Auxilliairy products Wet tropospheric correction GPD+
The wet troposphere correction is the correction for the path delay in the radar return signal due to cloud liquid water and water vapour in the atmosphere. It is calculated from radiometer measurements and meteorological models. 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. 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.
Data and resources
-
HTML Open
-
HTML Open
-
Manuel UtilisateurPDF Open
-
THREDDSHTML Open
-
Fernandes, M., and Clara Lázaro. 2016. “GPD+ Wet Tropospheric Corrections for CryoSat-2 and GFO Altimetry Missions.” Remote Sensing 8 (10): 851HTML Open
-
Fernandes, M. Joana, Clara Lázaro, Michaël Ablain, and Nelson Pires. 2015. “Improved Wet Path Delays for All ESA and Reference Altimetric Missions.” Remote…HTML Open
Additional information
| Temporal extent | 1991-08-15 – 2016-07-04 |
|---|---|
| Date (creation) | 2020-05-01 |
| Status | onGoing |
| Update frequency | asNeeded |
| Metadata language | fr |
| License | Licence Ouverte |
| Source metadata | ISO 19115 XML |
| Last updated | 2026-11-04 |
| Created | 2026-11-04 |
| API | package_show |