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IMAGE SWATH [13 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-04-28

English

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

Standard Beam. The standard beam mode operates with any one of seven beam positions, referred to as S1 to S7. The nominal incidence angle range covered by the full set of standard beam is from 20 degrees(at the inner edge of S1) to 49 degrees(at the outer edge of S7). The spatial resolution is 27 m in azimuth and 26 m(near) to 20 m(far) in range direction. Each individual beam covers a minimum ground swath of 100 km within the total 500 km accessibility swath of the full set of Standard beams. The nominal spatial resolution in the range direction is 26 m for S1 at near range to 20 m for S7 at far range. The azimuth resolution is the same, 27 m, for all beam positions. Standard beam modes allow imaging over a wide range of incidence angles with optimum system image quality.

OBS

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

PHR

Single-polarization standard beam.

French

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

[Faisceau qui permet] l'acquisition d'images [grâce à] des angles d'incidence variés et des modes différents; ces modes sont au nombre de sept (S1 à S7).

CONT

[Le] faisceau standard 7 de RADARSAT, [...] assure une couverture nominale de 100 km par 100 km avec une résolution de 25 mètres.

OBS

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

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
Save record 1

Record 2 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 2

Record 3 2007-02-01

English

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

Instead of scanning between different elevation sub-swaths, the Alternating Polarisation Mode(co-polar) scans between two polarisations, HH and VV, within a single swath(which is preselected, as for the Image Mode). In addition, there are two cross-polar modes, where the transmit pulses are all H or all V polarisation, with the receive chain operating alternatively in H and V, as in the CO-polar mode.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
CONT

Nous élargirons cette série temporelle de mesures en incluant ENVISAT en mode de polarisation alternée.

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
Save record 3

Record 4 2007-01-31

English

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

[An application that] performs a radiometric balancing on synthetic aperture radar data to compensate for non-uniform illumination in the range direction due to the antenna pattern.

CONT

Antenna pattern correction. The brightness of the image is affected by the antenna gain variation where the near range will receive maximum power while the far range will receive minimum power. This effect produces an image that varies in intensity(tone) along the range direction across the image. The antenna pattern effect is expressed as the energy returned to the radar and decreases dramatically as the range distance increases. Antenna pattern correction is applied to produce a uniform average brightness across the imaged swath.

French

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

Application qui exécute un équilibrage radiométrique des données d'un radar à synthèse d'ouverture pour compenser l'éclairement non uniforme dans la direction de portée causé par le diagramme d'antenne.

CONT

Application des corrections radiométriques suivantes, si nécessaire: correction du diagramme d'antenne; correction de la chute de gain en distance radiale [...]

Spanish

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

Record 5 2007-01-31

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Spacecraft
  • Scientific Measurements and Analyses
DEF

[The] portion of the image swath closest to the nadir track.

CONT

The RADARSAT Standard beam modes have nominal image coverage of 100 km x 100 km, 25 m resolution, and incidence angles that range from 20° to 49°. For the S5 mode, the range resolution varies between 23.6 m in near range to 20.7 m in far range, with 27 m nominal azimuth resolution (4 looks).

OBS

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

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Engins spatiaux
  • Mesures et analyse (Sciences)
DEF

Pour un radar à visée latérale, distance-temps au sol qui correspond à la direction de visée dont l'angle, avec la verticale du capteur actif, est minimal.

CONT

La partie du couloir balayée la plus proche du nadir est appelée portée proximale alors que la partie éloignée du nadir est appelée portée distale [...] L'angle de visée est l'angle à partir duquel le radar illumine la surface. Dans la portée proximale, la géométrie de visée peut être considérée comme étant plus abrupte par rapport à la portée distale où la géométrie de visée est plus rasante.

OBS

portée proximale : terme uniformisé par le Comité d'uniformisation de la terminologie spatiale (CUTS) et par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Medición y análisis (Ciencias)
Save record 5

Record 6 2007-01-31

English

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

A detailed study of the properties of electromagnetic radiation or of a target subject to this radiation.

OBS

ScanSAR processing uses the Spectral Analysis(SPECAN) algorithm to produce full resolution images for RADARSAT ScanSAR data. PrecisionScan uses a range of image analysis functions to assess the quality of images produced, including : Point Target Analysis [;] Distributed Target Analysis [;] ScanSAR Analysis [;] Azimuth Ambiguity Ratio Analysis [;] Swath Characterization [;] Elevation Pattern Determination. These tools are based on the RADARSAT Calibration Workstation Array developed for the Canadian Space Agency.

OBS

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

French

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

Étude détaillée [...] des propriétés d'un rayonnement électromagnétique ou d'une cible soumise à ce rayonnement.

CONT

L'application d'une analyse de texture combinée avec une analyse spectrale pour la classification des images SPOT se traduit généralement par une augmentation significative de l'exactitude de la classification, en particulier dans les milieux à texture variée, comme le milieu péri-urbain ou littoral (Marceau, 1989; Coulombe, 1990).

OBS

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

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Teledetección
Save record 6

Record 7 2007-01-31

English

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

Image direction as measured along the sequence of line-of-sight rays from the radar to each and every reflecting point in the illuminated scene.

