Assertion: radio's receiver | /r/CapableOf | respond to echo
Facets:
value: in the waveguide
type: LOCATION
value: from dust particles
type: CAUSE
value: from misguided rf
type: OTHER
Source sentences:
text: In a typical plan position indicator (PPI) radar with a rotating antenna, this will usually be seen as a "sun" or "sunburst" in the centre of the display as the receiver responds to echoes from dust particles and misguided RF in the waveguide.