Assertion: search radar | /r/HasProperty | dual mode
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Search radar that include pulse-Doppler are usually dual mode because best overall performance is achieved when pulse-Doppler is used for areas with high false alarm rates (horizon or below and weather), while conventional radar will scan faster in free-space where false alarm rate is low (above horizon with clear skies).