CONT

Since a SAR looks down and to the side, the slant range to ground range transformation has an inherent geometric scale which changes across the image swath.

OBS

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

PHR

Slant-range scale distortion.

Key term(s)
  • slant range

French

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

Distance parcourue par l'onde électromagnétique entre le capteur actif et la cible, obtenue par la mesure du temps de parcours.

CONT

Pour tous les angles, l'antenne du radar mesure la distance radiale entre le radar et chaque cible sur la surface : c'est la distance oblique (ou distance-temps).

OBS

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

Key term(s)
  • distance temps

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Teledetección
Save record 7

Record 8 2007-01-31

English

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

The angle defined by the incident radar beam and the vertical (normal) to the intercepting surface.

CONT

The incidence angle is commonly used to describe the angular relationship between the radar beam and the ground, surface layer or a target. A change of the radar illumination angle often affects the radar backscattering behaviour of a surface or target. The incidence angle changes across the radar image swath; it increases from near range to far range. In the case of satellite radar imagery, the change of incidence angle for flat terrain across the imaging swath tends to be rather small, usually on the order of several degrees. In the case of an inclined surface(slope), the local incidence angle is defined as the angle between the incident radar beam and a line that is normal to that surface. The local incidence angle determining, in part, the brightness, or image tone, for each picture element(pixel) and slope facet, is a key element in the prominent rendition of terrain features in radar imagery.

OBS

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

French

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

Angle, en un point du sol, entre la verticale et la direction du satellite.

OBS

L'angle d'incidence détermine l'apparence de la cible sur une image. À chaque pixel d'une image correspond un angle d'incidence local qui varie en fonction des cibles au sol : arbres, rochers, édifices etc., d'où des variations de l'intensité du pixel.

OBS

angle d'incidence : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

PHR

Angle d'incidence élevée, favorable, variable.

PHR

Signal HH à faible angle d'incidence.

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Teledetección
CONT

El ángulo de incidencia describe la relación entre la iluminación del radar y la superficie de tierra. Específicamente, es el ángulo entre el rayo del radar y un objeto en la superficie. El ángulo de incidencia ayuda a determinar el aspecto de un objeto en la imagen.

Save record 8

Record 9 2007-01-31

English

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

All possible image swaths within a pre-defined range of beam positions within a beam mode.

OBS

Left-and right-looking modes will be available on RADARSAT-2. The ability of RADARSAT-2 to image on either side of the spacecraft will essentially reduce the revisit time by one half and the accessibility swath will be doubled.

OBS

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

French

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

En imagerie satellitaire, pour un mode donné, fauchées correspondant à une gamme pré-définie de faisceaux.

OBS

RADARSAT-2 a la capacité de pivoter, ce qui permet d'acquérir des images à gauche ou à droite du satellite. Cette capacité du satellite d'imager d'un côté ou de l'autre aura pour effet de réduire de motié la fréquence de passage et de doubler la fauchée explorable.

OBS

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

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
Save record 9

Record 10 2006-08-28

English

Subject field(s)
  • Remote Sensing
CONT

In order to view the... swath image for an acquisition, click on the acquisition record in the results table, or click on the swath on the display map.

OBS

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

PHR

Quicklook, wide-swath image.

French

Domaine(s)
  • Télédétection
CONT

Pour voir une image de fauchée [...], cliquez sur le dossier d'acquisition dans la table des résultats ou sur la fauchée dans la carte.

OBS

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

PHR

Image de fauchée minute.

Spanish

Save record 10

Record 11 2006-02-10

English

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

The Multi-look fine beam modes image in the same swath locations as the fine beam modes with approximately the same spatial resolution. However, with multiple looks, the multi-look fine beam mode product has improved radiometric resolution. The high data rate capacity of the recorders means that the multi-look data can be obtained without a reduction in swath width. As with the fine beam modes, beams image in the incidence angle range of 30 to 50 degrees. Multi-look fine beam mode images are generated in a single polarization.

OBS

multi-look fine beam mode: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

Key term(s)
  • multilook fine beam mode
  • multi look fine beam mode

French

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

Parmi les améliorations obtenues en mode de visée à résolution fine, mentionnons la résolution radiométrique et le maintien de la largeur de fauchée liées aux capacités de traitement accrues des enregistreurs de données. L'angle d'incidence des faisceaux imageurs se situe entre 30 et 50 degrés. Les images ainsi générées, le sont en polarisation simple.

OBS

mode multivisée à résolution fine : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Save record 11

Record 12 1993-08-26

English

Subject field(s)
  • Spacecraft
  • Remote Sensing

French

Domaine(s)
  • Engins spatiaux
  • Télédétection
OBS

image sur fauchée large : terme uniformisé par le Comité d'uniformisation de la terminologie spatiale (CUTS).

Spanish

Save record 12

Record 13 1985-06-17

English

Subject field(s)
  • Range Measurements (Telecommunications)

French

Domaine(s)
  • Mesures à distance (Télécommunications)

Spanish

Save record 13

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