ANALYSIS OF THE RESULTS OF THE 1994 AND 1996 GEODYSSEA GPS CAMPAIGNS AT IfAG.
M. BECKER, P. NEUMAIER, E. REINHART 1)
In the ASEAN-EU project „GEODYSSEA“ two GPS campaigns have been conducted in
South-East Asia. In two 5 day campaigns in November/December 1994 and in April 1996
more than 40 stations have been repeatedly observed. The homogeneous dataset of both
epochs has been analyzed at the Institute of Applied Geodesy (IfAG), Frankfurt using the
Bernese Software Version 4.0. The results of the individual campaigns show a high internal
consistency at the 5 mm level of the rms. The station velocities are determined with respect to
the ITRF94 coordinates of 5 IGFS common to both epochs. Station displacements are
compared to the NUVEL1A displacement vectors. The accuracy, the optimal estimation
strategy, the transformation to the ITRF94 and the significance of the velocities estimated are
discussed. The IfAG solution is compared to the final combined solution of all analysis centers.
Special emphasis is put to the vertical component and the study of possible systematic effects
in the observations and the results. These are set up of baselines, troposphere estimation,
ionosphere estimation and the datum selection.
1) Institut fuer Angewandte Geodaesie (IfAG)
Richard Strauss Allee 11
60598 Frankfurt a. M., Germany
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