A new version of the Envisat Precise Orbit products has been generated by the Centre de Traitement Doris Poseidon (CTDP) using the Geophysical Data Records F standards (GDR-F). The new dataset (DOR_VOR_AX vF) is now available to users in Envisat format from the ESA dissemination service.
Access to the Precise Orbit data is provided upon Registration.

The new DOR_VOR vF dataset is covering the full mission archive from 09/04/2002 to 08/04/2012. Users are recommended to apply the new GDR-F version, but the previous datasets are still available (i.e. GDR-D and GDR-E versions).

The most significant changes related to the GDR-F standards concern the new ocean tide model (FES2014) and the updated Terrestrial Reference Frame (ITRF2014). The new standards significantly improve all Precise Orbit Determination (POD) metrics; with respect to GDR-E, the mean difference and variance of Sea Surface Height (SSH) at crossovers is slightly reduced.

See further details in the Readme file for Envisat DORIS Precise Orbit Determination files.