Alexander Stepanovich Popov presented his radio receiver, refined as a lightning detector, to the Russian Physical and Chemical Society.

Alexander Stepanovich Popov (1859 –1906) was a Russian physicist, who was one of the first persons to invent a radio receiving device.

On 7 May 1895, he presented a paper on a wireless lightning detector he had built that worked via using a coherer to detect radio noise from lightning strikes. In a 24 March 1896 demonstration, he transmitted radio signals 250 meters between different campus buildings in St. Petersburg.

A lightning detector at the Kennedy Space Center in Florida. http://thunder.msfc.nasa.gov/validation/validation.html

A lightning detector is a device that detects lightning produced by thunderstorms. There are three primary types of detectors: ground-based systems using multiple antennas, mobile systems using a direction and a sense antenna in the same location (often aboard an aircraft), and space-based systems.

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