• Electrostatic Approach for Mitigation of Communication Attenuation During Directed Energy Testing

      Kundrapu, Madhusudhan; Keidar, Michael; Jones, Charles; George Washington University; Edwards Air Force Base (International Foundation for Telemetering, 2009-10)
      Electrostatic approach is considered for mitigation of communication attenuation during the testing of laser powered directed energy weapon. Mitigation analysis is carried out for two target materials Al and Ti. Plasma parameters are obtained using one dimensional coupled analysis of laser-target interaction. Influence of laser beam frequency on plasma parameters is addressed. Sheath thickness is obtained using transient sheath calculations. It is found that uninterrupted telemetry can be achieved | using a maximum bias voltage of 10 kV, through Al plasma for fluences below 5 J/cm² and through Ti plasma for fluences below 2 J/cm².
    • A Model-Based Methodology for Managing T&E Metadata

      Hamilton, John; Fernandes, Ronald; Darr, Timothy; Graul, Michael; Jones, Charles; Weisenseel, Annette; Knowledge Based Systems, Inc.; Edwards Air Force Base (International Foundation for Telemetering, 2009-10)
      In this paper, we present a methodology for managing diverse sources of T&E metadata. Central to this methodology is the development of a T&E Metadata Reference Model, which serves as the standard model for T&E metadata types, their proper names, and their relationships to each other. We describe how this reference model can be mapped to a range's own T&E data and process models to provide a standardized view into each organization's custom metadata sources and procedures. Finally, we present an architecture that uses these models and mappings to support cross-system metadata management tasks and makes these capabilities accessible across the network through a single portal interface.
    • Semantic Web Technologies for T&E Metadata Verification and Validation

      Darr, Timothy; Fernandes, Ronald; Hamilton, John; Jones, Charles; Weisenseel, Annette; Knowledge Based Systems, Inc.; Edwards Air Force Base (International Foundation for Telemetering, 2009-10)
      The vision of the semantic web is to unleash the next generation of information sharing and interoperability by encoding meaning into the symbols that are used to describe various computational capabilities within the World Wide Web or other networks. This paper describes the application of semantic web technologies to Test and Evaluation (T&E) metadata verification and validation. Verification is a quality process that is used to evaluate whether or not a product, service, or system complies with a regulation, specification, or conditions imposed at the start of a development phase or which exists in the organization. Validation is the process of establishing documented evidence that provides a high degree of assurance that a product, service, or system accomplishes its intended requirements. While this often involves acceptance and suitability with external customers, automation provides significant assistance to the customers.