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Illustration of the Aquarius/Satélite de Aplicaciones Científicas (SAC)-D satellite observatory in space with Earth in the background. Credit: NASA
Spotlight on Lessons Learned: SAC-D DC/DC Converter On-orbit Failures Likely due to Over-testing Prior to Usage

An international Earth-observing mission to study the salinity of the ocean surface ended in 2015 when an essential part of the spacecraft’s power and attitude control system stopped operating due to over-testing prior to launch. 

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