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In aerospace
Aerospace is a term used to collectively refer to the atmosphere and outer space. Aerospace activity is very diverse, with a multitude of commercial, industrial and military applications. Aerospace engineering consists of aeronautics and astrona ...
, Assembly, Test, and Launch Operations (ATLO), also known as Mission System Integration and Test (MSIT) is the phase of a spacecraft project that comprises building the spacecraft, testing it, and getting it launched.
References
Aerospace engineering {{NASA-stub