Omega system performance assessment

The Omega system availability model permits a probabilistic assessment of Omega performance using receiver reliability, transmitting station availability, and the global coverage of usable signals in combination with the specification of geographic operating region priorities. Applications of the system availability model, utilizing PACE (performance assessment and coverage evaluation), are presented and interpreted to demonstrate the utility of the methodology and the associated performance of the Omega system under realistic operational conditions. Both spatial and temporal performance characteristics are presented, with specific emphasis placed on the interests of the current users of Omega. Although the model has been specifically developed and applied to Omega, the underlying fundamentals have the potential for a common probabilistic characterization of systems, and combinations of systems, including Loran-C, Navstar GPS (Global Positioning System), and GLONASS.<>