IVS-OHIG20 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2002 Nov. 12 Notes prepared by Arno Mueskens Geodetic Institute of the University of Bonn, Germany Schedule name: ohig20.skd and ohig20.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 20/15/12 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 OHIG20 Experiment description: IVS-OHIG20 Correlator: BONN Nominal start: 2002-316-17:30:00 Nominal end: 2002-317-17:30:00 Current yyyyddd: 2002316 (2002.87) ( 12591 MJD, TUES 12NOV.) Greenwich sidereal time: 20:56:41.59 (17:30: 0 UT) Sun's RA and DEC: 15h 10.9m -17d 47.0 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ft Kk Hh Ho Oh Sy Tc 1921-293 02316-173000| 70 70 | 1606+106 02316-173000| 360 360| 0454-234 02316-173333| 40 40 | 0537-441 02316-173636| 60 140 140 | 2234+282 02316-173753| 300 300 | End of listing. =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Kk Hh Ho Oh Sy Tc OJ287 02317-170852| 163 163 | End of listing. Source Start DURATIONS name yyddd-hhmmss Ft Kk Hh Ho Oh Sy Tc 0402-362 02317-164900| 500 500 | 1334-127 02317-165228| 434 720 720 720| 0119+115 02317-165803| 720 720 | 0727-115 02317-170549| 40 40 | 1606+106 02317-170743| 411 720 720| OJ287 02317-170852| 163 163 | 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: 56 55 41 47 42 54 49 49 % cal. time: 1 1 1 2 0 1 0 1 % slew time: 21 7 28 32 4 2 2 14 % idle time: 20 35 28 18 51 41 46 34 total # scans: 122 150 137 175 63 125 72 120 # scans/hour : 5 6 5 7 2 5 3 5.0 Avg scan (sec): 395 312 259 229 578 374 588 390 Total GBytes: 380 369 279 316 286 368 333 333 # of tapes : 3.3 .9 .6 2.7 .7 .8 .8 tape change times (hhmm): 0101 0000 0000 0229 0000 0000 0000 0845 0000 0000 1101 0000 0000 0000 1533 0000 0000 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ft Kk Hh Ho Oh Sy Tc StnTotal ------------------------------------------ Ft|122 23 82 1 42 35 42 225 Kk| 150 0 107 14 15 35 194 Hh| 137 36 28 75 18 239 Ho| 175 15 71 7 237 Oh| 63 29 45 173 Sy| 125 18 243 Tc| 72 165 Number of 2-station scans: 231 Number of 3-station scans: 69 Number of 4-station scans: 25 Number of 5-station scans: 15 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 340 738 =========================================================== 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 15 Tc 15 15 15 15 15 15 Tc 15 15 15 15 12 15