DINaMo Group, MIT

ALT Graph Neural Network Architecture. Each satellite within the environment is represented as a node, and communications between satellites are represented as edges. Each node represents a particular spacecraft, which means that that specific node can encode specific qualities including size of the spacecraft, its capabilities, and its precise location. Each edge represents communication and sensing abilities, so they can encode qualities related to the relative information between two satellites including their relative distances, the areas they have both surveyed or other characteristics associated with path planning. Our graph formulation is dynamic, meaning that the over the course of the simulation, the satellites can adaptively connect and disconnect with one another depending on the satellites ability to sense those in their proximity. We rely on a unified message passing model (UniMP), a variant of a graph transformer, to allow the agents to selectively prioritize messages coming