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VIE_GLOB

VIE_GLOB. Hana Spicakova. Vie_glob 1c. compatible with VieVS Version 1c parameters, which can be estimated station coordinates and velocities source coordinates Earth orientation parameters from combination of more sessions input data

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VIE_GLOB

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  1. VIE_GLOB Hana Spicakova

  2. Vie_glob 1c • compatible with VieVS Version 1c • parameters, which can be estimated • station coordinates and velocities • source coordinates • Earth orientation parameters from combination of more sessions • input data • datum free N-matrices (ATPA) and b-vectors (ATPl) • VieVS/DATA/LEVEL2 • created within a „normal“ run of VieVS VieVS User Workshop 2010

  3. How to run Vie_glob INPUT • VieVS/COMPILE/ VIE_GLOB/vie_glob.m • TEST_OUT will be created inVieVS/OUT/GLOB/_ESTIMATES/ _PLOTS/ CRF/ TRF/ • RMS – „a posteriori variance of unit weight“ only sessions with a lower RMS will be used in the global adjustment OUTPUT limit for RMS VieVS User Workshop 2010

  4. GUI for RFDefinition of datum VieVS/DATA/GLOB/TRF/ DATUM/ DISCONT/ VELOC/ VieVS/DATA/GLOB/CRF/ DATUM/ FIXED_SOURCES/ VieVS User Workshop 2010

  5. Theoretical background • Sort parameters in the N-matrix and b-vector • Reduction of parameters • always reduced: clock parameters, zwd and troposhere gradients • can be reduced: EOP • Stacking of the reduced normal equation systems estimated p. reduced p. VieVS User Workshop 2010

  6. Datum definition • Station coordinates and velocities • constrained 12 parameters Helmert transformation (3 translation and 3 rotation components + their time derivatives w.r.t. time), i.e., NNT/NNR condition • Source coordinates • 4-parameters transformation (3 rotations (A1, A2, A3) around X, Y and Z axis and a parameter dz accounting for a global translationof the source coordinatesin declination, caused e.g. by inaccuracy of the tropospheric propagation correction for sources observed at low elevations) (Feissel-Vernier et al. (2006)) • fixing selected sources to a priori coordinates VieVS User Workshop 2010

  7. Final solution • Jacobian matrix • applying of the constraints • final solution • estimates are stored as a structure array in Matlab format and as a txt file • VieVS/OUT/GLOB/_ESTIMATES/TEST_OUT/ • globsol_TEST_LEVEL2.mat • glob_results_TEST_LEVEL2.txt h = 0 (requirement of free-network constraints) VieVS User Workshop 2010

  8. Estimates (example) VieVS/OUT/GLOB/_ESTIMATES/TEST_OUT/glob_results_TEST_LEVEL2.txt names of sessions number of sessions corrections to station a priori coordinates and their standard deviations [cm] sessions with RMS>maxRMS epoch of the coordinates [mjd] start, end [mjd] of the interval (time between breaks) corrections to station a priori velocities and their standard deviations [cm/y] stations which were used for NNT/NNR VieVS User Workshop 2010

  9. Estimates (example) estimates of EOP: dx, dy pole [mas] dut1 [ms] dX, dY [mas] and their standard deviations corrections to source a priori coordinates (RA, De) and their standard deviations [mas] VieVS User Workshop 2010

  10. Results this new TRF catalogue can be used as input catalogue in VieVS „new catalogues“ (TRF and CRF) will be created automatically in VieVS/OUT/GLOB/ TRF/TEST_OUT/trf_TEST_LEVEL2.txt and CRF/TEST_OUT/trf_TEST_LEVEL2.txt VieVS User Workshop 2010

  11. Plots VieVS/OUT/GLOB/_PLOTS/TEST_OUT/ ant_map_TEST_LEVEL2.eps map of stations, blue circles: station included in NNT/NNR red circles: station excluded from NNT/NNR stations in sessions included in the global adjustment ant_activity_TEST_LEVEL2.eps VieVS User Workshop 2010

  12. Plots VieVS/OUT/GLOB/_PLOTS/TEST_OUT/ sou_map_TEST_LEVEL2.eps map of sources, blue circles: source included in NNR red circles: source excluded from NNR stations in sessions included in the global adjustment sou_activity_TEST_LEVEL2.eps VieVS User Workshop 2010

  13. Thank you for your attention! VieVS User Workshop 2010

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