TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The NDVI has been correlated with such physical measurements as total standing biomass green leaf-area index (LAI) and per cent vegetation cover but is probably best described as a relative measure of vegetation vigor and photosynthetic activity.  4, record 1, English, - normalized%20difference%20vegetation%20index

Record number: 1, Textual support number: 2 CONT

Normalized difference vegetation index(NDVI) is the ratio between the difference and sum of two spectral bands. One band is in the visible spectrum(e. g. avhrr_ch1) and one band in the near IR [infrared]... NDVI provides an estimation of the health of vegetation and the means of monitoring changes in vegetation over time. Values close to zero mean little or no vegetation and values close to +1(0. 6-0. 9) indicate high density of green leaves.  5, record 1, English, - normalized%20difference%20vegetation%20index

Record number: 1, Textual support number: 1 OBS

normalized difference vegetation index; NDVI: term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  6, record 1, English, - normalized%20difference%20vegetation%20index

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Indice de végétation par différence normalisée (IVDN) [ou] NDVI (normalized difference vegetation index]) est un indice de végétation. Le NDVI se calcule à partir des réflectances mesurées dans les bandes visible rouge et le proche infrarouge, [...] où NIR est la réflexion dans la bande proche infra-rouge, et R est la réflexion dans la bande rouge visible.  2, record 1, French, - indice%20de%20v%C3%A9g%C3%A9tation%20par%20diff%C3%A9rence%20normalis%C3%A9e

Record number: 1, Textual support number: 1 OBS

indice de végétation par différence normalisée; indice de Tucker; indice d'activité végétale; NDVI : termes et abréviation uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  6, record 1, French, - indice%20de%20v%C3%A9g%C3%A9tation%20par%20diff%C3%A9rence%20normalis%C3%A9e

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Narrow bands of enhanced reflectance that occur in transparent materials in which the refractive index is high or the absorption coefficient is large.  1, record 2, English, - reststrahlen

Record number: 2, Textual support number: 1 OBS

reststrahlen band : In the IR [infrared] region, refers to absorption of energy as a function of silica content.  2, record 2, English, - reststrahlen

Record number: 2, Textual support number: 2 OBS

reststrahlen: Etymology: German, "residual rays."  1, record 2, English, - reststrahlen

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Rayonnement qui présente l'aspect d'un rayonnement réfléchi et qui provient, dans le cas de matériaux réfringents, d'un effet lié à la fois à un fort indice de réfraction et à un coefficient d'absorption élevé.  4, record 2, French, - rayonnement%20r%C3%A9tror%C3%A9fring%C3%A9

Record number: 2, Textual support number: 1 OBS

Ce type de rayonnement permet d'obtenir par télédétection des informations sur la composition chimique des matériaux de la surface terrestre.  4, record 2, French, - rayonnement%20r%C3%A9tror%C3%A9fring%C3%A9

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Advanced Geostationary InfraRed Sounder(AGIRS)(planned project) to improve the sounding capabilities of the Spinning Enhanced Visible and InfraRed Imager(SEVIRI). Such an instrument, consisting of a high-resolution spectrometer measuring the atmospheric spectrum in the spectral band from 4. 33 to 5. 49 microns, will be accommodated in the present MSG design.  1, record 3, English, - advanced%20geostationary%20infrared%20sounder

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 OBS

Projet à l'étude répondant à une demande d'EUMETSAT visant à améliorer les capacités de MSG après MSG 3.  1, record 3, French, - sondeur%20g%C3%A9ostationnaire%20de%20pointe%20dans%20l%27infrarouge

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A 16-channel nonscanning radiometer flown on Nimbus-5 (Launched December 1972) for sounding the atmosphere in the infrared spectrum.  2, record 4, English, - selective%20chopper%20radiometer

Record number: 4, Textual support number: 1 OBS

The new instrument has 16 channels, eight of which observe emission from the 16 mµ m band of carbon dioxide for remote temperature sounding, two observe emission from water-vapour and ice clouds in the far infrared, one observes emission from low atmospheric water-vapour, three are in spectral regions where the atmosphere is substantially transparent, i. e. window regions, and two observe reflected sunlight from high clouds near to 2. 7 mµ m in the near infrared. The horizontal resolution of the instrument is about 25 km and a complete set of measurements is made every 4 s.  3, record 4, English, - selective%20chopper%20radiometer

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Étude et réalisation d'un radiomètre à modulation sélective type 4 cuves pour la détection passive à distance de l'anhydride sulfureux [...]  1, record 4, French, - radiom%C3%A8tre%20%C3%A0%20modulation%20s%C3%A9lective

