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United States national radio quiet zone
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United States national radio quiet zone

The United States National Radio Quiet Zone is a large area of land surrounding the the National Radio Astronomy Observatory (NRAO) near Green Bank, West Virginia.

This was established by the Federal Communications Commission in 1958 to protect the facilities' radio telescopes from harmful interference.

Not all radio transmissions are prohibited, but station owners must typically coordinate their operations with representatives of the NRAO.

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