CoAuthors

Francois Bignalet-Cazalet (Centre National d’Etudes Spatiales, Toulouse, France, France); Philip Callahan (Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA); Shailen Desai (Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA); Linda Forster (Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA); Adrien Guerou (Collecte Localisation Satellites, Toulouse, France, France); Bruce Haines (Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA); Nicolas Picot (Centre National d’Etudes Spatiales, Toulouse, France, France); Helene Roinard (Collecte Localisation Satellites, Toulouse, France, France); Matthieu Talpe (Jet Propulsion Laboratory, California Institute of Technology. Now at Spire, USA); Josh Willis (Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA)

The original TOPEX Geophysical Data Record products were affected by altimeter instrument degradation and drifts in the radiometer path delay correction during the time of the mission. In addition, the standards for the models used to derive the sea-level time series are now considered obsolete. As a major upgrade, new so-called GDR-F products have been generated that benefit from significant improvements. In particular, the GDR-F products apply numerical retracking of the altimeter data, the end-of-mission radiometer calibration, and GDR-F standards for the auxiliary corrections. We present a summary of the evolutions applied to this product, and results from the calibration and validation of the product.