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International Earth Rotation and Reference Systems Service

IERS Rapid Service/Prediction Centre

Mission

The IERS Rapid Service/Prediction Centre is responsible for providing Earth Orientation Parameters (EOPs) on a rapid turnaround basis, primarily for real-time users and others requiring high-quality EOP data sooner than the final series published by the IERS Earth Orientation Center.

Web site

https://maia.usno.navy.mil/

Main products

Rapid data and predictions

  • Latest issue, updated weekly (Thursday)
    • Bulletin A:  Rapid determinations of EOPs in a human readable format.
  • Standard EOP data files, updated weekly (Thursday)
    • finals.all (IAU1980):  Polar motion, UT1-UTC, and length of day values since 02 January 1973, along with dψ, dε, using the IAU1980 Nutation/Precession Theory (including 1 year of predictions). 
    • finals.all (IAU2000): Polar motion, UT1-UTC, and length of day values since 02 January 1973, along with dX, dY, using the IAU2000A Nutation/Precession Theory (including 1 year of predictions). 
    • finals.data (IAU1980): Polar motion, UT1-UTC, and length of day values since 01 January 1992, along with dψ, dε, using the IAU1980 Nutation/Precession Theory (including 1 year of predictions). 
    • finals.data (IAU2000): Polar motion, UT1-UTC, and length of day values since 01 January 1992, along with dX, dY, using the IAU2000A Nutation/Precession Theory (including 1 year of predictions).
    • gpsrapid.out: All EOP values since 01 May 1992, along with with dψ, dε, using IAU1980 Nutation/Precession Theory (including 15 days of predictions). 
  • Daily EOP data files, updated daily
    • finals.daily (IAU1980): Polar motion, UT1-UTC, and length of day values for last 90 days, along with dψ, dε, using IAU1980 Nutation/Precession Theory (including 90 days of predictions). 
    • finals.daily (IAU2000): Polar motion, UT1-UTC, and length of day values for last 90 days, along with dX, dY, using  IAU2000A Nutation/Precession Theory (including 90 days of predictions). 
    • gpsrapid.daily: Polar motion, UT1-UTC, and length of day values for last 90 days, along with dψ, dε, using the IAU1980 Nutation/Precession Theory (including 15 days of predictions). 

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