IVS-OHIG22 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2002 Nov. 20 Notes prepared by Arno Mueskens Geodetic Institute of the University of Bonn, Germany Schedule name: ohig22.skd and ohig22.txt file on CDDISA SUBNET Ft Kk Hh Oh Ho Tc Sy 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 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. TIGO and Syowa station participate that time in this network. 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 20/15 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. THIS SCHEDULE HAS NO EARLY TAPE START !! ---------------------------------------- =========================================================== Parameter values for experiment OHIG22 Experiment description: IVS-OHIG22 Correlator: BONN Nominal start: 2002-324-18:00:00 Nominal end: 2002-325-18:00:00 Current yyyyddd: 2002324 (2002.89) ( 12599 MJD, WED. 20NOV.) Greenwich sidereal time: 21:58:18.97 (18: 0: 0 UT) Sun's RA and DEC: 15h 44.0m -19d 46.1 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ft Kk Hh Ho Oh Sy Tc 0104-408 02324-180000| 720 200 720 | 1334-127 02324-180000| 560 560| 0229+131 02324-180653| 310 310 | 1726+455 02324-181143| 613 613| 0454-234 02324-181450| 50 40 50 | End of listing. =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Kk Hh Ho Oh Sy Tc 1921-293 02325-171830| 47 47 | 2128-123 02325-172142| 328 328 | 1144-379 02325-172408| 720 250 720 | 0003-066 02325-172953| 720 720 | 0537-441 02325-173651| 44 130 130 | 0454-234 02325-174600| 45 40 45 | End of listing. =========================================================== Key: Ft=FORTLEZA Kk=KOKEE Hh=HARTRAO Ho=HOBART26 Oh=OHIGGINS Sy=SYOWA Tc=TIGO Ft Kk Hh Ho Oh Sy Tc Avg % obs. time: 58 55 40 51 40 48 50 49 % cal. time: 1 1 1 2 0 1 0 1 % slew time: 20 7 29 33 5 2 2 14 % idle time: 19 35 28 13 52 47 45 34 total # scans: 121 147 140 175 63 124 77 121 # scans/hour : 5 6 5 7 2 5 3 5.0 Avg scan (sec): 415 322 248 249 555 335 565 384 Total GBytes: 396 373 274 344 275 327 342 333 # of tapes : 3.4 .8 .6 3.0 .7 .8 .8 tape change times (hhmm): 0116 0000 0000 0202 0000 0000 0000 0825 0000 0000 1037 0000 0000 0000 1519 0000 0000 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ft Kk Hh Ho Oh Sy Tc StnTotal ------------------------------------------ Ft|121 26 78 3 39 35 44 225 Kk| 147 0 98 16 13 39 192 Hh| 140 43 28 76 19 244 Ho| 175 17 70 6 237 Oh| 63 33 44 177 Sy| 124 19 246 Tc| 77 171 Number of 2-station scans: 236 Number of 3-station scans: 60 Number of 4-station scans: 30 Number of 5-station scans: 15 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 341 746 =========================================================== 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 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 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 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 Kk Hh Ho Oh Sy Ft Kk Hh Ho Oh Sy Kk 25 Kk 20 Hh 25 25 Hh 20 20 Ho 25 25 25 Ho 20 20 20 Oh 15 15 15 15 Oh 12 12 12 12 Sy 15 15 15 15 15 Sy 15 15 15 15 12 Tc 15 15 15 15 15 15 Tc 12 12 12 12 12 12