The OCA geodesy team provides:

• "Short Arc" analysis to give access to satellite orbit errors.
• Time series of observation station position, and of Earth Orientation Parameters (EOP), deduced from its own data computations, and those from others groups linked to international services (IDS, IGS, ILRS, IVS).
  
• The laser station bias database, constitued by the team, between two successive technology evolutions.
• and drives the french Analysis Center of ILRS.

• IERS EOP time series
• WEB-service including two executable files (Linux/DOS):

  1) download of EOP C04 at any time
  2) computation of the matrix between IRCF and ITRF at any time with a precision of 50 mas today.

  These two executable files could be called from any procedure Fortran /C-C++/ php / Perl /.

• ICRF and extragalactic radio-sources
• French centre of IVS analysis, with :
  • VLBI Operational products
  • Network explorer: display antenna's network VLBI by session

The IRTF website benefits from a cartography host which enables to visualize the different ITRF networks, spot networks from each technique, the velocity fields ITRF since ITRF94 and also the border of plate tectonics according to two patterns. It enables too a point selection in view of accessing to the ITRF coordinates of under-network at the chosen period.

See: http://itrf.ensg.ign.fr