IVS-OHIG21 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2002 Nov. 18 Notes prepared by Arno Mueskens Geodetic Institute of the University of Bonn, Germany Schedule name: ohig21.skd and ohig21.txt file on CDDISA SUBNET Ft Kk Hh Oh Ho 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 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 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 10 SECOND EARLY TAPE START !! ----------------------------------------------- Parameter values for experiment OHIG21 Experiment description: IVS-OHIG21 Correlator: BONN Nominal start: 2002-322-12:00:00 Nominal end: 2002-323-12:00:00 Current yyyyddd: 2002322 (2002.88) ( 12597 MJD, MON. 18NOV.) Greenwich sidereal time: 15:49:26.72 (12: 0: 0 UT) Sun's RA and DEC: 15h 34.6m -19d 14.9 =========================================================== First observations Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh 1741-038 02322-120000| 70 70 | 0454-234 02322-120000| 150 210 210| 1606+106 02322-120333| 160 160 | 0208-512 02322-120553| 70 70 | 0106+013 02322-120915| 96 96 | End of listing. =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh 0727-115 02323-114933| 232 159 232| End of listing. Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh 1749+096 02323-112505| 114 114 | 0229+131 02323-112938| 365 365 | 1334-127 02323-113047| 601 135 601| 0528+134 02323-113854| 573 573 | 1741-038 02323-114402| 60 60 | 0727-115 02323-114933| 232 159 232| End of listing. =========================================================== Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Ft Hh Ho Kk Oh Avg % obs. time: 56 41 50 48 48 49 % cal. time: 1 1 2 1 1 1 % slew time: 22 30 32 7 10 20 % idle time: 19 26 15 42 39 28 total # scans: 142 147 181 147 111 145 # scans/hour : 5 6 7 6 4 6.1 Avg scan (sec): 340 242 239 285 377 296 Total GBytes: 392 291 355 342 339 343 # of tapes : 4.5 .7 3.9 .8 .8 tape change times (hhmm): 1203 0000 1205 0000 0000 1930 0000 2109 0000 0000 0149 0000 0503 0000 0000 0856 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Oh StnTotal ---------------------------------- Ft|142 102 4 30 60 196 Hh| 147 46 0 53 201 Ho| 181 114 49 213 Kk| 147 27 171 Oh| 111 189 Number of 2-station scans: 251 Number of 3-station scans: 70 Number of 4-station scans: 4 Number of 5-station scans: 0 Total # of scans, observations: 325 485 =========================================================== 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 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 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 5) S-band (margin 5) Ft Hh Ho Kk Ft Hh Ho Kk Hh 25 Hh 20 Ho 25 25 Ho 20 20 Kk 25 25 25 Kk 20 20 20 Oh 15 15 15 15 Oh 12 12 12 12