Fast Registration with Immediate Access (Open)

1. Go to the ESA User Services Portal
2. Register or log in to EO Sign In
3. Submit the form for accessing the data
4. You will receive an email with your user name
5. A second email will follow with your password to download the data from ftp://envorb-ftp-ds.eo.esa.int/ via an FTP client.

The latest version of the Envisat DORIS Precise Orbit product, DOR_VOR_AX, was generated by the Centre de Traitement Doris Poseidon (CTDP) using the Geophysical Data Records F standards (GDR-F). The product is used to obtain the satellite orbital parameters (latitude, longitude, height and height rate) by using orbit computation routines.

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.

The DOR_VOR_AX product adopts the Envisat format, and the size is 0.2 Mbytes per orbit.

Users are recommended to apply the GDR-F version, but the previous datasets are still available (i.e. GDR-D and GDR-E versions).

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