IVS-OHIG28 (Continuous Observations of the Rotation of the Earth and South terrestical reference frame network) 2003 Dec. 03/04 Geodetic Institute of the University of Bonn, Germany 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. Schedule ======== This is a schedule generated with the automatic mode of sked using the variable scan length with a minimum of 90 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 OHIG28 Experiment description: IVS-OHIG28 Scheduler: mueskens Correlator: BONN Nominal start: 2003-337-18:00:01 Nominal end: 2003-338-18:00:01 Current yyyyddd: 2003337 (2003.92) ( 12977 MJD, WED. 3DEC.) Greenwich sidereal time: 22:48:37.90 (18: 0: 1 UT) Sun's RA and DEC: 16h 38.4m -22d 6.8 =========================================================== First observations Observation listing from file ohig28.skd for experiment OHIG28 Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh Sy Tc 1741-038 03337-180001| 206 720 720| 0454-234 03337-180001| 99 99 | 0528+134 03337-180427| 136 136 | 1749+096 03337-180550| 429 429 | CTA26 03337-180901| 189 189 | End of listing. =========================================================== Last observations Source Start DURATIONS name yyddd-hhmmss Ft Hh Ho Kk Oh Sy Tc 2121+053 03338-172234| 720 408 720 | 1124-186 03338-172704| 163 163 | 1334-127 03338-173035| 720 720| 0537-441 03338-173535| 205 456 511 511 | 0727-115 03338-174527| 90 220 220 | 1921-293 03338-174636| 90 90 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 1.0 Min = .0 Max = 27.7 (Baseline Ho-Kk on 4C39.25 ) RMS = 2.8 Total time: 1428 minutes ( 23.8 hours). Key: Ft=FORTLEZA Hh=HARTRAO Ho=HOBART26 Kk=KOKEE Oh=OHIGGINS Sy=SYOWA Tc=TIGO Ft Hh Ho Kk Oh Sy Tc Avg % obs. time: 56 53 57 61 23 40 36 47 % cal. time: 1 1 2 1 0 0 0 1 % slew time: 19 27 29 7 2 1 1 12 % idle time: 22 17 10 28 73 57 60 38 total # scans: 115 143 182 164 29 83 53 109 # scans/hour : 4 6 7 6 1 3 2 4.6 Avg scan (sec): 423 320 272 323 686 417 594 433 Total GBytes: 383 361 390 417 156 273 248 318 # of tapes : 3.3 .8 .9 .9 .4 .6 .6 # OF OBSERVATIONS BY BASELINE | Ft Hh Ho Kk Oh Sy Tc StnTotal ------------------------------------------ Ft|115 73 0 28 17 19 25 162 Hh| 143 48 0 11 59 8 199 Ho| 182 118 5 42 7 220 Kk| 164 5 7 30 188 Oh| 29 12 19 69 Sy| 83 5 144 Tc| 53 94 Number of 2-station scans: 267 Number of 3-station scans: 61 Number of 4-station scans: 8 Number of 5-station scans: 4 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 340 538 =========================================================== Recording mode Name Code EUR2-SX SX Recording mode setup for: FORTLEZA 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 HOBART26 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 17400feet (Thin ) 56250. (High) 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 Hh Ho Kk Oh Sy Ft Hh Ho Kk Oh Sy Hh 22 Hh 20 Ho 22 22 Ho 20 20 Kk 22 22 22 Kk 20 20 20 Oh 15 15 15 15 Oh 15 15 15 15 Sy 15 15 15 15 15 Sy 15 15 15 15 15 Tc 15 15 15 15 15 15 Tc 15 15 15 15 15 15