Main Topics of study

• Home
• Sea State Bias
• Wet Tropospheric Correction
• UPorto GPD+ Wet Tropospheric Correction

In Portugal, the Faculty of Sciences of University of Porto (FCUP) has maintained its unique position in support a group of research dedicated to Satellite Altimetry.

Satellite Altimetry has transformed the way we view Earth and its Ocean. With the forthcoming of precise satellite altimetry missions, the estimation of long-term sea level variability with an accuracy of a few centimeters became possible. To guaranty a high level of accuracy, corrections to the altimeter measurements are needed, since these measurements are affected by external effects, such as instrumental, geophysical (e.g., ocean and Earth tides, ocean and atmospheric loading), and those due to atmosphere (troposphere and ionosphere) and ocean interaction (sea surface state). Moreover, the satellite height above a reference ellipsoid provided by a precise orbit solution, referred to an International Terrestrial Reference Frame (ITRF), is required.

UPorto has been devoping the GNSS Path Delay Plus (GPD+) wet tropospheric corrections, and currently these producs are provided on this webpage on section 'Products'.