| 释义 |
radar horizon
radar horizonThe locus of points at which the rays from a radar antenna become tangential to the Earth's surface. On the open sea this locus is horizontal, but on land it varies according to the topographical features of the terrain.
radar horizon
radar horizon[′rā‚där hə‚rīz·ən] (navigation) The distance to which a radar's operation is limited by the quasi-optical characteristics of the radio waves employed. radar horizonThe line at which direct radar rays are tangential to the earth's surface. On the open sea, the radar horizon is horizontal, but, on land, it varies according to the topographical features of the terrain. The radar horizon is one of the determining factors for the limits of the pickup range of the radar. The radar pickup range in nautical miles is equal to the square root of 1.5 times the radar aerial height in feet.FinancialSeehorizon |