You are here: Home USNO Earth Orientation Software Supporting Software

Supporting Software

There are a number of software routines available for use with our Earth Orientation products as inputs.  Each link below provides recommended routines depending on your application.

  • IERS Conventions 2010 provides models and procedures for the realization of reference frames by the IERS.
  • IAU Standards of Fundamental Astronomy (SOFA) provides software for use in astronomical computations.
  • Naval Observatory Vector Astrometry Subroutines (NOVAS) provides software to compute a number of astrometric quantities and transformations (celestial ↔ terrestrial).
USNO Master Clock Time
Javascript must be Enabled