IVS-T2052 (International VLBI Service - Terrestical Reference Frame Observations) 2007 Nov,27-28 doy 331-332 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 T2052 Experiment description: IVS-T2.052 Scheduler: IGGB/Mueskens Correlator: see master07.txt Nominal start: 2007-331-17:30:00 Nominal end: 2007-332-17:30:01 Current yyyyddd: 2007331 (2007.91) ( 14432 MJD, TUES 27NOV.) Greenwich sidereal time: 21:55: 0.00 (17:30: 0 UT) Sun's RA and DEC: 16h 12.6m -21d 8.7 =========================================================== First observations Observation listing from file t2052.skd for experiment T2052 Source Start DURATIONS name yyddd-hhmmss 15 Hh Ho Kb Nt Ny On Tc Ts Ur Wf Wz 0458-020 07331-173000| 611 720 209 173 720 | 2145+067 07331-173000| 86 139 266 266 179 112| 1606+106 07331-235056| 55 202 40 40 202 | End of listing. =========================================================== Last observations 1954-388 07332-170908| 247 247 | 0955+476 07332-171038| 48 150 40 147 150 146| 1044+719 07332-171230| 40 40 | 2145+067 07332-171701| 110 40 110 64 40 40| 0727-115 07332-171728| 40 40 40 | 0537-441 07332-171956| 40 40 40 | 1606+106 07332-171956| 40 40 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 5.2 Min = 0.0 Max = 84.7 (Baseline Ho-On on 0727-115) RMS = 8.5 Total time: 1431 minutes ( 23.9 hours). Key: 15=DSS15 Hh=HARTRAO Ho=HOBART26 Kb=KASHIM34 Nt=NOTO Ny=NYALES20 On=ONSALA60 Tc=TIGO Ts=TSUKUB32 Ur=URUMQI Wf=WESTFORD Wz=WETTZELL 15 Hh Ho Kb Nt Ny On Tc Ts Ur Wf Wz Avg % obs. time: 23 41 49 28 30 39 44 55 23 37 41 32 37 % cal. time: 1 1 1 2 1 1 1 1 2 1 1 1 1 % slew time: 38 40 30 36 38 14 16 4 13 24 11 10 23 % idle time: 37 17 19 34 30 45 37 39 61 37 46 56 39 total # scans: 184 181 183 280 256 223 222 119 290 210 205 257 217 # scans/hour : 7.7 7.6 7.7 11.7 10.7 9.4 9.3 5.0 12.2 8.8 8.6 10.8 9.1 Avg scan (sec): 108 194 231 84 102 149 171 399 69 151 173 106 160 Total GBytes: 374 648 777 451 492 618 702 865 384 591 656 514 589 Total GB(M5): 332 576 691 401 437 550 624 769 341 525 583 457 524 # of tapes : 0.6 1.1 1.4 3.1 0.8 1.0 1.1 1.4 0.6 1.0 1.1 0.9 Total number of tapes: 14.1 Total GBytes (M5) recorded: 6284.8 # OF OBSERVATIONS BY BASELINE | 15 Hh Ho Kb Nt Ny On Tc Ts Ur Wf Wz StnTotal -------------------------------------------------------------- 15|184 10 55 79 32 56 41 51 82 38 87 43 574 Hh| 181 51 32 126 51 83 27 37 73 35 98 623 Ho| 183 99 19 15 7 51 101 52 8 14 472 Kb| 280 63 96 72 7 276 126 55 76 981 Nt| 256 139 170 21 65 108 92 216 1051 Ny| 223 157 10 99 114 106 172 1015 On| 222 14 76 115 104 205 1044 Tc| 119 8 0 43 13 245 Ts| 290 131 57 78 1010 Ur| 210 53 128 938 Wf| 205 107 747 Wz| 257 1150 Total # of scans, observations: 670 4925 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: DSS15 HARTRAO NOTO NYALES20 ONSALA60 TIGOCONC URUMQI WESTFORD 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: HOBART26 TSUKUB32 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 Recording mode setup for: KASHIM34 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 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 3) S-band (margin 3) 15 Hh Ho Kb Nt Ny On Tc Ts Ur Wf 15 Hh Ho Kb Nt Ny On Tc Ts Ur Wf Hh 25 Hh 25 Ho 25 25 Ho 25 25 Kb 25 25 25 Kb 25 25 25 Nt 25 25 25 25 Nt 25 25 25 25 Ny 25 25 25 25 25 Ny 25 25 25 25 25 On 25 25 25 25 25 25 On 25 25 25 25 25 25 Tc 20 20 20 20 20 20 20 Tc 20 20 20 20 20 20 20 Ts 25 25 25 25 25 25 25 20 Ts 25 25 25 25 25 25 25 20 Ur 25 25 25 25 25 25 25 20 25 Ur 25 25 25 25 25 25 25 20 25 Wf 25 25 25 25 25 25 25 20 25 25 Wf 25 25 25 25 25 25 25 20 25 25 Wz 25 25 25 25 25 25 25 20 25 25 25 Wz 25 25 25 25 25 25 25 20 25 25 25