JPALS Performance Model Using a Flexible Simulation Framework

Andrew Brown, Peter O'Keefe, Aleksandar Jovancevic and Suman Ganguly

Abstract:	A flexible simulation with high fidelity is necessary for predicting JPALS performance. The JPALS Performance Model provides a simulation tool for incorporating various models from different organizations into a common user interface and system framework. The goal of the JPALS Performance Model is to provide an end-toend simulation environment to evaluate JPALS performance in a wide-range of operational environments. The simulation includes models of ship and aircraft motion, GPS signal simulation including multipath, jamming and environmental effects, communications and datalink simulation and navigation algorithm implementation. Available simulation technology unnecessarily complicates the incorporation of these various models into a coherent and structured system. Challenges include inter-process communication and a lack of standard user and system interfaces. The complex interrelationships between model sub-systems, such as those found in the JPALS Performance Model, are difficult to separate and integrate. In addition, users often wish to utilize different models of the same sub-system for comparison. A flexible architecture is described that allows the user to conveniently and quickly execute a virtually limitless variety of scenarios for simulation. Various models are graphically represented as objects on screen and different models of similar sub-systems can be seamlessly exchanged. The architecture has been utilized to implement a standard interface and framework for the JPALS Performance Model. This implementation encapsulates various disparate sub-system models into uniform wrappers. There are no hidden dependencies between components. Each performs a single aspect of the total simulation. This implementation utilizes the correct level of granularity and cohesiveness to simplify the integration and utilization of various sub-system models and maintains complete user flexibility in configuring and executing simulation runs.
Published in:	Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005) September 13 - 16, 2005 Long Beach Convention Center Long Beach, CA
Pages:	2923 - 2929
Cite this article:	Brown, Andrew, O'Keefe, Peter, Jovancevic, Aleksandar, Ganguly, Suman, "JPALS Performance Model Using a Flexible Simulation Framework," Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005), Long Beach, CA, September 2005, pp. 2923-2929.
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