WEBVTT

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We communicate with the JUNO spacecraft
with radio waves and radio frequencies. 

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But what we do is we send up commands
or data to the spacecraft to tell it what to do 

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it in turn takes data and sends back what we call telemetry

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...the way that we find out if there's a problem
on the spacecraft in space is by monitoring our telemetry 

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and our spacecraft talks to us on Earth
through the Deep Space network

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the Deep Space network is a set of antenna that we use that are around the world
in order to return data to us and to send commands up to the spacecraft.

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We designed a lot of points on the spacecraft that tell us things like
the state of charge of the battery what temperature things are at...

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... and we look at that telemetry and monitor
if the spacecraft is happy or sad and doing well or not

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and we set limits on that so it will give us automatic alerts if something's wrong,

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and so on the ground we can look at it and make sure
every thing's okay, we can detect a problem that way.