Mission

The Earth Orientation Centre is responsible for monitoring long-term Earth Orientation Parameters, publishing time dissemination information, and announcing leap seconds.

Web site

http://hpiers.obspm.fr/eop-pc/

Main products

• Monthly Earth orientation data
  • Bulletin B
• Leap second announcements in UTC
  
  • Bulletin C
• Announcements of DUT1
  • Bulletin D
• Long term Earth orientation data
  • EOP C01 IAU1980 (1846-1899)     
  • EOP C01 IAU2000 (1846-1899)
  • EOP C01 IAU1980 (1900-now)
  • EOP C01 IAU2000 (1900-now)
  • EOP C01 IAU1980 (1846-now)
  • EOP C01 IAU2000 (1846-now)
  • EOP 14 C04 (IAU1980, dPsi, dEps) 0hUTC - one file (1962-now)
  • EOP 14 C04 (IAU2000A, dX, dY) 0hUTC - yearly files
  • EOP 14 C04 (IAU2000A, dX, dY) 0hUTC - one file (1962-now)
  • EOP 20 C04 (IAU2000A, dX, dY) 0hUTC - one file (1962-now)
  • EOP 20 C04 (IAU2000A, dX, dY) 12hUTC - one file (1984-now)
  • EOP 20 C04 (IAU2000A, dPsi, dEps) 0hUTC - one file (1962-now)
  • EOP 20 C04 (IAU2000A, dPsi, dEps) 12hUTC - one file (1984-now)
  • EOP 20u23 C04 (IAU2000A, dX, dY) 0hUTC - one file (1962-now)         
  • EOP 20u23 C04 (IAU2000A, dX, dY) 12hUTC - one file (1984-now)
  • EOP 20u23 C04 (IAU2000A, dPsi, dEps) 0hUTC - one file (1962-now)
  • EOP 20u23 C04 (IAU2000A, dPsi, dEps) 12hUTC - one file (1984-now) 

For more details about the tasks, please consult the Terms of Reference and the Call for Participation in the new IERS.