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v0.1.0

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@rhannequin rhannequin released this 27 Feb 11:27
· 6 commits to main since this release
v0.1.0
ab5cd60

v0.1.0 - 2026-02-27

Initial public release.

Features

  • Polar motion - PolarMotion.at returns x/y coordinates with Lagrange or linear interpolation; PolarMotion.rotation_matrix_at builds the full W rotation matrix; PolarMotion.between for daily range queries
  • UT1-UTC - UT1.at with automatic UT1-TAI normalization across leap second boundaries; Bulletin B preference over Series A when available
  • Celestial pole offsets - CelestialPoleOffset.at for dX/dY corrections
  • Length of day - LengthOfDay.at for LOD excess
  • Delta T - DeltaT.at for TT - UT1, extended back to 1800 with Espenak & Meeus polynomials
  • Earth Rotation Angle - EarthRotationAngle.at per IERS Conventions 2010
  • Greenwich Mean Sidereal Time - GMST.at via ERA + polynomial
  • Terrestrial rotation - TerrestrialRotation.at for the R(ERA) × W matrix
  • Unified EOP - EOP.at and EOP.between composing all individual parameters
  • Leap seconds - LeapSecond.at for TAI-UTC lookup with binary search; LeapSecond.next_scheduled for the next known transition
  • TAI utilities - TAI.utc_to_tai and TAI.tai_to_utc for UTC↔TAI conversion
  • Bundled data - ships a finals2000A.all and Leap_Second.dat snapshot for out-of-the-box usage with no network calls required
  • Data management - Data.update! downloads fresh files with atomic writes and redirect handling; Data.ensure_fresh! raises StaleDataError when coverage is insufficient; DataStatus reports bundled/cached/custom state
  • Configuration - IERS.configure for data paths, interpolation method (:lagrange or :linear), Lagrange order, freshness thresholds, and download URLs; per-query interpolation: override on all .at methods
  • Time inputs - all query methods accept Time, Date, DateTime, Modified Julian Date (float), or Julian Date (float)
  • Data quality - every Entry exposes observed? and predicted? predicates via the HasDataQuality mixin; date via HasDate
  • Lazy enumerators - between returns a lazy Enumerator for memory-efficient iteration over large date ranges
  • Thread safety - mutex-protected lazy caching in Data and LeapSecond
  • Error hierarchy - IERS::Error base with ConfigurationError, DataError, DownloadError, ParseError, OutOfRangeError, and StaleDataError
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