The LTR models and documentation are constantly evolving. This wiki documents the latest release. In some cases, this includes documentation for unreleased/upcoming features. You should make pay attention to the LTR-announce mailing list and make sure you're using the latest release. You can find a list of upcoming features via the LTR roadmap.
The LTR suite is a set of coupled models and this documentation is focused on the coupling. Individual models may have limited documentation in this wiki. See the child pages below for additional documentation on specifics of the models and tools.