IVS-OHIG31 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2004 Febr. 18/19 Geodetic Institute of the University of Bonn, Germany Correlator: BONN 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 H Ho HOBART26 Mark3A A Kk KOKEE VLBA P Oh OHIGGINS VLBA4 C Tc TIGOCONC VLBA4 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 25/15 at X-band and 20/15 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. =========================================================== Parameter values for experiment OHIG31 Experiment description: IVS-OHIG31 Scheduler: mueskens Correlator: BONN Nominal start: 2004-049-18:00:00 Nominal end: 2004-050-18:00:01 Current yyyyddd: 2004049 (2004.13) ( 13054 MJD, WED. 18FEB.) Greenwich sidereal time: 3:52:11.66 (18: 0: 0 UT) Sun's RA and DEC: 22h 6.2m -11d 40.4 =========================================================== First observations Observation listing from file ohig31.skd for experiment OHIG31 Source Start DURATIONS name yyddd-hhmmss Ft Ho Kk Oh Tc 0537-441 04049-180000| 604 720 720| 0059+581 04049-180000| 370 370 | 1334-127 04049-181336| 90 90 | CTA26 04049-181423| 480 480| 1606+106 04049-181748| 90 90 | End of listing. =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Ho Kk Oh Tc 0454-234 04050-173111| 720 720| 1954-388 04050-173315| 209 209 | 1334-127 04050-173959| 90 90 | 1255-316 04050-174250| 278 278 | 1606+106 04050-175035| 90 90 | 1749+096 04050-175411| 98 98 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 1.5 Min = .0 Max = 27.7 (Baseline Ho-Kk on 4C39.25 ) RMS = 4.6 Total time: 1435 minutes ( 23.9 hours). Key: Ft=FORTLEZA Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Tc=TIGO Ft Ho Kk Oh Tc Avg % obs. time: 58 52 63 40 56 54 % cal. time: 1 2 2 0 0 1 % slew time: 16 29 9 4 2 12 % idle time: 23 16 23 54 39 31 total # scans: 98 195 220 55 79 129 # scans/hour : 4 8 9 2 3 5.4 Avg scan (sec): 512 230 250 634 616 448 Total GBytes: 395 354 433 274 383 367 # of tapes : 3.5 .8 1.0 .7 .9 tape change times (hhmm): 2353 0000 0000 0000 0000 0757 0000 0000 0000 0000 1416 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ft Ho Kk Oh Tc StnTotal ---------------------------------- Ft| 98 0 42 33 64 139 Ho| 195 172 22 9 203 Kk| 220 7 24 245 Oh| 55 29 91 Tc| 79 126 Number of 2-station scans: 255 Number of 3-station scans: 39 Number of 4-station scans: 5 Number of 5-station scans: 0 Total # of scans, observations: 299 402 =========================================================== 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 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 Density Passes 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 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 Ho Kk Oh Ft Ho Kk Oh Ho 22 Ho 20 Kk 20 20 Kk 20 20 Oh 15 15 15 Oh 15 15 15 Tc 15 15 15 15 Tc 15 15 15 15