Blackbird is an object-oriented discrete event simulator intended as a multi-mission spacecraft simulation framework that enables engineers to write code in a standard language that is executed directly by an industry-standard interpreter. The framework provides basic classes that engineers can extend; those base classes contain minimalistic machinery that governs the order in which activity instances are placed and executed, how information appears in output files, the ways one can interact with the model, and more. The language chosen for the core and mission-specific code was Java due to its strong object-oriented nature, reflection capabilities, and the way it lends itself to more maintainable code.

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