2025-04-10  Orekit 13.0 released

The Orekit team is pleased to announce the release of Orekit version 13.0

Highlights in the 13.0 release are:

• revamp of tropospheric models,
• revamp of {Field}ImpulseManeuver,
• revamp of absolute dates with attoseconds precision,
• revamp of numerical integration tolerances,
• many improvements in optimal control
  • min time Hamiltonian
  • cost evaluation
  • differential information at control switches,
  • linear system tuning,
  • logarithmic barrier for fuel cost,
  • cost/penalty barrier for indirect fuel optimization,
  • scales in Newton updates,
• new Kalman/unscented smoother,
• many improvements in GNSS
  • Rinex files,
  • Sinex files,
  • partial derivatives in GNSS propagators,
  • handling of ambiguities,
  • non-standard signals and systems,
• new ITU models
  • ITU-R P.531 NeQuick 2 ionospheric model,
  • ITU-R P.834 tropospheric model,
• replacement of AdditionalStateProvider by AdditionalDataProvider,
• builders for {Field}SpacecraftState,
• moved position angles conversions methods,
• IIRV messages reader/writer,
• sexagesimal angles,
• moving transition dates in TimeSpanMap,
• new East-North-Up (ENU) and North-East-Down (NED) local orbital frames,
• {Field}EventDetectionSettings,
• Walker constellation for star pattern,
• magnetic field loading from DataSource,
• removed orbit-related chained getters in {Field}SpacecraftState,
• a posteriori filtering feature for generated measurements,
• switched default PositionAngleType in {Field}NumericalPropagator to ECCENTRIC,
• improvement in the conversion of osculating elements into mean elements for analytical theories:
  • Brouwer-Lyddane,
  • Eckstein-Hechler,
  • DSST,
  • SGP4/SDP4 (i.e. forTLE),
• generalized ProfileThrustPropulsionModel,
• all ForceModel and AttitudeProvider working with AbsolutePVCoordinates,
• alternative to AttitudesSequence with instantaneous switches,
• AttitudeProvider now inheriting from EventDetectorsProvider and ParameterDriverProvider,
• {Field}Orbit always containing rates (possibly Keplerian),
• ThirdBodyAttraction can be defined without CelestialBody,
• AdaptableInterval now taking boolean argument on direction of propagation,
• native AdaptableInterval for date detection,
• changed production branch name in the git repository from master to main.

This version depends on Hipparchus 4.0.1.

For complete release notes please see: https://www.orekit.org/site-orekit-13.0/changes-report.html

The maven artifacts are available in maven central. The source and binaries can be retrieved from the forge releases page: https://gitlab.orekit.org/orekit/orekit/-/releases

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