The information provided on this page is applicable to the series of Envisat Precise Orbits DOR_VOR products, with latest dataset generated with Geophysical Data Records F standards (GDR-F).  The new standards improve the new ocean tide model (FES2014) and the updated Terrestrial Reference Frame (ITRF2014) with a significant improvement in 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.

The DOR_VOR products are distributed in Envisat format and are available upon Registration. 

DORIS Precise Orbit Technical Documents:

• README file for ENVISAT DORIS Precise Orbit Determination files, QA4EO-SER-IPF-TSP-4173, issue 1.1
• DORIS Products Specifications, PO-RS-MDA-GS-2009, Issue 3B
• DOR_VOR_AX File structure  
• POD-E and POE-F evolution of models orbit standard 
• Comparison for ENVISAT CNES POE-F versus CNES POE-E