IVS-T2016 (International VLBI Service - Terrestical reference frame observations) 2003 April 08/09 Geodetic Institute of the University of Bonn, Germany Correlator: WASH Purpose ======= The purpose of the IVS-T2 sessions is to monitor the TRF via monthly sessions. All geodetic stations participate in at least three T2 sessions each year. These sessions replace the IRIS-S sessions observed in previous years. 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 eight stations. The eight station differ in some extent between all available IVS geodetic network stations from month to month. Schedule ======== This schedule was generated by SKED using the EUR2-SX band and the EUR2SX-C-2 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 15 to 25 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. The schedule is generated for the estimation of all five (nine) earth orientation parameters, clock offsets and clock rates for all participating stations except the reference station and atmo- sphere parameters for all participating stations. It was optimized for three earth orientation parameters (polar motion, UT1). Other optimization features enabled for this experiment : - the covariance analysis during schedule generation considers the previous 2 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 25 min - using 59 source for improving the sky covorage 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. Please generate the procedures for this session using drudg. THIS SCHEDULE HAS NO EARLY TAPE START !! ---------------------------------------- Parameter values for experiment T2016 Experiment description: IVS-T2016 Scheduler: Mueskens Correlator: WASH Nominal start: 2003-098-17:30:00 Nominal end: 2003-099-17:30:01 Current yyyyddd: 2003098 (2003.27) ( 12738 MJD, TUES 8APR.) =========================================================== First observations Observation listing from file t2016.skd for experiment T2016 Source Start DURATIONS name yyddd-hhmmss Sm Ft Ma Ny Gg Sv Ur Wf 4C39.25 03098-173000| 60 60 60 60 178 | 0003-066 03098-173000| 760 760| NRAO512 03098-173554| 344 157 344 | CTA26 03098-174636| 350 350 163| End of listing. =========================================================== Observation listing from file t2016.skd for experiment T2016 Source Start DURATIONS name yyddd-hhmmss Sm Ft Ma Ny Gg Sv Ur Wf 2145+067 03099-165153| 477 477| 0528+134 03099-165439| 83 83 60 | OJ287 03099-165756| 249 192 94 249 | 2255-282 03099-170033| 471 471| 0805+410 03099-170151| 707 707 | 1124-186 03099-170332| 760 743 760 | End of listing. =========================================================== SKED Summary from file t2016.skd for experiment T2016 (all scans with at least one subnet station) Average number of obs. per baseline per source (normalized by up-time) = 2.2 Min = .0 Max = 68.6 (Baseline Ny-Sv on 1741-038) RMS = 4.9 Total time: 1426 minutes ( 23.8 hours). Key: Sm=CRIMEA Ft=FORTLEZA Ma=MATERA Ny=NYALES20 Gg=ORION_5M Sv=SVETLOE Ur=URUMQI Wf=WESTFORD Sm Ft Ma Ny Gg Sv Ur Wf Avg % obs. time: 35 41 46 56 27 34 48 65 44 % cal. time: 1 1 1 2 0 2 1 1 1 % slew time: 17 16 14 11 1 31 17 8 14 % idle time: 45 41 36 29 71 31 32 24 38 total # scans: 132 88 171 203 49 204 161 166 146 # scans/hour : 5 3 7 8 2 8 6 6 6.1 Avg scan (sec): 228 399 234 238 471 145 255 338 288 Total GBytes: 237 277 315 381 181 234 324 442 298 # of tapes : 2.0 2.4 .7 .8 .4 1.8 .7 2.0 tape change times (hhmm): 0417 0316 0000 0000 0000 0655 0000 1910 1703 1425 0000 0000 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Sm Ft Ma Ny Gg Sv Ur Wf StnTotal ---------------------------------------------- Sm|132 21 109 80 1 100 123 26 460 Ft| 88 46 17 20 22 12 64 202 Ma| 171 101 5 128 115 60 564 Ny| 203 7 173 107 85 570 Gg| 49 7 0 47 87 Sv| 204 120 67 617 Ur| 161 30 507 Wf| 166 379 Number of 2-station scans: 156 Number of 3-station scans: 63 Number of 4-station scans: 49 Number of 5-station scans: 61 Number of 6-station scans: 24 Number of 7-station scans: 4 Number of 8-station scans: 0 Total # of scans, observations: 357 1693 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: CRIMEA FORTLEZA SVETLOE Mode Tot.Rate Tot.BandW #chan #bits Barrel C 56.000 Mbits 28.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 2 14(*0) 28 135.00 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 8.000 6.000 14.000 Recording mode setup for: MATERA NYALES20 GGAO7108 URUMQI WESTFORD Mode Tot.Rate Tot.BandW #chan #bits Barrel C 56.000 Mbits 28.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 2 14(*0) 28 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 8.000 6.000 14.000 =========================================================== Tape types ID Station Tape length Density Passes Sm CRIMEA 8700feet (Thick) 33333. (Low ) 12 Ft FORTLEZA 8700feet (Thick) 33333. (Low ) 12 Ma MATERA 17400feet (Thin ) 56250. (High) 12 Ny NYALES20 17400feet (Thin ) 56250. (High) 12 Gg GGAO7108 17400feet (Thin ) 56250. (High) 12 Sv SVETLOE 8700feet (Thick) 33333. (Low ) 12 Ur URUMQI 17400feet (Thin ) 56250. (High) 12 Wf WESTFORD 17400feet (Thin ) 56250. (High) 12 ===========================================================