A high-resolution gravimetric quasigeoid model for Vietnam

Gravimetric quasigeoid in Slovakia by the finite element method

Accuracy assessment of GOCE-based geopotential models and their use for modelling the gravimetric quasigeoid – A case study for Poland

The GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) has signifi cantly upgraded the knowledge on the Earth gravity fi eld. In this contribution the accuracy of height anomalies determined from Global Geopotential Models (GGMs) based on approximately 27 months GOCE satellite gravity gradiometry (SGG) data have been assessed over Poland using three sets of precise GNSS/levelling ...

Astrogeodetic Validation of Gravimetric Quasigeoid Models in the German Alps - First Results

In regions with a rough topography, e.g. the European Alps, the accuracy of geoid or quasigeoid models is often reduced. For the validation and accuracy assessment of gravimetric models, astronomical levelling is a well-suited independent method. In a test area, located in the German Alps, a new astrogeodetic data set was acquired using the Hannover Digital Zenith Camera System. Vertical deflec...

Unification of New Zealand’s local vertical datums: iterative gravimetric quasigeoid computation and gravity data reduction

New Zealand uses 13 separate local vertical datums (LVDs) based on normal-orthometric-corrected precise geodetic levelling from 12 different tide-gauges. We describe their unification using a regional gravimetric quasigeoid model and GPS-levelling data on each LVD. A novel application of iterative quasigeoid computation is used, where the LVD offsets computed from earlier models are used to app...

Model Free Gravimetric Detection

In recent work [1], we introduced a new, linear-programming based method, for detecting underground features based on gravity measurements. The current paper takes this method one important step further, in that it makes it work under realistic conditions, where most of the physical characteristics of the environment are not known. In particular, the ADCS algorithm we introduce works when the f...