Since 1979, ATAC has provided simulation and analysis to the aviation community. ATAC's dedicated staff is passionate about the development and application of computer models, simulations, decision aids, and analysis tools. ATAC's comprehensive services include - Airport planning, Airspace operations design and analysis, Environmental impact assessment, Military aviation, model development and operational performance analysis. ATAC's state-of-the-art products - Simmod PRO!, Aviation Environmental Design Tool (AEDT), Graphical Airspace Design Environment (GRADE), Range, Airspace and Airfield Data Analysis and Reporting System (RAADARs) and SkyView.