IVS-T2019 (International VLBI Service - Terrestical reference frame observations) 2003 Jul 15/16 Geodetic Institute of the University of Bonn, Germany Correlator: BONN Purpose ======= The purpose of the IVS-T2 sessions is to monitor the TRF via monthly sessions. All geodetic stations participate in at least three T2 sessions each year. These sessions replace the IRIS-S sessions observed in previous years. The TRF determine from single session solutions or from a global solution is very important IVS product because this is an essential part for creating the ITRF by corresponding IERS Product Center. A particular strength of VLBI is its contribution to the scale of the ITRF. Usually the TRF is computed from the 24h sessions that are dedicated to observing the EOP. Network ======= The standard configuration of the monthly observed IVS-T2 experiments consists of eight stations. The eight station differ in some extent between all available IVS geodetic network stations from month to month. Schedule ======== This schedule was generated by SKED using the EUR2-SX band and the EUR2SX-C-2 frequency setup, depending on which station are available for this observation. Variable scan lengths with a minimum 60 sec. and the most recent source flux models are included. SNR goals are 20 to 25 at X-band and S-band depent on different baselines and stations. The predicted SNRs used include a 30 ps noise contribution added in quadrature, which is a typical magnitude for the reweight constants applied in SOLVE solutions. The schedule is generated for the estimation of all five (nine) earth orientation parameters, clock offsets and clock rates for all participating stations except the reference station and atmo- sphere parameters for all participating stations. It was optimized for three earth orientation parameters (polar motion, UT1). Other optimization features enabled for this experiment : - the covariance analysis during schedule generation considers the previous 2 hours of observations, - minor SKED optimization parameters . maximum number of observations, . minimum time, 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 - using 59 source for improving the sky covorage Procedures ========== 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. Please generate the procedures for this session using drudg. THIS SCHEDULE HAS NO EARLY TAPE START !! ---------------------------------------- KOKEE should record data with MK5 !! ------------------------------------- Parameter values for experiment T2019 Experiment description: IVS-T2019 Scheduler: Mueskens Correlator: BONN Nominal start: 2003-196-17:30:00 Nominal end: 2003-197-17:30:01 Current yyyyddd: 2003196 (2003.54) ( 12836 MJD, TUES 15JUL.) Greenwich sidereal time: 13: 2:37.66 (17:30: 0 UT) Sun's RA and DEC: 7h 38.6m 21d 30.4 =========================================================== First observations Observation listing from file t2019.skd for experiment T2019 Source Start DURATIONS name yyddd-hhmmss Ap Yk Hh Kk Ny Ur Yb 0552+398 03196-173000| 60 368 498 92 498| 1606+106 03196-173000| 530 530 | 1308+326 03196-173854| 75 75 | 0106+013 03196-174041| 80 80 | 1741-038 03196-174126| 102 108 108| End of listing. =========================================================== Last observations Observation listing from file t2019.skd for experiment T2019 Source Start DURATIONS name yyddd-hhmmss Ap Yk Hh Kk Ny Ur Yb 0727-115 03197-165524| 60 60 | 1606+106 03197-165536| 519 279 488 519| CTA26 03197-165928| 60 182 182 | 0454-234 03197-170453| 60 60 | 2128-123 03197-170715| 622 622 | 1308+326 03197-171213| 75 75 | End of listing. =========================================================== Average number of obs. per baseline per source (normalized by up-time) = 2.2 Min = .0 Max = 70.2 (Baseline Ny-Yb on 1741-038) RMS = 5.3 Total time: 1423 minutes ( 23.7 hours). Key: Ap=ALGOPARK Yk=ARIES_9M Hh=HARTRAO Kk=KOKEE Ny=NYALES20 Ur=URUMQI Yb=YEBES Ap Yk Hh Kk Ny Ur Yb Avg % obs. time: 31 20 32 47 49 56 26 37 % cal. time: 2 1 1 2 2 2 1 2 % slew time: 54 11 25 12 13 24 9 21 % idle time: 11 66 41 36 34 15 63 38 total # scans: 242 101 114 246 236 227 90 179 # scans/hour : 10 4 4 10 9 9 3 7.5 Avg scan (sec): 111 171 240 166 179 213 251 190 Total GBytes: 212 136 215 322 333 381 178 253 # of tapes : .5 1.1 .5 .7 .7 .8 .4 tape change times (hhmm): 0000 1541 0000 0000 0000 0000 0000 # OF OBSERVATIONS BY BASELINE | Ap Yk Hh Kk Ny Ur Yb StnTotal ------------------------------------------ Ap|242 60 25 151 95 33 32 396 Yk| 101 0 93 30 18 4 205 Hh| 114 0 42 75 68 210 Kk| 246 71 76 2 393 Ny| 236 159 45 442 Ur| 227 41 402 Yb| 90 192 Number of 2-station scans: 325 Number of 3-station scans: 101 Number of 4-station scans: 57 Number of 5-station scans: 15 Number of 6-station scans: 0 Number of 7-station scans: 0 Total # of scans, observations: 498 1120 =========================================================== Recording mode Name Code EUR-SX SX Recording mode setup for: ALGOPARK HARTRAO KOKEE NYALES20 URUMQI YEBES 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= 85.0 MHz rms spanned bw= 33.0 MHz Effective number of channels recorded per sub-pass X S Total 8.000 6.000 14.000 Recording mode setup for: YLOW7296 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= 85.0 MHz rms spanned bw= 33.0 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 Ap ALGOPARK 17400feet (Thin ) 56250. (High) 12 Yk YLOW7296 8700feet (Thick) 33333. (Low ) 12 Hh HARTRAO 17400feet (Thin ) 56250. (High) 12 Kk KOKEE 17400feet (Thin ) 56250. (High) 12 Ny NYALES20 17400feet (Thin ) 56250. (High) 12 Ur URUMQI 17400feet (Thin ) 56250. (High) 12 Yb YEBES 17400feet (Thin ) 56250. (High) 12 =========================================================== SNR Targets Minimum SNR by baseline for multi-baseline scans X-band (margin 0) S-band (margin 0) Ap Yk Hh Kk Ny Ur Ap Yk Hh Kk Ny Ur Yk 20 Yk 20 Hh 25 20 Hh 25 20 Kk 25 20 25 Kk 25 20 25 Ny 25 20 25 25 Ny 25 20 25 25 Ur 25 20 25 25 25 Ur 25 20 25 25 25 Yb 25 20 25 25 25 25 Yb 25 20 25 25 25 25