Music. Jim Garvin: Once our Design phase has given us a good map of what a satellite should look like, and exactly what it must do, we need to put it together. Now our satellites are assembled from a great many pieces from cooperating manufacturers and engineers here at Goddard have to specify exactly how those manufacturers should develop and manufacture these pieces. One of the key parts of that is specifying the exact, crystal-clear details on the size, the power, the data rate for those parts. The next step, once all these parts are developed, is to assemble them in a phase called Integration. Now this is essential. We have all these parts, we need to put them together just right in just the right sequence to make our spacecraft. Now one of the key concern in integration is contamination. We actually need something called a clean room, which is very much like a hospital operating room to do this just right. This is because in the harsh environment of space, our sensitive instruments and these sensitive robotic spacecraft could be damaged if we're not careful. In fact, in the High Bay Clean Room here at Goddard, which is ten stories high, one of the biggest on Earth, we are more capable of assembling spacecraft to a standard of cleanliness than anywhere else in the world. This is essential if our spacecraft are going to work just right in space.