IVS-T2044 (International VLBI Service - Terrestical Reference Frame Observations) 2006 May 23/24 doy 143-144 Geodetic Institute of the University of Bonn, Germany Correlator ========== see MASTER SCHEDULE 2006 (master06.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 EURSX-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 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 T2044 Experiment description: IVS-T2.044 Scheduler: BONN/Mueskens Correlator: see multi agency schedule Nominal start: 2006-143-17:30:00 Nominal end: 2006-144-17:30:01 Current yyyyddd: 2006143 (2006.39) ( 13879 MJD, TUES 23MAY.) Greenwich sidereal time: 9:34:44.00 (17:30: 0 UT) Sun's RA and DEC: 4h 1.5m 20d 38.9 =========================================================== There are no observations for Kokee and Wettzell from 18:30 U.T. to 19:30 U.T. Kokee and Wettzell will participate in the intensive session during this two hour period. =========================================================== First observations Observation listing from file t2044.skd for experiment T2044 Source Start DURATIONS name yyddd-hhmmss Ap Yk Sm Ft Kb Kk Gg Pa Ts Ur Wz Zc 0059+581 06143-173000| 143 720 286 720 239 720 720 361| 1044+719 06143-173824| 240 240 96 80 76| 2201+315 06143-174116| 75 75 | 1611+343 06143-174459| 53 53 33 30| 2145+067 06143-174505| 37 30 37 30 30 | =========================================================== Last observations name yyddd-hhmmss Ap Yk Sm Ft Kb Kk Gg Pa Ts Ur Wz Zc OJ287 06144-170520| 104 720 720 457 312| 1749+096 06144-170552| 75 102 102 63 | 1923+210 06144-170852| 197 197 174 | 0823+033 06144-171340| 147 262 262 132| 2145+067 06144-171432| 30 30 30 30 | 0235+164 06144-171636| 189 189 | 1606+106 06144-171820| 30 30 | 1034-293 06144-172025| 110 110 47| 1954-388 06144-172114| 30 30 30 30 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 3.6 Min = .0 Max = 84.7 (Baseline Pa-Zc on 0454-234) RMS = 6.8 Total time: 1431 minutes ( 23.9 hours). Key: Ap=ALGOPARK Yk=ARIES_9M Sm=CRIMEA Ft=FORTLEZA Kb=KASHIM34 Kk=KOKEE Gg=ORION_5M Pa=PARKES64 Ts=TSUKUB32 Ur=URUMQI Wz=WETTZELL Zc=ZELENCHK Ap Yk Sm Ft Kb Kk Gg Pa Ts Ur Wz Zc Avg % obs. time: 26 61 48 30 35 45 24 11 30 48 44 29 36 % cal. time: 2 1 2 1 2 2 0 1 2 2 2 2 1 % slew time: 59 10 27 17 33 9 2 31 12 20 8 34 22 % idle time: 12 26 21 50 28 42 72 55 54 29 45 32 39 total # scans: 192 123 181 99 228 174 63 114 244 184 200 221 168 # scans/hour : 8.1 5.2 7.6 4.2 9.6 7.3 2.6 4.8 10.2 7.7 8.4 9.3 7.1 Avg scan (sec): 118 432 232 265 134 224 338 89 105 224 189 116 205 Total GBytes: 222 428 345 245 295 367 197 89 254 388 358 251 287 Total GB(M5): 197 435 350 217 263 326 175 90 226 345 318 223 264 # of tapes : .4 3.6 2.8 1.5 2.0 .6 .4 .7 .4 .6 .6 .4 tape change times (hhmm): 0000 0014 0221 0812 0526 0000 0000 0000 0000 0000 0000 0000 0000 0647 1045 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 1317 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 Total number of tapes: 14.0 Total GBytes (M5) recorded: 3171.2 # OF OBSERVATIONS BY BASELINE | Ap Yk Sm Ft Kb Kk Gg Pa Ts Ur Wz Zc StnTotal -------------------------------------------------------------- Ap|192 89 18 42 52 68 51 0 55 25 44 36 480 Yk| 123 23 13 66 69 6 6 69 39 46 40 466 Sm| 181 32 61 16 2 6 65 103 123 147 596 Ft| 99 2 13 10 1 2 15 44 34 208 Kb| 228 99 4 74 220 108 72 89 847 Kk| 174 13 56 106 32 35 34 541 Gg| 63 0 4 0 4 5 99 Pa| 114 80 31 0 9 263 Ts| 244 111 79 95 886 Ur| 184 101 123 688 Wz| 200 150 698 Zc| 221 762 Total # of scans, observations: 577 3267 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: ALGOPARK TSUKUB32 Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 64.000 Mbits 32.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 1 16(*2) 32 40.00 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: YLOW7296 CRIMEA PARKES 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: FORTLEZA KASHIM34 Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 64.000 Mbits 32.000 MHz 14 1 NONE Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 1 16(*2) 32 67.50 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: KOKEE GGAO7108 URUMQI WETTZELL ZELENCHK Mode Tot.Rate Tot.BandW #chan #bits Barrel Mk341:2 64.000 Mbits 32.000 MHz 14 1 16 Chan.BW #Subpasses Tracks(*fan) Tot.tracks Speed 2.00 MHz 1 16(*2) 32 40.00 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 =========================================================== Tape types ID Station Tape length Density Passes Ap ALGOPARK 17400feet (Thin ) 56250 (HIGH ) 14 Yk YLOW7296 8700feet (Thick ) 33333 (Low ) 12 Sm CRIMEA 8700feet (Thick ) 33333 (Low ) 12 Ft FORTLEZA 8700feet (Thick ) 33333 (Low ) 14 Kb KASHIM34 8700feet (Thick ) 33333 (Low ) 12 Kk KOKEE 17400feet (Thin ) 56250 (HIGH ) 14 Gg GGAO7108 17400feet (Thin ) 56250 (HIGH ) 14 Pa PARKES 8700feet (Thick ) 33333 (Low ) 12 Ts TSUKUB32 17400feet (Thin ) 56250 (HIGH ) 14 Ur URUMQI 17400feet (Thin ) 56250 (HIGH ) 14 Wz WETTZELL 17400feet (Thin ) 56250 (HIGH ) 14 Zc ZELENCHK 17400feet (Thin ) 56250 (HIGH ) 14 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 3) S-band (margin 3) Ap Yk Sm Ft Kb Kk Gg Pa Ts Ur Wz Ap Yk Sm Ft Kb Kk Gg Pa Ts Ur Wz Yk 20 Yk 18 Sm 22 22 Sm 22 22 Ft 22 22 22 Ft 22 22 22 Kb 25 20 22 22 Kb 25 18 22 22 Kk 25 20 22 22 25 Kk 25 18 22 22 25 Gg 20 20 22 22 20 20 Gg 18 18 22 22 18 18 Pa 25 20 22 22 25 25 20 Pa 25 18 22 22 25 25 18 Ts 25 20 22 22 25 25 20 25 Ts 25 18 22 22 25 25 18 25 Ur 25 20 22 22 25 25 20 25 25 Ur 25 18 22 22 25 25 18 25 25 Wz 25 20 22 22 25 25 20 25 25 25 Wz 25 18 22 22 25 25 18 25 25 25 Zc 25 20 22 22 25 25 20 25 25 25 25 Zc 25 18 22 22 25 25 18 25 25 25 25