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line of sight |
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line of sight An unobstructed view from transmitter to receiver. Satellite, infrared (IR) and microwave transmissions require line of sight between nodes, whereas portable phones, cellphones and wireless LANs (Wi-Fi) do not. Bar code systems must also have line of sight between the scanner and the printed bar codes on items. Contrast with RF.line of sight [′līn əv ′sīt] (electromagnetism) The straight line for a transmitting radar antenna in the direction of the beam. (science and technology) A straight, unobstructed path or line between two points, as between an observer's eye and a target. line of sight, line of collimation The line extending from an instrument along which distant objects are seen, when viewed with the telescope or other sighting device. Also see sight line. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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