A PPI (Plan Position Indicator) is obtained from a single radar scan (3600) with the antenna elevation fixed at 00 (zero degree). Its maximum range is 450 km from the radar. Since a microwave pulse emitted by a radar propagates approximately straight, the radar beam would be at 12 km height at a distance of 450 km. Therefore, distances of radar observation beyond 450 km range would have little significance for detection of meteorological targets, once the beam is above the precipitation areas.
path of sheaf in zero degrees |
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