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

Method for investigating atmospheric behaviour using pulsed light beams (lasers).  7, record 5, English, - light%20detection%20and%20ranging

Record number: 5, Textual support number: 1 CONT

Light detection and ranging(lidar) is a technique in which a beam of light is used to make range-resolved remote measurements. A lidar [instrument] emits a beam of light, that interacts with the medium or object under study. Some of this light is scattered back toward the lidar. The backscattered light captured by the lidar's receiver is used to determine some property or properties of the medium in which the beam propagated or the object that caused the scattering. The lidar technique operates on the same principle as radar; in fact, it is sometimes called laser radar. The principal difference between lidar and radar is the wavelength of the radiation used. Radar uses wavelengths in the radio band whereas lidar uses light, that is usually generated by lasers in modern lidar systems. The wavelength or wavelengths of the light used by a lidar depend on the type of measurements being made and may be anywhere from the infrared through the visible and into the ultraviolet. The different wavelengths used by radar and lidar lead to the very different forms that the actual instruments take. The major scientific use of lidar is for measuring properties of the earth's atmosphere, and the major commercial use of lidar is in aerial surveying and bathymetry(water depth measurement). Lidar is also used extensively in ocean research and has several military applications, including chemical and biological agent detection. Lidar can also be used to locate, identify, and measure the speed of vehicles. Hunters and golfers use lidar-equipped binoculars for range finding.  6, record 5, English, - light%20detection%20and%20ranging

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Méthode d'étude du comportement de l'atmosphère à l'aide de faisceaux lumineux pulsés (lasers).  4, record 5, French, - d%C3%A9tection%20et%20t%C3%A9l%C3%A9m%C3%A9trie%20par%20ondes%20lumineuses

Record number: 5, Textual support number: 1 OBS

La détection se fait par des cellules optiques suivies de photomultiplicateurs.  5, record 5, French, - d%C3%A9tection%20et%20t%C3%A9l%C3%A9m%C3%A9trie%20par%20ondes%20lumineuses

Record 5,  Textual support,  Spanish

Record number: 5, Textual support number: 1 DEF

Método para investigar las características atmosféricas usando pulsaciones de haces de luz (láser).  1, record 5, Spanish, - lidar

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

The band of electromagnetic wavelengths lying between the extreme of the visible (approximately 0.70 micrometer) and the shortest microwaves (approximately 100 micrometers).  2, record 6, English, - infrared%20band

Record number: 6, Textual support number: 1 OBS

Satellite derived remote sensed images are representations of the variation in intensity of electromagnetic energy reflected from the Earth’s surface. The specific image produced is determined by the wavelength of the electromagnetic energy that is being sensed, and the physical properties of the matter that reflects the energy. Aerial photographs use only the visible portion of the electromagnetic spectrum (5 x 107 metres = .5 microns), whereas Landsat TM and SPOT images record the Earth’s reflectivity at seven different wavelengths in the visible and infrared range, and radar images record the reflectivity of wavelengths in the non-visible range of 1 to 10 cm (microwaves).  3, record 6, English, - infrared%20band

Record number: 6, Textual support number: 2 OBS

infrared band : term officially approved by the RADARSAT-2 Terminology Approval Group(RTAG).  4, record 6, English, - infrared%20band

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Bande de spectre électromagnétique qui s'étend du visible le plus éloigné (infrarouge proche) aux hyperfréquences les plus proches (infrarouge lointain).  2, record 6, French, - bande%20infrarouge

Record number: 6, Textual support number: 1 CONT

Une composition en couleurs vraies ne pourra jamais rendre que l'information enregistrée pour les bandes bleues, vertes et rouges. Cependant, la plupart des satellites sont équipés de capteurs qui sont également sensible à des types de lumière invisibles pour l'homme (comme par exemple la lumière infrarouge ou ultraviolette). [En] bande infrarouge [..] tout comme pour les autres types de lumière, le capteur mesure la lumière infrarouge de chaque pixel. Pour chaque pixel, un nombre donné correspond à la lumière infrarouge. Plus le nombre est élevé, plus la proportion de lumière infrarouge mesurée est importante. Ainsi, les nombres mesurés pour l'eau par le satellite seront radicalement différents des nombres se rapportant aux forêts. De même, les prairies réfléchissent des quantités de lumière infrarouge différentes de celles réfléchies par les forêts, même si leur couleur (le vert) est identique. Lorsque nous transposerons ces nombres en images via l'ordinateur, la couleur des prairies sera différente de celle des forêts. Parfois, la différence est telle que les valeurs IR mesurées sur des arbres feuillus malades diffèrent de celles mesurées sur les arbres sains.  3, record 6, French, - bande%20infrarouge

