ivsopar.obspm.fr

OPAR is a component of the International VLBI Service for Geodesy and Astrometry (IVS)
For any request, please contact us

Analysis Service

• Global solution for Earth orientation, TRF, and CRF
• Intensive solution for UT1
• Station coordinate time series
• Radio source coordinate time series
• Look at the free core nutation from IERS data

Data Center

OPAR is one of the three IVS primary data centers. You can

• Download VLBI data and products via FTP access
• Submit VLBI data and products; please contact us to obtain the procedure