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DEPOLARISATION [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-10-11

English

Subject field(s)
  • Electrolytical Processes (Metallurgy)
Key term(s)
  • air depolarization

French

Domaine(s)
  • Électrolyse (Métallurgie)

Spanish

Save record 1

Record 2 2007-01-31

English

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

Depolarization occurs when the polarization state changes between the transmitted and received signal. For example, changing a HH to a HV response. There are four mechanisms known to cause depolarization: a quasi-specular reflection as a result of the difference between the Fresnel reflection coefficients for a two-dimensional, smoothly undulating surface [;] a multi-scattering due to target surface roughness [;] a multiple scattering due to volume scattering [;] anisotropic properties of the targets.

OBS

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

French

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

L'onde polarisée circulairement a le désavantage, lorsque le faisceau radar pénètre la précipitation, de changer son état de polarisation de circulaire à elliptique. Ce changement d'état de polarisation, ou dépolarisation, est attribué aux effets de propagation dus à l'atténuation différentielle et au déphasage différentiel. Les mesures de radar se trouvent contaminées par ces effets et, par conséquent, rendent hasardeuse leur interprétation en termes des caractéristiques de polarisation propres à la précipitation ciblée.

OBS

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

PHR

Dépolarisation de l'onde.

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Teledetección
Save record 2

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