geoid heights

Modeling the geoid and polar motion in geological tim

The main objective of our research is to: 1) conduct a correlation analysis of the relationship between geoid heights and topographic heights in the modern era using calculated moving correlation coefficients (MCC); 2) extrapolate the obtained correlation model to past geological epochs and determine the paleogeoid using known surface heights derived from paleoDEM continental reconstruction models (Scotese and Wright, 2018); 3) perform calculations of changes in "True Polar Wander" (TPW) based on the obtained paleogeoid height data sets resulting from the movement of lithospheric plates.

Construction of the field of anomalies of the geoid's gravity and height by the fast Fourier transform

The geoid heights and the gravity anomaly in the Black sea are computed from altimetry data of ERS-1, ERS-2, TOPEX/POSEIDON, GFO, ENVISAT, JASON-1. The geoid heights and the gravity anomaly in the Black sea are computed at the grid points 1' x 1' by FFT method.

 

On setting of the heights system in the Antarctic area

The construction of the regional altimetry-gravimetry quasigeoid is considered. This problem  was solved via the regional gravimetry quasigeoid transformation to the mean sea level given  by six satellite altimetry missions at time-period 1992-2007. Then the altimetry-gravimetry quasigeoid solution was selected for further computation of the gravity potential W0 for the Antarctic area. By this, a version of the vertical heights system in accordance with the gravity regional field is proposed.