IVS-OHIG34 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2004 Nov. 30/31 Geodetic Institute of the University of Bonn, Germany Correlator: see Multi Agency Schedule 2004 Purpose ======= The purpose of the CORE-OHIG (Southern Terrestrial Reference Frame) sessions is to tie together optimally the sites in the southern hemisphere. The participating sites include all the sites in the south F Ft FORTLEZA Mark3A/ thick tape H Ho HOBART26 Mark5 only J Hh HartRao Mark4/ thin tape A Kk KOKEE VLBA/ thin tape P Oh OHIGGINS VLBA4/ thin tape C Tc TIGOCONC VLBA4/ thin tape S Sy Syowa/Jap K5/ Mk5 Because these sessions concentrate on the southern sites and do not use observing time to accurately tie these sites to far northern sites (as the Global Sessions do) they should yield a very accurate regional TRF around the South Pole. Schedule ======== This is a schedule generated with the automatic mode of sked using the variable scan length with a minimum of 90 seconds. The most recent and updated source flux models are included. SNR goals are 20/20 at X-band and 20/20 at S-band for all stations. The predicted SNRs used include a 30 ps noise contribution added in quadrature, which is a typical size for the reweight constants size for the reweight constants required in SOLVE solutions. This schedule was optimized by different features: - the covariance analysis during schedule generation considers the previous 2 hours of observations, - minor SKED optimization parameters . maximum number of observations, 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 - use of CvgONLY in order to improve the geometry of observation This schedule was made using 60 sources which helped improve the sky coverage. Procedures ========== Please generate the procedures for this session using drudg. Except of Syowa station who have to prepare K4 setup procedures with the existing skd file. 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. FREQUENCY SEQUENCE: The standard EUR2-SX(2Mhz) frequency sequence is used for all CORE-OHIG experiments. Remark ====== Syowa tapes or Mk5 disk will need probably one year or more before they are received at Correlator side. On this account all participate stations should recorded data on magnetic tape (except of Hobart). The present world wide Mk5 unit situation, forced us to handle in this way. =========================================================== Parameter values for experiment OHIG34 Experiment description: IVS-OHIG34 Scheduler: mueskens Nominal start: 2004-335-17:30:00 Nominal end: 2004-336-17:30:01 Current yyyyddd: 2004335 (2004.92) ( 13340 MJD, TUES 30NOV.) Greenwich sidereal time: 22: 9:41.00 (17:30: 0 UT) Sun's RA and DEC: 16h 28.6m -21d 46.6 =========================================================== There are no observations for Kokee and Wettzell from 18:00 U.T. to 20:00 U.T. Kokee and Wettzell will participate in the intensive session during this two hour period. =========================================================== First observations Observation listing from file ohig34.skd for experiment OHIG34 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh Sy Tc 0727-115 04335-173000| 78 332 332 | 2128-123 04335-173000| 123 123 | 2145+067 04335-173426| 533 533| =========================================================== Last observations name yyddd-hhmmss Ft Hh Ho Kk Oh Sy Tc 1519-273 04336-165300| 720 720| 2145+067 04336-165930| 720 720 | 0727-115 04336-171145| 76 322 322 | 1124-186 04336-171805| 85 85 | 1954-388 04336-172018| 134 134 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 3.0 Min = .0 Max = 57.6 (Baseline Ho-Oh on 1741-038) RMS = 6.3 Total time: 1432 minutes ( 23.9 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Sy=SYOWA Tc=TIGO Ft Hh Ho Kk Oh Sy Tc Avg % obs. time: 58 54 56 56 42 60 50 54 % cal. time: 1 1 1 1 0 1 0 1 % slew time: 17 26 27 6 6 1 2 12 % idle time: 22 16 13 35 49 36 45 31 total # scans: 109 132 156 134 60 112 70 110 # scans/hour : 4 5 6 5 2 4 2 4.6 Avg scan (sec): 463 355 311 363 614 461 621 455 Total GBytes: 397 369 382 384 290 407 342 368 Total GB(M5): 403 375 388 390 294 413 347 373 # of tapes : 3.5 .9 .9 .9 .7 1.0 .8 tape change times (hhmm): 2355 0000 0000 0000 0000 0000 0000 0628 0000 0000 0000 0000 0000 0000 1419 0000 0000 0000 0000 0000 0000 Total number of tapes: 8.6 Total GBytes (M5) recorded: 2614.1 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Oh Sy Tc StnTotal ------------------------------------------ Ft|109 49 5 30 22 24 41 171 Hh| 132 57 0 23 87 11 227 Ho| 156 78 28 63 10 241 Kk| 134 20 11 38 177 Oh| 60 11 0 104 Sy| 112 3 199 Tc| 70 103 Number of 2-station scans: 194 Number of 3-station scans: 107 Number of 4-station scans: 16 Number of 5-station scans: 0 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 317 611 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: FORTLEZA 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: HARTRAO HOBART26 KOKEE OHIGGINS SYOWA TIGOCONC 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 Speed ID Station Tape length Speed Ft FORTLEZA 8700feet (Thick ) 33333. (Low ) 12 Hh HARTRAO 17400feet (Thin ) 56250. (High) 12 Ho HOBART26 17400feet (Thin ) 56250. (High) 12 Kk KOKEE 17400feet (Thin ) 56250. (High) 12 Oh OHIGGINS 17400feet (Thin ) 56250. (High) 12 Sy SYOWA 17400feet (Thin ) 56250. (High) 12 Tc TIGOCONC 17400feet (Thin ) 56250. (High) 12 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 5) Ft Hh Ho Kk Oh Sy Ft Hh Ho Kk Oh Sy Hh 20 Hh 20 Ho 20 20 Ho 20 20 Kk 20 20 20 Kk 20 20 20 Oh 20 20 20 20 Oh 20 20 20 20 Sy 20 20 20 20 20 Sy 20 20 20 20 20 Tc 20 20 20 20 20 20 Tc 20 20 20 20 20 20