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Radio path locating (RDF) – this is the common system, utilised since the early 1900s, of employing specialised radio receivers with directional antennas (RDF receivers) to find out the precise bearing of a radio sign, to ascertain the location from the transmitter. The situation of the terrestrial transmitter might be https://charliexqepy.is-blog.com/36212479/top-surround-sound-system-secrets

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