capteur passif

CONT: Les capteurs passifs sont uniquement récepteurs (ex. : radiomètres, caméras, spectroradiomètres, etc.), la source d'énergie est le plus souvent le Soleil ou la Terre.
OBS: capteur passif : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

CONT: A passive sensor is a microwave instrument designed to receive and to measure natural emissions produced by the Earths surface and its atmosphere. The frequency and strength of these natural emissions characterize the type and the status of a large number of important geophysical, atmospheric and surface parameters of the land, sea, and ice caps, that describe the status of the Earth system (i.e., The Earth, its atmosphere, and the oceans) and its mechanisms.
CONT: Microwave energy recorded by a passive sensor can be emitted by the atmosphere, reflected from the surface, emitted from the surface, or transmitted from the subsurface.