Range Safety Modeling in the Virtual Test Bed

L. Rabelo, J. Sepulveda, and J. Park (USA)


Modelling, simulation, safety, NASA Space Shuttle, toxics, geographical information systems


This paper describes the steps taken to incorporate the Virtual Range model into the Virtual Test Bed (VTB) infrastructure. The Virtual Test Bed is a prototype of a virtual engineering environment to study operations of current and future space vehicles, spaceports, and ranges. The High-Level Architecture (HLA), as defined by the Department of Defense, is the main environment. The VTB/HLA implementation described here represents different systems that interact in the simulation of a Space Shuttle liftoff. The Virtual Range model represents the different systems that interact in the determination of the expectation of casualties (Ec) resulting from the toxic effects of the gas dispersion that occurs after a disaster affecting a Space Shuttle within 120 seconds of liftoff. The scope for Ec calculation is restricted to toxic gas dispersion, and we focus on displaying boundaries for Ec = 30x10-6. We have modified the example of the VTB/HLA implementation to add the VR as a third federate. A potential application of this enhanced VTB/HLA implementation is to study the risk associated to existing and contemplated Launch Weather Criteria.

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