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Virtual Airspace Simulation Technologies (VAST) Sub-Project 
The Virtual Airspace Simulation Technologies (VAST) element supports the VAMS Project's objective of developing and benchmarking a set of analytical models to assess air transportation operational concepts. VAST is developing both a non-real-time modeling environment for system-wide assessments and a real-time modeling environment for specific human performance assessments. These modeling and simulation environments are being developed to support airspace concept definition efforts within the System Level Integrated Concepts (SLIC) Sub-project and concept evaluation efforts within the System Evaluation and Assessment (SEA) Sub-project. The primary tool being developed is the Airspace Concept Evaluation System (ACES) - a non-real-time simulation environment composed of interoperable models representing the gate-to-gate actions and highly coupled interactions of the key components of the air transportation system. VAST's second task involves developing and validating a real-time simulation system composed of software models and human interfaces integrated with a network of human-in-the-loop labs and facilities providing an environment for high-fidelity human performance and human factors studies.
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