The definition of a global height reference system is based on a mean sea surface, gravity
field parameters, and a three-dimensional terrestrial reference frame (TRF). Tide gauge …

One goal of modern geodesy is the global unification of vertical datums so that height data
from them can be properly integrated. This thesis studies the unification of the 13 disparate …

Abstract Satellite radar altimetry (Topex/Poseidon T/P) was used to establish a consistent
altimetric reference network over the Amazon basin. A methodolody was developed that …

Considering that the Colombian classical height system is incompatible with the new global
positioning techniques, in particular using the Global Positioning System (GPS), the Instituto …

Neste trabalho apresentamos uma metodologia para distinguir possíveis movimentos da
crosta de variações do nível médio do mar, utilizando dados GNSS, modelos de velocidade …

Several global geopotential models based on Gravity field and steady-state Ocean
Circulation Explorer (GOCE) satellite have been published in the last few years. Some of …

Few benchmarks of the Brazilian Fundamental Vertical Network (BFVN) have measured
gravity values. While its leveling lines have been established since 1945 with approximately …

The integration of gravity data within the Brazilian leveling network is very difficult due to the
historical dissociation between leveling and gravity surveys. This research was started, in …

The vertical reference frames for Argentina and Brazil present discrepancies due to their
different datums and realizations. Thus, since 2008, we have started a series of activities …

O Equador e em geral os demais países da América do Sul, não dispõem de uma referência
única para as altitudes. Cada país tem o Datum Vertical (DV) associado a uma superfície de …