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Janus

Janus is a domain-specific language for spacecraft operations and command sequences. The language has been used by NASA’s Jet Propulsion Laboratory, and it's part of the Cosmos framework for flight software development. Janus provides formal syntax and semantics to describe mission planning activities, including pre-launch preparations and in-flight operational tasks. It's designed to be user-friendly enough for engineers who are not necessarily software experts but need to create complex command sequences that have tight timing constraints or involve coordination between multiple spacecraft subsystems. With its graphical user interface, Janus lets users visualize the sequence of commands in space missions.

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