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GPD+ Wet tropospheric correction

Types of dataset: auxiliary product.  Wet tropospheric correction for the ERS-1, ERS-2, Topex/Poseidon, Envisat, Jason-1, Jason-2, Cryosat-2 and Saral/AltiKa missions.

Contents: GPD+ (GNSS (Global Navigation Satellite Systems) derived Path Delay Plus) wet tropospheric correction for each point in the corresponding GDR.

Use: coastal applications, ocean applications 

Description: Due to its large space-time variability, the wet tropospheric correction (WTC) is still considered a significant error source in satellite altimetry. The GPD+ dataset is the result of the most recent algorithm developed at the University of Porto to retrieve improved WTC for radar altimeter missions. The GPD+ WTC are estimated by space-time objective analysis, by combining all available observations in the vicinity of the point: valid measurements from the on-board microwave radiometer (MWR), from GNSS coastal and island stations and from scanning imaging MWR on board various remote sensing missions.

Format: NetCDF

Geographic coverage: Global

ToolsGPD+ Wet tropospheric correction handbook


Copyright : 1993- ongoing. These products were developed and validated by the University of Porto, and are distributed by Aviso+. Publications should include the following statement in the Acknowledgments: “The data used in this study were developed and validated by the University of Porto, and distributed by Aviso+, France”.

Satellite Type Form-based access Data period











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cycles 1 to 53 (AVISO convention), 1991/08–1996/04

cycles 1 to 167, 1995/04–2011/05

cycles 6 to 113, 2002/04–2012/03

cycles 1 to 481, 1992/07–2005/08

cycles 1 to 374, 2002/01–2012/03

cycles 1 to 383, 2008/05–2019/10

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subcycles 4-126, 2010/07-2020/01

cycles 1 to 35, 2013/03/-2016/07

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