The Ocean Waves Thematic Data Products (TDP) are taking into account the improvements made in the frame of the REAPER project, the ENVISAT reprocessing 3.0, the CMEMS Sea Level TAC, ESA Sea-State CCI.

The Ocean Waves Thematic Data Products will propose Level 2+ global product at 5Hz with a common product definition. An uncertainty value will be computed for each measurement.

Data Access

Will be available at the end of the project (end of 2022)

Processing & Algorithms

This section contains preliminary results and does not contain all expected improvements. It will be completed and enhanced during the life of the project. 

Retracking Algorithm : Adaptive (ENVISAT), MLE3 (ERS)

Filtering algorithm : HFA (High-Frequency Adjustement)

Editing strategy :

Improvements compared to existing products

One of the most important improvement brought by the FDR4ALT products is the application of the Adaptive retracker on ENVISAT :

Preliminary results already show improvements compared to previous ENVISAT products : The Adaptive retracker improves the SWH short scale content by reducing the PSD energy. The 20Hz noise reduction is close to 70% compared to the MLE-3 from the V3.0 ENVISAT reprocessing.

Documentation : 

Benefits of the Adaptive Algorithm for Retracking Altimeter Nadir Echoes: Results From Simulations and CFOSAT/SWIM Observations (https://ieeexplore.ieee.org/abstract/document/9385074)