Communication and Data Handling

"The communications system returns science data, that is passed on to the scientists,  and 'housekeeping' data, called telemetry, which allows engineers back on Earth to monitor the condition of the spacecraft. The on-board communications system also receives all incoming commands." (ESA, 2013)

Sources

"Anatomy of a spacecraft". Space Science, ESA. Last modified June 12, 2013.
https://www.esa.int/Our_Activities/Space_Science/Anatomy_of_a_spacecraft.
Accessed February 1, 2019.