TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The localizer signal emitted from the transmitter site at the far end of the runway is confined within an angular width between 3° and 6°. The localizer provides course guidance throughout the descent path to the runway threshold from a distance of 18 NM [nautical miles] from the antenna between a height of 1000 ft above the highest terrain along the approach path and 4500 ft above the elevation of the antenna site.  3, record 1, English, - localizer%20signal

Record number: 1, Textual support number: 2 CONT

In a similar manner as the LOC signal, the GS [glide slope] sends a UHF [ultra high frequency] carrier signal with the same two 90-Hz and 150-Hz sideband frequencies that aircraft instruments determine as above or below the desired glide path. This is approximately 3 degrees to the horizon which gives the aircraft a descent rate of approximately 500 feet per minute.  4, record 1, English, - localizer%20signal

Record number: 1, Textual support number: 1 OBS

LOC: localizer.  5, record 1, English, - localizer%20signal

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

LOC : radiophare d'alignement de piste.  3, record 1, French, - signal%20du%20radiophare%20d%27alignement

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 OBS

Various parts of the antenna’s radiation pattern are referred to as lobes, which may be subclassified into major and minor lobes.  2, record 2, English, - antenna%20lobe

Record number: 2, Textual support number: 2 OBS

The major lobe is the lobe of greatest gain and is also referred to as the main lobe or main beam. The minor lobes are further subclassified into side and back lobes ... The numbering of the side lobes are from the main lobe to the back lobe.  2, record 2, English, - antenna%20lobe

Record number: 2, Textual support number: 3 OBS

The spatial resolution is determined by the width of the antenna lobe.  3, record 2, English, - antenna%20lobe

Record number: 2, Textual support number: 4 OBS

antenna lobe: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  4, record 2, English, - antenna%20lobe

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Partie du diagramme de rayonnement d'une antenne, limitée par des directions où le rayonnement est relativement très faible.  2, record 2, French, - lobe%20d%27antenne

Record number: 2, Textual support number: 1 OBS

lobe d'antenne : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  3, record 2, French, - lobe%20d%27antenne

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Parte del diagrama de radiación de una antena que está contenida dentro de una región limitada por direcciones de radiación mínima.  1, record 2, Spanish, - l%C3%B3bulo

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

For an antenna beam in any one dimension, the full width in angle between the directions at which the received or transmitted power falls to half of its maximum value.  2, record 3, English, - half%2Dpower%20beamwidth

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The antenna produce a beam of one degree and two degrees in width respectively. Side lobe attenuation within 10 degrees of the main lobe is-23 dB or less, and outside 10 degrees of the main lobe it is-30dB for both radars.  1, record 4, English, - within%20%2E%2E%2E%20degrees%20of

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

[...] atténuation du lobe secondaire dans les ± 10 degrés autour du lobe principal : -25 dB; [...]  1, record 4, French, - dans%20les%20%C2%B1%20%2E%2E%2E%20degr%C3%A9s%20autour%20de

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

The antenna produces a beam of one degree and two degrees in width respectively. Side lobe attenuation within 10 degrees of the main lobe is-23 dB or less, and outside 10 degrees of the main lobe it is-30dB for both radars.  1, record 5, English, - outside%20%2E%2E%2E%20degrees%20of

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

[...] atténuation du lobe secondaire au-delà de ± 10 degrés autour du lobe principal: -32 dB.  1, record 5, French, - au%2Ddel%C3%A0%20de%20%C2%B1%20%2E%2E%2E%20degr%C3%A9s%20autour%20de

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

[An antenna] equipped with distributed transmit/receive modules which provide distinct transmit and receive beams.  4, record 6, English, - active%2Dphased%20array%20antenna

