TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

A remote-sensing term referring to the process of assigning different colours to different spectral bands.  2, fiche 1, Anglais, - colour%20composition

Record number: 1, Textual support number: 1 CONT

The image processing consisted in generating intensity images and one coherence image. To facilitate their analysis and interpretation, a coloured composition has been created with the results. This composition is obtained by adding the coherence image in red, the average of both images phase intensities in green and the difference between these phase intensities in blue. As such, a high coherence level(value close to 1) appears in red and indicates a very good phase correlation between the two images, a consequence of the various mechanisms of radar signal scattering and of the lack of change which could affect the target. On the contrary, a weak coherence level(value tending to 0) appears in black and indicates a movement in these zones during the 24 hours interval which separated the two image shots. Lastly, the white spots correspond to areas with a strong radar signal backscattering i. e. with zones of hills or vegetation.  3, fiche 1, Anglais, - colour%20composition

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Dans les systèmes de télédétection, nous avons vu qu'il est possible de détecter et d'enregistrer des parties du spectre électromagnétique qui ne sont pas décelables à l'oeil nu, comme l'infrarouge par exemple. Pour pouvoir visualiser cette information, on associe aux bandes spectrales du système d'observation des couleurs d'affichage (rouge-vert-bleu), qui ne leur correspondent pas nécessairement. Ce faisant, on crée des compositions colorées [...]  2, fiche 1, Français, - composition%20color%C3%A9e

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 CONT

Microwave sensors are particularly effective for measuring land surface hydrological parameters. Since microwave sensors enable us to observe ground surfaces both day and night, we can observe hydrologic phenomena that show remarkable diurnal variation. Further, an inherent feature of a microwave sensor lies in its wavelength between 1 mm and 1 m(0. 3 to 300 GHz of frequency), making it possible to conduct observations without influence from weather and to detect the scattering information not only at the surface, but also in the volume. Furthermore, we can directly observe liquid water having larger relative permittivity than other physical parameters because the scattering of microwaves heavily depends on relative permittivity. There are two types of microwave sensors : a passive microwave sensor that observe weak microwave signals naturally radiated from the Earth's surface, and an active microwave sensor that measures the backscattering coefficient of the transmitted beam.  2, fiche 2, Anglais, - microwave%20sensor

Record number: 2, Textual support number: 1 OBS

microwave sensor: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  3, fiche 2, Anglais, - microwave%20sensor

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 CONT

Tous les objets reflètent, absorbent ou émettent un rayonnement électromagnétique qui correspond à leur composition et à leur structure. Un capteur hyperspectral, fonctionnant à l'aide du rayonnement solaire réfléchi, détecte les spectres particuliers, autrement dit la «signature spectrale» d'un objet, ce qui permet ensuite d'en déterminer la composition.  4, fiche 2, Français, - capteur%20hyperspectral

Record number: 2, Textual support number: 1 OBS

capteur hyperspectral : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  5, fiche 2, Français, - capteur%20hyperspectral

Fiche 2,  Justifications,  Espagnol