Prime Real Estate
Although radio spectrum spans hundred of billions of frequencies, which are measured in hertz, the lowest 1 percent of frequencies - those that fall below 3.1 gigahertz - account for 90 percent of the spectrum's use. Only a fraction of this region is set aside exclusively for government use, which is shared among DoD, NASA, the FAA, FBI, FEMA and other agencies.
| 15.6% | exclusive government use | |
| 37.7% | shared use | |
| 46.7% | exclusive non-government use |
Source: Defense Department and General Accounting Office
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