Record number: 6, Textual support number: 1 CONT

The most significant difference between RADARSAT-2 and RADARSAT-1 payload technology is that RADARSAT-2 uses a fully-active phased array antenna, rather than the passive slotted waveguide antenna used by RADARSAT-1. Fully-active phased arrays offer a number of very significant benefits over passive antenna, but they also add great complexity.... The phased array is made up of 512 individual radiating elements, organized into 16 columns(picture below shows a single column) along the 15-metre antenna length, each with 32 rows across the 1. 5-metre width. The phase shifters and amplitude control are built into the Transmit/Receive(T/R) modules, which feed the radiating elements. Each column has a computer that controls the 32 T/R module settings and these 16 computers are all linked to another computer(in the spacecraft bus) that orchestrates the overall antenna behaviour.  5, record 6, English, - active%2Dphased%20array%20antenna

Record number: 6, Textual support number: 1 OBS

active array antenna: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  6, record 6, English, - active%2Dphased%20array%20antenna

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Antenne composée de plusieurs éléments rayonnants, installée à bord d'un satellite et destinée à la transmission et à la réception des données.  4, record 6, French, - antenne%2Dr%C3%A9seau%20active

Record number: 6, Textual support number: 1 CONT

Le radar à synthèse d'ouverture [de RADARSAT-2] comprend un système électronique sophistiqué qui alimente une antenne active à réseau d'éléments en phase qui consiste en 512 modules de transmission-réception (TRM) avec des réseaux de distribution de puissance et fréquences radio.  3, record 6, French, - antenne%2Dr%C3%A9seau%20active

Record number: 6, Textual support number: 1 OBS

antenne-réseau active : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  5, record 6, French, - antenne%2Dr%C3%A9seau%20active

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

A radar pulse is transmitted from the antenna to the ground. The radar pulse is scattered by the ground targets back to the antenna.  2, record 7, English, - radar%20pulse

Record number: 7, Textual support number: 1 OBS

In synthetic aperture radar(SAR) imaging, microwave pulses are transmitted by an antenna towards the Earth surface. The microwave energy scattered back to the spacecraft is measured. The SAR makes use of the radar principle to form an image by utilising the time delay of the backscattered signals. In real aperture radar imaging, the groud resolution is limited by the size of the microwave beam sent out from the antenna. Finer details on the ground can be resolved by using a narrower beam. The beam width is inversely proportional to the size of the antenna, i. e. the longer the antenna, the narrower the beam.  2, record 7, English, - radar%20pulse

Record number: 7, Textual support number: 2 OBS

radar pulse: term officially approved by the RADARSAT-2 Official Approval Group (ROAG).  3, record 7, English, - radar%20pulse

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

La génération d'une image SAR nécessite la combinaison de deux mécanismes de balayage. Tout d'abord un balayage latéral. Chaque impulsion se propopage à une vitesse égale à celle de la lumière (c = 3.108 m.s-1) selon la direction de visée du satellite (across track), l'écho reçu au niveau de l'antenne est ensuite échantillonné à la fréquence fe (18.96 Mhz pour ERS-1). Simultanément, la scène est balayée dans le sens de déplacement du satellite (along track) à la fréquence d'émission des impulsions notée fp ou PRD (Pulse Rate Frequency) : (entre 1640 et 1720 Hz, par pas de 2 Hz dans le cas d'ERS-1). Les échelles de grandeur des divers mécanismes mis en jeux étant différentes, nous pouvons les supposer indépendants entre eux. Le signal reçu peut être ainsi organisé dans une matrice bi-dimensionnelle, où les paramètres de temps et de distance sont représentés respectivement en ligne par le cadencement des impulsions (PRF) et en colonne par la position des échos sur la ligne, une ligne étant acquise à chaque émission d'une impulsion radar (ou pulse). Une colonne de l'image représentera l'ensemble des réponses des réflecteurs placés à une distance donnée de l'antenne (distance radiale). Sa position sur la ligne est linéairement liée au temps mis par l'onde radar à lui revenir après s'être réfléchie sur le point cible, le radar étant considéré immobile durant ce temps.  2, record 7, French, - impulsion%20radar

Record number: 7, Textual support number: 1 OBS

impulsion radar : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  3, record 7, French, - impulsion%20radar

