TERMIUM Plus®

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ACROSS-TRACK [7 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2007-05-25

English

Subject field(s)
  • Remote Sensing
  • Optics
CONT

Across-track stereoscopy from two different orbits. The latter solution has been applied more often since 1980 - first with Landsat from two adjacent orbits, then with SPOT using across-track steering capabilities, and finally with IRS-1C/D by "rolling" the satellite.

Key term(s)
  • across track stereoscopy

French

Domaine(s)
  • Télédétection
  • Optique

Spanish

Save record 1

Record 2 2007-03-11

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Spacecraft
  • Remote Sensing
CONT

The primary objectives of AVNIR-2 are disaster monitoring and land cover mapping and with its across-track viewing capabilities (+/-44°), observation of disaster areas within 2 days' repeat is feasible.

OBS

across-track viewing: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

Key term(s)
  • acrosstrack viewing

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Engins spatiaux
  • Télédétection
DEF

Visée oblique dans le plan contenant l'axe optique du capteur et perpendiculaire au vecteur vitesse instantané du véhicule.

CONT

Le dispositif de visée latérale de SPOT permet d'enregistrer une même scène à partir de plusieurs orbites différentes (11 à la latitude de 45° pendant le cycle de 26 jours du satellite) et d'obtenir des images stéréoscopiques. Cette répétitivité est très utile pour observer des phénomènes à évolution rapide, comme l'agriculture (le suivi des récoltes) ou des catastrophes naturelles comme les inondations ou les incendies de forêts.

OBS

visée latérale : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Save record 2

Record 3 2007-03-11

English

Subject field(s)
  • Spacecraft
  • Remote Sensing
DEF

A scanner with an oscillating mirror that moves back and forth across the satellite's direction of travel, creating scan line strips that are contiguous or that overlap slightly.

CONT

One type of scanner is called a whiskbroom scanner also referred to as across-track scanners. It uses rotating mirrors to scan the landscape below from side to side perpendicular to the direction of the sensor platform, like a whiskbroom. The width of the sweep is referred to as the sensor swath. The rotating mirrors redirect the reflected light to a point where a single or just a few sensor detectors are grouped together. Whiskbroom scanners with their moving mirrors tend to be large and complex to build. The moving mirrors create spatial distortions that must be corrected with preprocessing by the data provider before image data is delivered to the user. An advantage of whiskbroom scanners is that they have fewer sensor detectors to keep calibrated as compared to other types of sensors.

OBS

across-track scanner; whiskbroom scanner: terms officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

Key term(s)
  • across track scanner
  • whisk broom scanner
  • whisk-broom scanner

French

Domaine(s)
  • Engins spatiaux
  • Télédétection
DEF

Scanneur ayant un miroir oscillant dont le déplacement perpendiculaire à la trajectoire du satellite engendre des lignes de balayage contiguës ou légèrement chevauchantes.

OBS

dispositif de balayage transversal : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Naves espaciales
  • Teledetección
CONT

El sistema de escáner transversal utiliza un espejo rotativo, éste se encuentra conectado a un motor eléctrico cuyo eje de rotación es paralelo a la dirección de vuelo.

Save record 3

Record 4 2007-01-31

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Spacecraft
  • Remote Sensing
DEF

The direction on the ground perpendicular to the satellite path.

OBS

The look direction is normal to the azimuth direction.

OBS

look direction: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Engins spatiaux
  • Télédétection
DEF

Direction de la droite qui joint le satellite à un élément quelconque de la ligne de balayage en cours d'exploration.

OBS

direction de visée : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

PHR

Direction de visée instantanée.

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Teledetección
Save record 4

Record 5 2007-01-31

English

Subject field(s)
  • Remote Sensing
DEF

Refers to the dimension perpendicular to the path of [a] platform carrying [a] sensor.

CONT

The Across-track Band Mapping Look-up Table GADS defines the relationship between pixel across-track co-ordinate and across-track band number.

OBS

across-track: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
DEF

Qualifie l'axe perpendiculaire à la direction de déplacement de la plate-forme portant le capteur.

CONT

Tangage (déploiement angulaire autour d'un axe transversal).

OBS

transversal : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Teledetección
Save record 5

Record 6 2005-01-24

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Spacecraft
  • Remote Sensing
DEF

Remote sensing systems that build up an image by scanning from side to side in a direction that is at right angles to the sensors direction of movement[;] this scanning from side to side is achieved through electromechanical mechanisms which change the direction of view of the sensor.

CONT

Spatial imaging is achieved using the push-broom principle: the across-track scanning is performed electronically and the along-track scanning is made thanks to the satellite motion.

OBS

Sensors aboard the Landsat satellites were built in a "whisk broom" (across track) configuration. In a whisk broom sensor, a mirror scans across the satellite's path, reflecting light into a single detector which collects data one pixel at a time. The moving parts make this type of sensor expensive and more prone to wearing out.

OBS

across-track scanning: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

Key term(s)
  • cross-track scanning
  • across track scanning

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Engins spatiaux
  • Télédétection
DEF

Scannage effectué par défilement du champ de visée instantané perpendiculairement à la trace de la plate-forme d'observation sur le sol.

OBS

Le «scannage transversal» peut être réalisé par des moyens mécaniques ou électroniques.

Spanish

Save record 6

Record 7 1984-11-06

English

Subject field(s)
  • Aircraft Piloting and Navigation

French

Domaine(s)
  • Pilotage et navigation aérienne
OBS

OACI

Spanish

Save record 7

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