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radars emit and/or receive multiple beams of radio waves at two or more elevation angles. By comparing the relative strengths of the returns from each beam, the elevation of the target can be deduced. An example of a stacked beam radar is the
57:. Interceptors must be told the altitude to climb to before making an intercept. Before the advent of single unit 3D radars, this was achieved with separate search radars (giving range and azimuth) and separate
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ranging and direction in three dimensions. In addition to range, the more common two-dimensional radar provides only azimuth for direction, whereas the 3D radar also provides elevation. Applications include
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that could examine a target to determine altitude. These had little search capability, so were directed to a particular azimuth first found by the primary search radar.
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Diagram of a typical 3D radar, a judicious mix of vertical electronic beam steering and mechanically horizontal movement of a pencil-beam
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The information provided by 3D radar has long been required, particularly for air defence and
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through a scan pattern to build a 3-D picture. Examples include
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154:US-made transportable PESA 3D air search radar
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73:Diagram of a typical 2D radar rotating
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106:(which uses a parabolic dish) and the
121:and other ships so equipped with the
111:passive electronically scanned array
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190:"ESR 360L 3D Surveillance Radar"
196:from the original on 2006-09-23
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134:Air Route Surveillance Radar
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148:, British aircraft carriers
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75:cosecant squared antenna
119:guided missile cruisers
113:radar employed by the
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59:height finding radars
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50:, and surveillance.
123:Aegis Combat System
171:"CEA FAR 3D Radar"
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44:weather monitoring
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158:Ghamar (3D radar)
115:Ticonderoga class
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173:. Archived from
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92:radars steer a
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164:External links
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146:Type 984 radar
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21:Type 984 radar
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177:on 2004-08-13
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37:provides for
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198:. Retrieved
179:. Retrieved
175:the original
129:Stacked beam
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90:Steered beam
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55:interception
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94:narrow beam
48:air defense
200:2006-05-16
181:2004-10-31
65:Techniques
27:Victorious
152:AN/TPS-75
25:HMS
212:Category
194:Archived
140:See also
108:AN/SPY-1
77:pattern.
35:3D radar
101:Doppler
98:NEXRAD
30:, 1961
218:Radar
39:radar
117:of
23:on
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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