::: nBlog ::: Services like marinetraffic.com and flightradar24.com have recently become quite popular, due to widespread media references during air disasters and e.g. the recent submarine hunting operation in Sweden. Marinetraffic.com collects and maps standard marine AIS messages on VHF frequencies 161.975 and 162.025 MHz; flightradar24 listens to the ADS-B air radar signal on 1.090 GHz and […]
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