Assertion: radio wave's frequency | /r/HasProperty | attenuated along the path
Facets:
value: at wavelengths
type: OTHER
Source sentences:
text: Early long-distance services used surface wave propagation at very low frequencies, which are attenuated along the path at wavelengths shorter than 1,000 meters.
text: Early long-distance services used surface wave propagation at very low frequencies, which are attenuated along the path.