Obtaining the Source Code
The Ring Current-Atmosphere Interactions Model with Self-Consistent Magnetic Field (RAM-SCB) can be freely downloaded from https://github.com/lanl/RAM-SCB.
This open source software has been authored by an employee or employees of Los Alamos National Security, LLC, operator of the Los Alamos National Laboratory (LANL) under U.S. Government contract DE-AC52-06NA25396 with the U.S. Department of Energy. The U.S. Government has rights to use, reproduce, and distribute this software. Neither the Government nor LANL makes any warranty, express or implied, or assumes any liability for the use of this software. If software is modified to produce derivative works, such modified software should be clearly marked, so as not to confuse it with the version available from LANL.
The Space Weather Modeling Framework (SWMF) code can be downloaded free of charge here.
A brief description of SHIELDS and its components may be found in the user manual.