A prototype star-topology radio system on the 169 MHz ISM band, with DCF-synchronized time slots and GPS-timed detector firmware, was built and field-tested for CREDO portable cosmic-ray detectors; measured urban coverage was partial.
It should be remembered that the waves are reflected and absorbed by buildings, hence the range in urban areas is always smaller than in open areas
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A communication solution for portable detectors of the Cosmic Ray Extremely Distributed Observatory
A prototype star-topology radio system on the 169 MHz ISM band, with DCF-synchronized time slots and GPS-timed detector firmware, was built and field-tested for CREDO portable cosmic-ray detectors; measured urban coverage was partial.