Cislunar Plasma Region Classification: Data, Models, and Code

Supplementary data, pre-trained model weights, training code, and hyperparameter optimization results for "Semi-Supervised Plasma Region Classification in Earth's Cislunar Magnetotail using ARTEMIS Observations" (Edmond et al., 2026). Contains 1.46 million ARTEMIS-P1 (THEMIS-B) observations (August 2011 – January 2025) with model-predicted plasma region labels (solar wind, magnetosheath, lobe, plasma sheet), pre-trained C-MMAE and SOM weights for three map size configurations, and Optuna HPO trial histories. The companion pip-installable inference package is available at https://github.com/jae1018/artemis-cmmae. Approved for public release; distribution is unlimited. Public Affairs release approval #AFRL20261291