet (Thin ) 56250 (HIGH ) 14 Oh OHIGGINS 17400feet (Thin ) 56250 (HIGH ) 14 On ONSALA60 17400feet (Thin ) 56250 (HIGH ) 14 Sh SESHAN25 17400feet (Thin ) 56250 (HIGH ) 14 Tc TIGOCONC 17400feet (Thin ) 56250 (HIGH ) 14 Ur URUMQI 17400feet (Thin ) 56250 (HIGH ) 14 Wz WETTZELL 17400feet (Thin ) 56250 (HIGH ) 14 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 3) S-band (margin 3) 13 45 Ft Hh Kk Nt Ny Oh On Sh Tc Ur 13 45 Ft Hh Kk Nt Ny Oh On Sh Tc Ur 45 25 45 25 Ft 25 25 Ft 25 25 Hh 25 25 25 Hh 25 25 25 Kk 25 25 25 25 Kk 25 25 25 25 Nt 25 25 25 25 25 Nt 25 25 25 25 25 Ny 25 25 25 25 25 25 Ny 25 25 25 25 25 25 Oh 18 18 18 18 18 18 18 Oh 18 18 18 18 18 18 18 On 25 25 25 25 25 25 25 18 On 25 25 25 25 25 25 25 18 Sh 25 25 25 25 25 25 25 18 25 Sh 25 25 25 25 25 25 25 18 25 Tc 20 20 20 20 20 20 20 20 20 20 Tc 20 20 20 20 20 20 20 20 20 20 Ur 25 25 25 25 25 25 25 18 25 25 20 Ur 25 25 25 25 25 25 25 18 25 25 20 Wz 25 25 25 25 25 25 25 18 25 25 20 25 Wz 25 25 25 25 25 25 25 18 25 25 20 25