Introduction ============ The NCAR/HAO Thermosphere Ionosphere Electrodynamics General Circulation Model, or TIEGCM, is a three-dimensional, time-dependent, numeric simulation model of the Earth's upper atmosphere, including the upper Stratosphere, Mesosphere and Thermosphere. This document is intended to assist members of the upper atmosphere research community in building, executing, and visualizing the TIEGCM as an integral part of their research. We also welcome development efforts on the model itself, subject to the Academic Research License Agreement :download:`tiegcmlicense.txt <_static/tiegcmlicense.txt>`. For more information about the TIEGCM and other related models, please see: * `Main TGCM website `_ * :base_url:`TIEGCM Release Documentation ` for version |version|. * :base_url:`TIEGCM Model Description ` * `tgcmgroup email list `_ To contact a live body at NCAR/HAO, send email to Ben Foster at foster@ucar.edu (see also :ref:`Contact Information `)