Emergency Links: NIST Identifies 'Sweet Spot' for Radios in Tunnels (IMAGE)

National Institute of Standards and Technology (NIST)

Emergency Links: NIST Identifies 'Sweet Spot' for Radios in Tunnels

Caption

Electronics engineer Dennis Camell (foreground) aligns antennas in an old California silica mine for a NIST study identifying optimal frequencies for radio signal transmissions in tunnels.

Credit

Credit: G. Koepke/NIST

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