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
uses radar altimetry to quantify maximum annual water levels (referred to the geoid) at
intersections between the satellite ground tracks and the river network and derive, through
spatial interpolation, maximum annual water levels at hydrometric stations. Comparison with
maximum annuyal readings at gauges allowed the determination of local orthometric …