2024-10-18  Orekit 12.2 released

The Orekit team is pleased to announce the release of Orekit version 12.2.

This is a minor release of Orekit, including new features and bug fixes. Main changes are:

• Introduction of indirect optimal control
  • Adjoint equations as defined by Pontryagin’s Maximum Principle with Cartesian coordinates for a range of forces: (gravitational, inertial) including J2
  • So-called energy cost functions (proportional to the integral of the control vector’s squared norm), with Hamitonian evaluation
  • Single shooting based on Newton algorithm for the case of fixed time, fixed Cartesian bounds
• Attitude
  • Implementation of attitude provider with primary target and secondary constraint
• Data parsing
  • Implementation of a parser for GRGM1200B-like gravity models
• Noticeable bug fixes
  • Use proper body-fixed (ITRF) frame in DSST zonal (see Issue 1104)
  • A long standing bug on the Brouwer-Lyddane model has been fixed (see Issue 947)
• Miscelleneous
  • Impulsive maneuvers can now be added to relevant PropagatorBuilder
  • PropagatorBuilder are now cloneable
  • Closing gap in implemented methods between classes and their field equivalent
  • Implementation of several quality of life methods
  • Several bug fixes

This version depends on Hipparchus 3.1.

For complete release notes please see: https://www.orekit.org/site-orekit-12.2/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

Orekit 12.2 - Java Tutorials

The Java tutorials were also updated to Orekit 12.2.

Orekit tutorials 12.2 contains:

• A new tutorial for indirect (single) shooting method
• A new tutorial for plotting groundtracks

The sources can be downloaded from the orekit-tutorials forge release page or directly from Orekit website download page .

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