The DUACS (Data Unification and Altimeter Combination System) system processes data from different altimeter missions to provide a consistent and homogeneous catalogue of sea level products and derivate variables for a wide range of applications, both for near real time (NRT) applications and delayed-time (DT) studies.

The DUACS processing steps are summarized in the following figure.


DUACS processing steps
Overview of the DUACS processing steps

L2P upstream data

Acquisition and data selection

Homogenization and cross-calibration

Along-track (L3) products generation

Merged gridded (L4) products generation

Derived products and quality control

To read more about the DUACS processing, you can also see Pujol et al, 2016