TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Spatial coherence [...] measures the area over which light is coherent. Strictly speaking, it is independant of temporal coherence. If a laser emits a single transverse mode, its emission is spatially coherent across the diameter of the beam, at least over reasonable propagation distances.  3, record 1, English, - spatial%20coherence

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

La cohérence spatiale est reliée à la corrélation des champs électriques en deux points perpendiculairement à la direction de propagation du faisceau; une cohérence spatiale élevée signifie que le front d'onde d'une source est régulier et implique la capacité de produire, au moyen de lentilles, une tache focale très fine, parfois de l'ordre de la longueur d'onde, ou encore un faisceau à la fois très peu divergent et de faible largeur (ex. pointeur laser).  3, record 1, French, - coh%C3%A9rence%20spatiale

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

By applying a sufficiently strong magnetic field the configuration could be influenced and-or a propagation window by the so-called "whistler mode" could be produced.  1, record 2, English, - propagation%20window

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

On pourrait [...] agir sur le système en appliquant un champ magnétique suffisamment intense, ou réaliser une fenêtre de propagation en mettant en œuvre le mode de propagation dit par sifflements.  1, record 2, French, - fen%C3%AAtre%20de%20propagation

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Normalized frequency(V Number). A mathematical expression characterizing a fiber in terms of its essential data(core diameter, numerical aperture) and the wavelength. Important parameters such as number of modes, mode field diameter, cutoff wavelength, propagation constant and chromatic dispersion can be calculated using V number.  1, record 3, English, - normalized%20frequency

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Paramètre servant à déterminer le nombre moyen de modes de propagation pouvant coexister dans une fibre optique.  2, record 3, French, - fr%C3%A9quence%20normalis%C3%A9e

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A mode of propagation in which the energy is substantially confined within a tropospheric radio duct.  3, record 4, English, - trapped%20mode

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Mode de propagation selon lequel l'énergie se trouve en grande partie guidée à l'intérieur d'un conduit troposphérique.  2, record 4, French, - mode%20de%20propagation%20guid%C3%A9e

Record 4,  Textual support,  Spanish

Record number: 4, Textual support number: 1 DEF

Modo de propagación en el cual la energía es en gran parte guiada por el interior de un conducto troposférico.  2, record 4, Spanish, - modo%20de%20propagaci%C3%B3n%20guiado

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

ionospheric propagation mode. A single ray path between the transmitter and receiver. An ionospheric propagation path may comprise several different individual paths, all of which can propagate the signal from the transmitter to the receiver. The mode is labeled in terms of the number of reflections it experiences for each of the layers from which it is reflected. The simplest ionospheric mode is a single hop path having one reflection on the ionosphere... More complex modes can have several reflections from a layer... and may also have reflections from more than one layer...  3, record 5, English, - ionospheric%20propagation%20mode

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

A cylindrical parabolic reflector enclosed by two plates perpendicular to the cylinder and spaced to permit propagation of only one mode in the desired direction of polarization.  3, record 6, English, - pillbox%20antenna

Record number: 6, Textual support number: 1 OBS

It is fed on the focal line.  3, record 6, English, - pillbox%20antenna

Record number: 6, Textual support number: 2 OBS

Do not confuse with "cheese antenna" in which the plates are so spaced that more than one mode can be propagated in the desired direction of polarization.  4, record 6, English, - pillbox%20antenna

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Antenne constituée d'un réflecteur hertzien formé d'une portion de cylindre parabolique limitée par deux plaques parallèles relativement rapprochées et perpendiculaires aux génératrices, et d'une source primaire placée sur la ligne focale ou dans son voisinage.  1, record 6, French, - antenne%20en%20D

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

Long distance propagation can however be achieved by tropospheric mode mainly due to scattering from irregularities in the troposphere.  2, record 7, English, - tropospheric%20mode

Record number: 7, Textual support number: 1 OBS

tropospheric mode: term officially approved by the Electronics and Telecommunications Terminology Committee.  3, record 7, English, - tropospheric%20mode

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 OBS

mode troposphérique : terme uniformisé par le Comité d’uniformisation des termes de l’électronique et des télécommunications (CUTEL).  2, record 7, French, - mode%20troposph%C3%A9rique

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

An antenna with a cylindrical parabolic reflector enclosed by two plates perpendicular to the cylinder and so spaced that more than one mode can be propagated in the desired direction of polarization.  3, record 8, English, - cheese%20antenna

Record number: 8, Textual support number: 1 OBS

It is fed on the focal line.  3, record 8, English, - cheese%20antenna

Record number: 8, Textual support number: 2 OBS

Do not confuse with "pillbox antenna" which can permit propagation of only one mode in the desired direction of polarization.  4, record 8, English, - cheese%20antenna

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Antenne constituée d'un réflecteur hertzien formé d'une portion de cylindre parabolique limitée par deux plaques parallèles relativement rapprochées et perpendiculaires aux génératrices, et d'une source primaire placée sur la ligne focale ou dans son voisinage.  2, record 8, French, - antenne%20en%20D

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Since the ionosphere lying over the great circle determines the mode of propagation, a method for determining the MUF over that path suggests itself : we must first determine the critical frequency at the midpoint of the path at a particular layer height. Knowing the path length will enable us to determine what the MUF factor will be.  3, record 9, English, - maximum%20usable%20frequency%20factor

Record 9,  Textual support,  French

Record 9,  Textual support,  Spanish

Record number: 9, Textual support number: 1 DEF

Relación entre la frecuencia máxima utilizable y la frecuencia crítica en el punto medio del salto.  1, record 9, Spanish, - factor%20de%20m%C3%A1xima%20frecuencia%20utilizable

