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Elevation Angle 3 °

Limit Line of Building Height. Limit Line of Building Height. Elevation Angle 3 °. Elevation Angle 3 °. Horizontal Plane. Horizontal Plane. H. A. Ground. Ground. D. A < H + D tan 3 ° A = Height of the building H = Height of the antenna pedestal bottom above the ground

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Elevation Angle 3 °

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  1. Limit Line of Building Height Limit Line of Building Height Elevation Angle 3 ° Elevation Angle 3 ° Horizontal Plane Horizontal Plane H A Ground Ground D A < H + D tan 3 ° A = Height of the building H = Height of the antenna pedestal bottom above the ground D = Horizontal distance between the bottom center of an antenna pedestaland the building Sketch 1

  2. 0.5° Building Height Limit Height of Antenna Tower (30m) 186 m 186 m ~498 m The radius of clearance zone surrounding a weather radar antenna is described as follows： For the zone 0 - 186 m, the height limit of surrounding buildings is 30meters. Zone of the minimal discernible signal：(Pulse width) ×(Wave speed)÷2＋(Distance between the plane of antenna disk and central axis of pedestal) As for the CWB’s Doppler weather radar : (3.3 × 10-6)× (3 × 108)÷2＋3 ＝ 498 m Sketch 2

  3. Limit Line of Building Height Limit Line of Building Height Elevation Angle 3 ° Elevation Angle 3 ° Horizontal Plane Horizontal Plane A H Ground Ground A < H + D tan 3 ° A = Height of a building H = Height of the bottom center of the antenna pedestal above the ground D = Horizontal distance between the bottom center of the antenna pedestaland the surrounding building Sketch 3

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