IVS-OHIG24 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2003 Jan. 22/23 Geodetic Institute of the University of Bonn, Germany Correlator: WASH 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 J Hh HARTRAO Mark4 H Ho HOBART26 Mark3A A Kk KOKEE VLBA P Oh OHIGGINS VLBA4 S Sy SYOWA K4 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. Syowa station did not participate this time. Schedule ======== This is a schedule generated with the automatic mode of sked using the variable scan length with a minimum of 60 seconds. The most recent and updated source flux models are included. SNR goals are 25/15 at X-band and 20/12 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. THIS SCHEDULE HAS NO EARLY TAPE START !! ---------------------------------------- Parameter values for experiment OHIG24 Experiment description: IVS-OHIG24 Scheduler: mueskens Correlator: WASH Nominal start: 2003-022-17:30:00 Nominal end: 2003-023-17:30:01 Current yyyyddd: 2003022 (2003.06) ( 12662 MJD, WED. 22JAN.) Greenwich sidereal time: 1:36:37.02 (17:30: 0 UT) Sun's RA and DEC: 20h 18.2m -19d 39.1 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh Tc 0537-441 03022-173000| 50 60 60 | 1921-293 03022-173000| 140 140| 1124-186 03022-173443| 133 133 | 2145+067 03022-173546| 259 720 720| 1128+385 03022-173914| 216 216 | =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh Tc CTA26 03023-170453| 138 138 | OJ287 03023-170753| 189 189 | 2128-123 03023-171211| 232 232 | 1104-445 03023-171338| 121 121 | 1921-293 03023-171649| 126 126| 1057-797 03023-171952| 243 243| =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 1.5 Min = .0 Max = 24.0 (Baseline Ho-Kk on 1128+385) RMS = 3.1 Total time: 1434 minutes ( 23.9 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Tc=TIGO Ft Hh Ho Kk Oh Tc Avg % obs. time: 54 47 50 50 43 56 50 % cal. time: 1 1 2 1 0 1 1 % slew time: 21 30 31 7 6 4 16 % idle time: 23 20 16 40 49 38 31 total # scans: 130 145 175 148 73 93 127 # scans/hour : 5 6 7 6 3 3 5.3 Avg scan (sec): 359 280 248 292 509 522 368 Total GBytes: 367 319 342 341 292 382 340 # of tapes : 3.3 .7 2.9 .8 .7 .8 tape change times (hhmm): 0106 0000 0125 0000 0000 0000 0754 0000 0944 0000 0000 0000 1532 0000 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Oh Tc StnTotal -------------------------------------- Ft|130 93 3 24 36 41 197 Hh| 145 54 0 37 24 208 Ho| 175 105 32 33 227 Kk| 148 18 43 190 Oh| 73 42 165 Tc| 93 183 Number of 2-station scans: 241 Number of 3-station scans: 56 Number of 4-station scans: 26 Number of 5-station scans: 2 Total # of scans, observations: 325 585 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: FORTLEZA HOBART26 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 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 Hh HARTRAO 17400feet (Thin ) 56250. (High) 12 Ho HOBART26 8700feet (Thick) 33333. (Low ) 12 Kk KOKEE 17400feet (Thin ) 56250. (High) 12 Oh OHIGGINS 17400feet (Thin ) 56250. (High) 12 Tc TIGOCONC 17400feet (Thin ) 56250. (High) 14 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 5) Ft Hh Ho Kk Oh Ft Hh Ho Kk Oh Hh 22 Hh 20 Ho 22 22 Ho 20 20 Kk 22 22 22 Kk 20 20 20 Oh 15 15 15 15 Oh 12 12 12 12 Tc 15 15 15 15 15 Tc 12 12 12 12 12