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README.md 3.21 KiB

Orekit logo

Orekit

An accurate and efficient core layer for space flight dynamics applications

Orekit is a low level space dynamics library written in Java. Orekit is designed to be easily used in very different contexts, from quick studies up to critical operations. As a library, Orekit provides basic elements (orbits, dates, attitude, frames, ...) and various algorithms to handle them (conversions, propagations, pointing, ...).

Download

Official releases

Official Orekit releases are available on our Gitlab instance. They are also available in the Maven repository.

Development version

To get the latest development version, please clone our official repository and checkout the develop branch:

git clone -b develop https://gitlab.orekit.org/orekit/orekit.git

Note: Our official repository is mirrored on Github.

Documentation

Project overview, architecture and development, detailed features list, tutorials, Javadoc and a lot of other information is available on the Maven site.

Getting help

The main communication channel is our forum. You can report bugs and suggest new features in our issues tracking system.

Contributing

Orekit exists thanks to the contribution of many people.

If you are interested in participating in the development effort, subscribe to the forum and step up to discuss it. The larger the community is, the better Orekit will be. The main rule is that everything intended to be included in Orekit core must be distributed under the Apache License, version 2.0 (you will be asked to sign a contributor license agreement).

More information is available in our development guidelines.

Building

Detailed information on how to build Orekit from source either using Maven or Eclipse is provided in building.md file.

Dependencies

Orekit relies on the following free software, all released under business friendly free licenses.

Compile-time/run-time dependencies

  • Hipparchus from the Hipparchus project released under the Apache Software License, version 2

Test-time dependencies

  • JUnit 4 from Erich Gamma and Kent Beck released under the Eclipse Public License, version 1.0

  • Mockito from Szczepan Faber and others, released under MIT license.

More detailed information is available in the Maven site.

License

Orekit is licensed by CS Systèmes d'Information under the Apache License, version 2.0. A copy of this license is provided in the LICENSE.txt file.