AUTHOR=Denton Richard E. , Takahashi Kazue , Hartley David P. TITLE=Models for plasmasphere and plasmatrough density and average ion mass including dependence on L, MLT, geomagnetic activity, and phase of the solar cycle JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=11 YEAR=2025 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2024.1459281 DOI=10.3389/fspas.2024.1459281 ISSN=2296-987X