Small satellites, and in particular Cube Sats, are evolving from education and technology mission types to science and critical Earth observation type missions. Some of these more complex missions involve monitoring a nations critical infrastructure and thereby becoming a component of a nations space critical infrastructure. This integration into the system of space critical infrastructure requires that the design of these small satellite systems become resilient to insure an appropriate level of mission assurance. A resilient system represents an engineered system that has the capability to resume its designed functionality after a failure from an unexpected event. The resumption of capability needs to occur within a short amount of time either through reconfigurability or through timely replacement. This paper will discuss a small satellite design architecture and design framework that will result in a resilient system that maintains the operational philosophy of small satellites that will mitigate the growth in size, mass, and power (SMAP) and cost that normally occurs with developing systems in a risk-adverse manner. To achieve the above design goals will be to design based on a heterogeneous suit of small satellites with a design process that is correct-wrt-requirements to achieve are silient system.
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