Previous studies have demonstrated that tides are subject to considerable changes on secular time scales. However, these rely sea level observations from tide gauges predominantly located in coastal and shelf regions therefore, the large-scale patterns remain uncertain. Now, for first time, satellite radar altimetry (TOPEX/Poseidon & Jason series) has been used study worldwide linear trends tid...

Abstract The wet tropospheric correction (WTC) is a required to satellite altimetry measurements, mainly due the atmospheric water vapor delay. On-board microwave radiometers (MWR) provide information for WTC estimation but fail in coastal zones and inland waters. In view recover these areas, Global Navigation Satellite System (GNSS)-derived Path Delay Plus (GPD+) method, developed by Universit...

Closely spaced satellite altimeter profiles collected during the Geosat Geodetic Mission (-6 km) and the ERS 1 Geodetic Phase (8 km) are easily converted to grids of vertical gravity gradient and gravity anomaly. The long-wavelength radial orbit error is suppressed below the noise level of the altimeter by taking the along-track derivative of each profile. Ascending and descending slope profile...

[1] Sea surface height (SSH) measurements from the Geosat satellite altimetry mission are analyzed to statistically characterize their noise process, which is defined here as the small-scale (<50 km), timevarying component of the altimetry data. This analysis is one component of a larger effort to extract meaningful information about seafloor roughness from the small-scale fabric of the altimet...

A robust method to estimate vertical crustal motions by combining geocentric sea level measurements from decadal (1992 2003) TOPEX/POSEIDON satellite altimetry and long-term (> 40 years) relative sea level records from tide gauges using a novel Gauss-Markov stochastic adjustment model is presented. These results represent an improvement over a prior study (Kuo et al. 2004) in Fennoscandia, wher...

ABSTRACT Northeast Brazil is one of the most populated semiarid regions in world. The region highly dependent on reservoirs for human water supply, irrigation, industry, and livestock. objective this study was to validate level time series from satellites Envisat, SARAL, Sentinel-3A/-3B, Jason-2/-3 small Brazil. In total, we evaluated 20 reservoirs. Sentinel-3B outperforms other altimeters with...

Marine gravity field recovery relies heavily on satellite altimetry. Thanks to the evolution of altimetry missions and improvements in altimeter data processing methods, marine model has been prominently enhanced accuracy resolution. However, high-accuracy high-resolution from remains particularly challenging. We provide an overview advances for recovery, focusing impact factors available model...