GN&C fault protection

Addressing fault tolerance for spacecraft Guidance, Navigation, and Control has never
been easy. Even under normal conditions, these systems confront a remarkable blend of
complex issues across many disciplines, with primary implications for most essential
system functions. Moreover, GN&C must deal with the peculiarities of spacecraft
configurations, disturbances, environment, and other physical mission-unique constraints
that are seldom under its full control, all while promising consistently high performance.