Record number: 6, Textual support number: 1 OBS

bande infrarouge : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 6, French, - bande%20infrarouge

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

Linear exploration by using an electromagnetic beam.  3, record 7, English, - linear%20scanning

Record number: 7, Textual support number: 1 CONT

[The] Multi-Spectral Scanner... is a line scanning device which records from four bands, two in the visible and two in the near infrared spectral bands. The system is comprised of a telescope, a mirror which reflects ground radiation onto a bank of 24 electro-optical sensors, band filters and a sampling system, an internal calibration system and various devices which ensure an orderly stream of digital data for each pixel and spectral band. It images six scan lines in each of the four spectral bands simultaneously giving a 24 scan-line total.  3, record 7, English, - linear%20scanning

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Exploration linéaire [au moyen] d'un faisceau électromagnétique.  4, record 7, French, - balayage%20en%20ligne

Record number: 7, Textual support number: 1 CONT

Le balayage est [dit] linéaire lorsque toutes les directions d'observation au cours d'un balayage sont situées dans un même plan, généralement perpendiculaire à la ligne de vol [...] Dans le cas du balayage linéaire, la dimension de l'élément de résolution varie entre la verticale du capteur, à proximité de la ligne nadir, définie comme la ligne située à la verticale de la plate-forme, et la bordure du champ balayé.  5, record 7, French, - balayage%20en%20ligne

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

A device that measures the microwave radiation emitted or reflected by an object.  3, record 8, English, - microwave%20radiometer

Record number: 8, Textual support number: 1 CONT

Radar is an active microwave sensor ... the passive counterpart [is] the microwave radiometer. This device responds to the extremely low levels of microwave energy that are naturally emitted and/or reflected from terrain features.  4, record 8, English, - microwave%20radiometer

Record number: 8, Textual support number: 1 OBS

radiometer : An instrument for quantitatively measuring the intensity of EMR [electromagnetic radiation] in some band of wavelengths in any part of the EM spectrum. Usually used with a modifier, such as [infrared] IR radiometer or microwave radiometer.  5, record 8, English, - microwave%20radiometer

Record number: 8, Textual support number: 2 OBS

microwave radiometer; MWR: term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, record 8, English, - microwave%20radiometer

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Instrument de mesure du rayonnement hyperfréquence souvent gradué en températures de brillance.  5, record 8, French, - radiom%C3%A8tre%20hyperfr%C3%A9quences

Record number: 8, Textual support number: 1 CONT

Les radiomètres à hyperfréquences peuvent être utilisés au sol ou à partir d'une plate-forme aéroportée ou spatiale. Les composantes d'un radiomètre à hyperfréquences sont : l'antenne, le système récepteur formé par un amplificateur, le détecteur et le filtre passe-bas (aussi appelé intégrateur par quelques auteurs) et le système d'affichage ou d'enregistrement des données. À cela, il faut ajouter un générateur d'ondes quand le radiomètre est utilisé en mode actif comme diffusomètre.  5, record 8, French, - radiom%C3%A8tre%20hyperfr%C3%A9quences

Record number: 8, Textual support number: 1 OBS

radiomètre hyperfréquences : terme uniformisé par le Comité d'uniformisation de la terminologie spatiale (CUTS)  5, record 8, French, - radiom%C3%A8tre%20hyperfr%C3%A9quences

Record number: 8, Textual support number: 2 OBS

radiomètre à hyperfréquences; MWR : terme et abréviation uniformisés par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  6, record 8, French, - radiom%C3%A8tre%20hyperfr%C3%A9quences

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

First-generation flirs operated at 8 to 12 microns in the far infrared band, and used a mercury cadmium telluride(HgCdTe) detector with 60 to 180 elements, and a detector size of 40 micrometres.  1, record 9, English, - far%20infrared%20band

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

Les flirs de première génération fonctionnaient dans l'infrarouge lointain ,8-12 microns, et leur détecteur au tellurure de mercure-cadmium, HgCdTe, comportait de 60 à 180 éléments pour une taille de 40 micromètres.  1, record 9, French, - infrarouge%20lointain