Record number: 9, Textual support number: 1 OBS

símbolo: Md; en una transmisión de simple salto.  1, record 9, Spanish, - factor%20de%20m%C3%A1xima%20frecuencia%20utilizable

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 DEF

a laser with part of its output fed back to its input using more than one propagation mode in the feedback path for controlling mode generation and mode conversion.  3, record 10, English, - distributed%20feedback%20laser

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 OBS

répartie : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).  4, record 10, French, - laser%20%C3%A0%20r%C3%A9troaction%20r%C3%A9partie

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 DEF

A radio signal returned to earth after striking the ionosphere.  3, record 11, English, - sky%20wave

Record number: 11, Textual support number: 1 CONT

The important mode of propagation known as skywave is due to the existence of a region in the upper atmosphere called the ionosphere.  3, record 11, English, - sky%20wave

Record number: 11, Textual support number: 1 OBS

sky wave; ionospheric wave: terms officially approved by the International Civil Aviation Organization (ICAO).  4, record 11, English, - sky%20wave

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

Onde hertzienne, qui entre émetteur et récepteur, a subi une ou plusieurs réflexions contre la couche d'ionosphère.  3, record 11, French, - onde%20d%27espace

Record number: 11, Textual support number: 1 CONT

Quand les ondes réfléchies se mêlent aux ondes réfractées, il se produit des interférences qui rendent l'écoute instable [...] à la tombée du jour, l'onde réfléchie apparaît et augmente considérablement la portée - mais dans une zone annulaire située par exemple entre 100 et 200 km de l'antenne, l'écoute est inconfortable.  3, record 11, French, - onde%20d%27espace

Record number: 11, Textual support number: 1 OBS

onde d'espace; onde ionosphérique : termes uniformisés par l'Organisation de l'aviation civile internationale (OACI).  4, record 11, French, - onde%20d%27espace

Record 11,  Textual support,  Spanish

Record number: 11, Textual support number: 1 DEF

Onda electromagnética que llega a un receptor después de la reflexión ionosférica.  3, record 11, Spanish, - onda%20ionosf%C3%A9rica

Record number: 11, Textual support number: 1 OBS

onda ionosférica; onda espacial : términos aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).  4, record 11, Spanish, - onda%20ionosf%C3%A9rica

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 DEF

For a given mode of propagation, the ratio of the field strength at a specified height to that at the earth's surface.  2, record 12, English, - height%20gain

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 DEF

Rapport des champs à une hauteur donnée et à la surface de la terre pour une propagation donnée.  1, record 12, French, - gain%20par%20sur%C3%A9l%C3%A9vation

Record 12,  Textual support,  Spanish

Record number: 12, Textual support number: 1 DEF

Relación entre la intensidad de campo a una altura determinada y la de la superficie de la tierra, para un modo de propagación determinado.  2, record 12, Spanish, - ganancia%20por%20altura

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 DEF

A digital transmission over optical fibers that allow more than one mode of propagation.  1, record 13, English, - digital%20transmission%20over%20multimode%20optical%20fibers

Record 13,  Textual support,  French

Record 13,  Textual support,  Spanish

Record number: 13, Textual support number: 1 DEF

Transmisión digital por fibras ópticas que permite más de un modo de propagación.  1, record 13, Spanish, - transmisi%C3%B3n%20digital%20por%20fibras%20%C3%B3pticas%20multimodo

Record 14,  Textual support,  English

Record number: 14, Textual support number: 1 OBS

A technique for enhancing one particular mode of wave propagation and suppressing others by combining the outputs of three components recordings.  1, record 14, English, - polarization%20filtering

Record 14,  Textual support,  French

Record number: 14, Textual support number: 1 OBS

Fascicule no 2, NY, 1990.  1, record 14, French, - filtrage%20par%20polarisation

Record number: 14, Textual support number: 2 OBS

Reproduit du lexique «Disarmament and Peace Keeping/Désarmement et Maintien de la Paix» avec l'autorisation de l'Office des Nations Unies à Genève.  2, record 14, French, - filtrage%20par%20polarisation

Record 14,  Textual support,  Spanish

Record 15,  Textual support,  English

Record number: 15, Textual support number: 1 DEF

one of the possible ways in which the air in a room, considered as an elastic body, will vibrate naturally when subjected to an acoustical disturbance. With each normal mode is associated a resonance frequency and, in general, a group of wave propagation directions comprising a closed path.  1, record 15, English, - normal%20mode%20of%20a%20room

Record 15,  Textual support,  French

Record number: 15, Textual support number: 1 DEF

(mode normal de vibration) : dans un local considéré comme un corps élastique, l'une des manières dont l'air ambiant vibre naturellement lorsqu'on le soumet à une perturbation acoustique. A chaque mode de résonance correspond une fréquence de résonance et, généralement, un ensemble de directions de propagation d'ondes formant un parcours fermé.  1, record 15, French, - r%C3%A9sonance%20propre%20d%27un%20local

Record 15,  Textual support,  Spanish

Record 16,  Textual support,  English

Record number: 16, Textual support number: 1 DEF

a waveguide consisting of a long tube of concentric circular dielectric materials, capable of sustaining and guiding an electromagnetic wave in one or more propagation mode. For example most optical fibers are circular dielectric waveguides that are capable of conducting light waves.  1, record 16, English, - circular%20dielectric%20waveguide

Record 16,  Textual support,  French

Record 16,  Textual support,  Spanish