i was a programmer on the following Simulation (one of many used in the Korean exercise now called Ulchi Freedom Guardian)
AWSIM is a suite of trajectory, simulation, conflict prediction, conflict resolution and metric tools that can perform a wide range of air traffic simulation and evaluation tasks. AWSIM, through the utilization of several intertwined modules can upgrade the quality of FAA's analyses efforts substantially. These capabilities include manipulating 4-dimensional flight trajectories, identifying and resolving aircraft-to-aircraft and aircraft-to-airspace conflicts, evaluating future concepts such as reduced horizontal and mixes, new routings, varying weather conditions, direct and wind-optimal routing can all be measured using AWSIM. Ouputs from the simulations include sector load metrics, sector efficiency (fuel burn, miles traveled in sector, time of saturation) and trajectory and traffic patterns.