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 OBS

Comparing the near infrared and red band of the OSMI, it would be known that global scale land vegetation indices. These indices are very useful for studying the change of land ecosystem in global scale, finally these could be helpful for the researches on the global change.  3, record 10, English, - land%20vegetation%20index

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 DEF

A filter which allows only a specific band width of the electromagnetic spectrum to pass, i. e., 4 to 8 micron infrared radiation.  2, record 11, English, - spectral%20filter

Record number: 11, Textual support number: 1 OBS

This is done by using an electronic device that, through transmission, changes the electromagnetic radiation spectral composition.  3, record 11, English, - spectral%20filter

Record number: 11, Textual support number: 2 OBS

spectral filter: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  4, record 11, English, - spectral%20filter

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 DEF

Dispositif optique ou électronique qui modifie, par transmission, la composition spectrale d'un rayonnement électromagnétique [...].  2, record 11, French, - filtre%20spectral

Record number: 11, Textual support number: 1 CONT

[Le] filtre spectral [...] définit les domaines du spectre [ou bandes spectrales] dans lesquelles on enregistre l'énergie reçue.  3, record 11, French, - filtre%20spectral

Record number: 11, Textual support number: 1 OBS

filtre spectral : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  4, record 11, French, - filtre%20spectral

Record 11,  Textual support,  Spanish

Record 12,  Textual support,  English

Record number: 12, Textual support number: 1 DEF

Region of the electromagnetic spectrum in which CO₂ plays a significant role in the transfer of infrared radiation through the atmosphere. A band centred at 14. 7 µm causes intense absorption; bands at 2. 7 and 4. 3 µm are less important.  1, record 12, English, - carbon%20dioxide%20band

Record 12,  Textual support,  French

Record number: 12, Textual support number: 1 DEF

Région du spectre électromagnétique où le CO₂ joue un rôle significatif dans la transmission du rayonnement infrarouge à travers l'atmosphère. Une bande centrée sur 14,7 µm provoque une absorption intense; des bandes à 2,7 et 4,3 µm sont moins importantes.  1, record 12, French, - bande%20du%20dioxyde%20de%20carbone

Record 12,  Textual support,  Spanish

Record number: 12, Textual support number: 1 DEF

Región del espectro electromagnético en la que el CO₂ tiene una función significativa en la transferencia de la radiación infrarroja a través de la atmósfera. Una banda, centrada en 14,7 µm, produce una absorción intensa. La bandas situadas en 2,7 y 4,3 µm son menos importantes.  1, record 12, Spanish, - banda%20del%20di%C3%B3xido%20carb%C3%B3nico

Record 13,  Textual support,  English

Record number: 13, Textual support number: 1 CONT

The laser(or lidar) velocimeter [lidar=light radar] operates in a fashion entirely analogous to that of the airborne Doppler weather radars likely soon to be available for detecting turbulence in storm cells. As with radars, the device detects air movements by observing the motion of particles suspended in the air and carried with it. The only significant difference is that a beam of coherent infrared radiation is used to scan ahead of the aircraft, instead of a beam(or series of pulses) of radio energy in the considerably longer-wavelength microwave band. The frequency of the back-scattered echoes or reflections undergoes Doppler shift detection by standard heterodyning techniques, which involve comparing the frequency of the reflected illumination with that of the original laser beam. Any reflecting object or material which has motion relative to the transmitter/receiver will cause a detectable shift in frequency, which can be isolated from the transmitter's own proper motion(over the ground) and thus yield a precise indication of the speed at which the air is moving several hundred metres in front of the aircraft. From this data, it is easy to compute what the air speed of the aircraft will be when it reaches that particular patch of air in a few seconds’ time [and hence detect possible turbulence ahead].  2, record 13, English, - laser%20velocimeter

Record 13,  Textual support,  French

Record number: 13, Textual support number: 1 CONT

Le principe de fonctionnement du vélocimètre à laser (ou lidar) est exactement le même que celui des radars météorologiques Doppler de bord, qui doivent être mis en service prochainement pour la détection des turbulences dans les systèmes d'orages.  1, record 13, French, - v%C3%A9locim%C3%A8tre%20%C3%A0%20laser

Record 13,  Textual support,  Spanish

Record 14,  Textual support,  English

Record number: 14, Textual support number: 1 CONT

A wide variety of infrared detectors is now available. The most important consideration with respect to IR systems is the wavelength Q band at which the sensor operates.  1, record 14, English, - IR%20system

Record 14,  Textual support,  French

Record 14,  Textual support,  Spanish