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(music)

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(Jim Garvin) Once our design phase has given us a good map of what a satellite should look

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like, and exactly what it must do, we need
to put it together. Now our satellites

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are assembled from great many pieces
from cooperating manufacturers. And

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engineers here at Goddard have to
specify exactly how those manufacturers

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should develop and manufacture these
pieces. And one of the key parts of that

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is specifying the exact, crystal-clear
details on the size, the power, the data

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rate for those parts. The next step, once
all these parts are developed, is to

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assemble them in a phase we call
integration. Now this is essential. We

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have all these parts, we need to put them
together just right in just the right

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sequence to make our spacecraft. Now one of the key concerns and integration is

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contamination. We actually need something called a cleanroom,

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which is very much like a hospital
operating room to do this just right.

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This is because in the harsh environment
of space, our sensitive instruments and

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the sensitive robotic spacecraft could
be damaged if we're not careful. In fact,

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in the high bay cleanroom here at
Goddard, which is 10 stories high, one of

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the biggest on Earth, we are more capable of assembling spacecraft to a standard

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of cleanliness than anywhere else in the
world. This is essential if our

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spacecraft are going to work just right
in space.