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An explicit guidance system based on neural networks is proposed. The steering law is a function of parameters that are set up according to some optimal criterion. Optimization can be carried out either by semi-analytical approximated methods or by numerical methods. By optimization a guidance function is defined p = G (X,t) which transforms the current state of the system X into the optimal parameters...
Orbital break-ups produce a large number of fragments, which constitute an obvious hazard for other satellites in nearby orbits. Of these fragments, many are too small to be detected by ground-based facilities: this leads to the need for mathematical modelling as a tool for adequate risk analysis. In this paper an average spatial density model is presented. It is based on the Gauss analogy and,...
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