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Now it can be told

作者:籍軎亳    发布时间:2019-03-06 11:04:02    

By Barry Fox When British government censors first read a radar patent that the electronics company Marconi filed in 1982, they immediately slapped a secrecy order on it. After 18 years, the government now thinks it is safe to reveal details (GB 2 341 994). Radar can produce false readings when, for example, the signal is reflected by more than one surface. Marconi’s engineers analysed the spurious signals and found that they only lasted a few milliseconds. In Marconi’s patent,

 

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