line of sight


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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.

line of sight

An unobstructed path from a transmitting device to the receiver. Users are aware of line of sight when they aim their infrared (IR) remote control directly at the TV. Microwave transmissions between towers at the top of mountains and buildings require unobstructed line of sight. See IR remote control.

Any Radio Frequency
Technically, line of sight refers to radio frequency (RF) transmission in general, including Wi-Fi and cellular. Although walls and other obstructions may attenuate (lessen) or block signals entirely, the receiving device must be in the radiation pattern emitted by the transmitter, which is also considered line of sight. See RF.
References in periodicals archive ?
Creating business-savvy employees through web sites such as Biz U or publications such as annual reports to employees are smart, effective ways for communicators to create a line of sight,
The team tentatively interprets these observations to mean that light from the two quasars traverses three or more "sheets" of galaxies, with each line of sight poking through different galaxies or clouds in the same cluster.
When astronomers determine the distances to galaxies along a long, narrow line of sight, they sample the distribution of matter in the universe in much the same way.
The most stringent limitations to wireless transmission are line of sight constraints and unpredictable channel conditions.
If this explanation holds, all the "superluminals" we see must be coming more or less straight at us; by definition it doesn't work for motions at right angles to our line of sight.
There were no Internet cable providers in the area, and the school is located in a valley surrounded by trees where line of sight to the High School 2.
5 miles outdoors with direct line of sight, and shorter distances without direct line of sight.
StoneBridge utilizes Line of Sight (LOS) and Non Line of Sight (NLOS) technologies to transmit signal from centrally located towers to customer locations.