Paul J. Cefola

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High fidelity orbit propagation requires detailed knowledge of the solar radiation pressure (SRP) on a space object. The SRP depends not only on the space object's shape and attitude, but also on the absorption and reflectance properties of each surface on the object. These properties are typically modeled in a simplistic fashion, but are here described by(More)
This paper shows an approach to improve the statistical validity of orbital estimates and uncertainties as well as a method of associating measurements with the correct resident space objects and classifying events in near realtime. The approach involves using an adaptive Gaussian mixture solution to the Fokker-Planck-Kolmogorov equation for its(More)
There is a growing international need for Space Situational Awareness (SSA), defined as knowledge of objects in Earth orbit and the space environment. Up until recently, the majority of SSA has primarily been done by the United States and Russia, which currently operate significant space surveillance tracking networks and maintain catalogs of space objects.(More)
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