Title:
Survivability and Resiliency of Spacecraft and Space-Based Networks: a Framework for Characterization and Analysis, Version 1
Survivability and Resiliency of Spacecraft and Space-Based Networks: a Framework for Characterization and Analysis, Version 1
Author(s)
Castet, Jean-Francois
Saleh, Joseph H.
Saleh, Joseph H.
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Abstract
Considerations of survivability and resiliency have always been of importance in the
design and analysis of military systems. Over the past two decades, the importance of
survivability and resiliency has expanded beyond military systems to include public
networks and infrastructure systems. The analysis and assessment of networked systems
with respect to survivability has become particularly acute in recent years, as attested to by
a growing technical literature on the subject.
In this paper, we bring these considerations of survivability and resiliency to bear on
spacecraft and space-based networks. We develop a framework for comparing the
survivability and resiliency of different space architectures, namely that of a monolithic
design and a distributed (or networked) space system architecture. There are multiple
metrics along which different space architectures can be benchmarked and compared. We
argue that if survivability and resiliency are not accounted for, then the evaluation process is
likely to be biased in favor of monolithic spacecraft. We show that if in a given context
survivability and resiliency are an important requirement for a particular customer, then a
distributed architecture is more likely to satisfy this requirement than a monolithic
spacecraft design.
We discuss in the context of our framework different classes of threats, as well as the
high-frequency and low-frequency system response to (or coping strategies with) these
shocks or damaging events. We illustrate the importance of this characterization for a
formal definition of survivability and resiliency and a proper quantitative analysis of the
subject. Finally, we propose in future work to integrate our framework with a design tool
that allows the exploration of the design trade-space of distributed space architecture and
show how survivability can be “optimized” or traded against other system attributes.
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Date Issued
2008-09
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Paper