The src/tutorials/java directory contains sources for example use of the library. The src/tutorials/resources directory contains example data. The src/design directory contains pieces for a UML model of the library. Orekit relies on the following free software, all released under business friendly ...
- set the source folders to orekit/src/main/java, orekit/src/main/resources, orekit/src/test/java, orekit/src/test/resources, orekit/src/tutorials in the source tab of the Configure Build Path dialog - set the external libraries to JRE system library (provided by Eclipse), ...