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

The angular measure of the transverse section of a beam, usually the main beam, lying within directions corresponding to specified values of field strength relative to the maximum.  5, record 8, English, - beamwidth

Record number: 8, Textual support number: 1 CONT

Beamwidth is a measure of the width of the radiation pattern of an antenna. For SAR [Synthetic Aperture Radar] applications, both the vertical beamwidth, affecting the width of the illuminated swath, and the horizontal or azimuth pattern, which determines, indirectly, the azimuth resolution, are frequently used. Beamwidth may be measured in the one-way or two-way form and in either voltage or power.  6, record 8, English, - beamwidth

Record number: 8, Textual support number: 1 OBS

beamwidth: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  7, record 8, English, - beamwidth

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Angle de deux directions, prises à l'intérieur du faisceau d'une antenne dans un plan spécifié passant par l'axe principal de l'antenne, dans lesquelles la valeur de la composante spécifiée de la force cymomotrice est une fraction spécifiée de la valeur maximale dans ce plan. [Définition normalisée par l'AFNOR.]  5, record 8, French, - largeur%20de%20faisceau

Record number: 8, Textual support number: 1 OBS

On considère généralement la largeur angulaire à demi-puissance ou celle qui correspond aux directions des premiers minimums.  5, record 8, French, - largeur%20de%20faisceau

Record number: 8, Textual support number: 2 OBS

largeur angulaire; ouverture angulaire : termes normalisés par l'AFNOR.  6, record 8, French, - largeur%20de%20faisceau

Record number: 8, Textual support number: 3 OBS

largeur de faisceau : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  7, record 8, French, - largeur%20de%20faisceau

Record 8,  Textual support,  Spanish

Record number: 8, Textual support number: 1 DEF

Ángulo comprendido entre dos puntos del lóbulo principal de radiación de una antena, a partir de los cuales la potencia radiada cae por debajo de los 3 dB de su valor máximo.  3, record 8, Spanish, - ancho%20del%20haz

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Compared to real aperture radar, Synthetic Aperture Radar(SAR) synthetically increases the antenna's size or aperture to increase the azimuth resolution though the same pulse compression technique as adopted for range direction. Synthetic aperture processing is a complicated data processing of received signals and phases from moving targets with a small antenna, the effect of which is to should be theoretically convert to the effect of a large antenna, that is a synthetic aperture length... The synthetic aperture length is the beam width by range which a real aperture radar of the same length, can project in the azimuth direction.  2, record 9, English, - aperture%20length

Record number: 9, Textual support number: 1 OBS

aperture length: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, record 9, English, - aperture%20length

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

Longueur d'ouverture 15 mètres.  1, record 9, French, - longueur%20d%27ouverture

Record number: 9, Textual support number: 1 OBS

ouverture : Au voisinage d'une antenne, portion d'une surface plane, perpendiculaire à la direction du maximum de l'intensité du rayonnement, au travers de laquelle passe la quasi totalité de l'énergie rayonnée.  2, record 9, French, - longueur%20d%27ouverture

Record number: 9, Textual support number: 2 OBS

longueur d'ouverture : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  3, record 9, French, - longueur%20d%27ouverture

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 DEF

Antenna whose beam width depends on the size of a horn, reflector or lens.  2, record 10, English, - aperture%20antenna

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 DEF

Antenne dont les caractéristiques de rayonnement découlent de la théorie des ouvertures rayonnantes. L'élément rayonnant principal de ce type d'antenne peut être un cornet, une lentille ou un réflecteur [...]  2, record 10, French, - antenne%20%C3%A0%20ouverture

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 OBS

a--is defined which depends on the angular width of the source, the antenna radiation diagram, and the permissible increase in noise temperature of the earth-station receiving antenna.  2, record 11, English, - interference%20zone

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 OBS

la -- [...] dépend de l'ouverture d'angle de la source, du diagramme de rayonnement de l'antenne et de l'augmentation de température de bruit admissible pour l'antenne de réception de la station terrienne. [trad]  2, record 11, French, - zone%20de%20brouillage

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  French

Record 12,  Textual support,  Spanish