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Résumé Cet article analyse dans un premier temps l’évolution de l’état de polarisation d’une onde traversant un milieu quelconque. Un formalisme basé sur la notion de polarisation caractéristique est ensuite proposé puis étendu au cas d’un système radar, c’est- à -dire au cas d’une propagation aller puis retour. Cette étude théorique est alors appliquée à l’étude des milieux troposphérique et ionosphérique...
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