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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

VIE_GLOB

Hana Spicakova


Vie glob 1c
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


How to run vie glob
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


Gui for rf definition of datum
GUI for RFDefinition of datum

VieVS/DATA/GLOB/TRF/

DATUM/

DISCONT/

VELOC/

VieVS/DATA/GLOB/CRF/

DATUM/

FIXED_SOURCES/

VieVS User Workshop 2010


Theoretical background
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


Datum definition
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


Final solution
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


Estimates example
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


Estimates example1
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


Results
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


Plots
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


Plots1
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


Thank you for your attention!

VieVS User Workshop 2010