IVS-OHIG17/18/19 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2002 Feb. 04 2002 Feb. 06 2002 Feb. 11 Notes prepared by Arno Mueskens Geodetic Institute of the University of Bonn, Germany Schedule name: ohig17.skd ohig18.skd ohig19.skd on CDDISA SUBNET Ft Kk Hh Oh Ho (Sy) OHIG17 Nominal Start: 12:00 U.T. on Feb. 04 (day 035) name yyddd-hhmmss Ft Hh Ho Kk Oh 1958-179 02035-120000| 160 160 | 0727-115 02035-120000| 40 40 | 0537-441 02035-120303| 90 90| Duration: 24 hours Nominal Stop: 12:00 U.T. on Feb. 05 (day 036) name yyddd-hhmmss Ft Hh Kk Sy 1124-186 02036-114505| 70 70 | 1741-038 02036-114731| 300 130 300| 1057-797 02036-115400| 510 510| 1749+096 02036-115425| 60 60 | OHIG18 Nominal Start: 18:00 U.T. on Feb.06 (day 037) name yyddd-hhmmss Ft Hh Ho Oh 0537-441 02037-180000| 150 180 100 180| Duration: 24 hours Nominal Stop: 18:00 U.T. on Feb.07 (day 038) name yyddd-hhmmss Ft Hh Ho Oh 2145+067 02038-174427| 280 280| 0823+033 02038-174554| 130 130 | OHIG19 Nominal Start: 14:00 U.T. on Feb.11 (day 042) name yyddd-hhmmss Ft Hh Ho Kk Oh Sy 0537-441 02042-140000| 196 196 196 196| 1749+096 02042-140000| 60 60 | Duration: 24 hours Nominal Stop: 14:00 U.T. on Feb.12 (day 043) name yyddd-hhmmss Ft Hh Ho Kk Oh Sy 0537-441 02043-131308| 120 190 190 190| 1749+096 02043-134733| 60 60 | 0537-441 02043-135207| 40 40 40| 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 will join the network in the fall campaign. Swowa may participate, depending on their availability. 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 18 at X-band and 18 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 20 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. Name Code EUR2-SX SX Recording mode setup for: FORTLEZA HOBART26 HARTRAO KOKEE OHIGGINS SYOWA 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 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 SUMMARY ======= OHIG17 Ft Hh Ho Kk Oh Avg % obs. time: 51 44 42 42 13 38 % cal. time: 2 2 3 3 0 2 % slew time: 29 39 45 10 4 25 % idle time: 17 13 8 43 82 32 # of tapes : 2.9 .7 2.4 .7 .2 total # scans: 228 228 314 301 42 222 # scans/hour : 9 9 13 12 1 9.3 Avg scan (sec): 192 169 115 120 275 174 OHIG18 Ft Hh Ho Oh Avg % obs. time: 46 46 36 40 42 % cal. time: 1 2 1 1 2 % slew time: 25 41 30 12 27 % idle time: 26 9 30 45 27 # of tapes : 2.8 .7 2.2 .6 total # scans: 169 231 168 120 172 # scans/hour : 7 9 7 5 7.2 Avg scan (sec): 236 172 187 285 220 OHIG19 Ft Hh Ho Kk Oh Sy Avg % obs. time: 50 43 42 43 11 42 39 % cal. time: 2 2 3 3 0 2 2 % slew time: 29 39 44 11 2 3 21 % idle time: 17 13 9 41 85 51 36 # of tapes : 2.7 .6 2.2 .6 .2 .6 total # scans: 235 234 310 298 34 212 220 # scans/hour : 9 9 13 12 1 8 9.2 Avg scan (sec): 182 159 117 125 283 169 172