Fitting gravimetric geoid models to vertical deflections
Citation
Featherstone, Will and Lichti, Derek. 2009. Fitting gravimetric geoid models to vertical deflections. Journal of Geodesy. 83 (6): pp. 583-589.
Source Title
Journal of Geodesy
ISSN
Faculty
Department of Spatial Sciences
Faculty of Science and Engineering
WA School of Mines
Remarks
The final publication is available at Springer via http://link.springer.com/
Collection
Abstract
Regional gravimetric geoid and quasigeoid models are now commonly fitted to GPS-levelling data, which simultaneously absorbs levelling, GPS and quasi/geoid errors due to their inseparability. We propose that independent vertical deflections are used instead, which are not affected by this inseparability problem. The formulation is set out for geoid slopes and changes in slopes. Application to 1080 astrogeodetic deflections over Australia for the AUSGeoid98 model shows that it is feasible, but the poor quality of the historical astrogeodetic deflections led to some unrealistic values.
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