IVS-OHIG33 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2004 Nov. 09/10 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 A Kk KOKEE VLBA/ thin tape P Oh OHIGGINS VLBA4/ thin tape S Sy Syowa/JAP K5/ thin tape / Mk5 C Tc TIGOCONC VLBA4/ thin tape 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 OHIG33 Experiment description: IVS-OHIG33 Scheduler: mueskens Nominal start: 2004-314-17:30:00 Nominal end: 2004-315-17:30:01 Current yyyyddd: 2004314 (2004.86) ( 13319 MJD, TUES 9NOV.) Greenwich sidereal time: 20:46:53.00 (17:30: 0 UT) Sun's RA and DEC: 15h .8m -17d 5.9 =========================================================== 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. =========================================================== Observation listing from file ohig33.skd for experiment OHIG33 Source Start DURATIONS name yyddd-hhmmss Ft Ho Kk Oh Sy Tc 1622-253 04314-173000| 211 378 411 411| 0607-157 04314-173000| 60 60 | =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Ho Kk Oh Sy Tc 1921-293 04315-165721| 327 505 505| 1803+784 04315-170540| 265 265 | CTA26 04315-170825| 344 344 | 0727-115 04315-171751| 60 60 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 3.4 Min = .0 Max = 49.7 (Baseline Ho-Oh on 1741-038) RMS = 7.5 Total time: 1429 minutes ( 23.8 hours). Key: Ft=FORTLEZA Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Sy=SYOWA Tc=TIGO Ft Ho Kk Oh Sy Tc Avg % obs. time: 53 52 52 54 57 33 50 % cal. time: 1 2 2 1 1 0 1 % slew time: 17 32 7 8 1 2 11 % idle time: 26 13 38 36 39 62 36 total # scans: 114 192 175 95 122 61 126 # scans/hour : 4 8 7 3 5 2 5.3 Avg scan (sec): 404 234 257 488 405 473 376 Total GBytes: 363 353 354 365 389 227 342 Total GB(M5): 369 359 359 371 395 231 348 # of tapes : 3.3 .8 .8 .9 .9 .5 tape change times (hhmm): 0105 0000 0000 0000 0000 0000 0713 0000 0000 0000 0000 0000 1417 0000 0000 0000 0000 0000 Total number of tapes: 7.3 Total GBytes (M5) recorded: 2087.2 # OF OBSERVATIONS BY BASELINE | Ft Ho Kk Oh Sy Tc StnTotal -------------------------------------- Ft|114 2 53 44 31 29 159 Ho| 192 112 32 83 10 239 Kk| 175 25 16 22 228 Oh| 95 40 25 166 Sy| 122 15 185 Tc| 61 101 Number of 2-station scans: 260 Number of 3-station scans: 62 Number of 4-station scans: 8 Number of 5-station scans: 3 Number of 6-station scans: 1 Total # of scans, observations: 334 539 =========================================================== 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: 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 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 3) S-band (margin 3) Ft Ho Kk Oh Sy Ft Ho Kk Oh Sy Ho 20 Ho 20 Kk 20 20 Kk 20 20 Oh 20 20 20 Oh 20 20 20 Sy 20 20 20 20 Sy 20 20 20 20 Tc 20 20 20 20 20 Tc 20 20 20 20 20