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Earth orientation parameters (EOPs) are provided by the IERS Rapid Service/Prediction Center at the U.S. Naval Observatory, with a backup mirror hosted by NASA's CDDIS. The dataset includes daily and sub-daily solutions such as finals.daily, finals2000A.daily, and gpsrapid.daily, updated as frequently as three times per day. This service is designed for real-time and near-real-time applications requiring high-quality EOP data faster than the final IERS Bulletin B series.
License terms are unclear due to conflicting metadata ('other-license-specified' vs. 'None'); users should verify terms directly with IERS/USNO. Data is provided in BIN and ISO file formats, which may require specialized software for parsing.