ATLO

In aerospace, 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.^[1]

Project Manager John Wirth with Flight Technician Kieran McKay with NASA's ISS-RapidScat.

Mars Science Laboratory Assembly, Test and Launch Operations (ATLO) at JPL

Pictured to the right is John Wirth (left) and Kieran McKay (right) at Kennedy Space Center with ISS-RapidScat, the radar scatterometer which was built at JPL. Specifically, they were testing the rotating radar's capabilities at the Space Station Processing Facility.^[2]