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aerial |
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aerial: see antenna antenna (ăntĕn`ə) ..... Click the link for more information. , in electronics. antennaor aerialComponent of radio, television, and radar systems that directs incoming and outgoing radio waves. Usually of metal, antennas range in shape and size from the mastlike devices used for radio and television broadcasting to the large parabolic reflectors used to focus satellite signals and the radio waves generated by distant astronomical objects and reflect them toward the centrally located receiver. Antennas were invented in the 1880s by Heinrich Hertz; Guglielmo Marconi made many improvements. aerial 1. of or relating to aircraft 2. the part of a radio or television system having any of various shapes, such as a dipole, Yagi, long-wire, or vertical aerial, by means of which radio waves are transmitted or received |
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In 1994, 5,500 bait doses were also distributed aerially along the
ravine systems from a Turbo Beaver aircraft flying at an altitude of 150
m with an approximate airspeed of 140 km/hr. "We load planes up with a payload of grass seed, lime and
fertilizer, and we aerially treat these areas by dumping this mixture
onto a section of land that's relatively inaccessible by any other
means," says Quentin Smith, environmental engineer, Inco's
Environment, Health and Safety Department. The children of three small agriculturally based
towns located in the Yaqui Valley were examined; the fields surrounding
the towns have monocropped fields with pesticide applied aerially. |
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