File:Radar-polarisation.svg
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Size of this PNG preview of this SVG file: 713 × 383 pixels. Other resolutions: 320 × 172 pixels | 640 × 344 pixels | 1,024 × 550 pixels | 1,280 × 688 pixels | 2,560 × 1,375 pixels.
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Français : Principle de la double polarisation utilisée en radar. Une gouttelette prend une forme oblate quand elle augmente de masse et les ondes polarisées horizontalement et verticalement donneront des échos d'intensités différentes en revenant au radar. D'autre part, la grêle est plus ou moins circulaire et donc les retours seront égaux. D'autres objets ont des axes préférés. En comparant les retours verticaux et horizontaux avec d'autres données radars, il est possible d'estimer directement le type de cibles vues par le radar.
English: Principle of polarization use for radar. As water dropplets are usually oblate (flattened) as they become larger, the horizontally polarized wave will have a stronger return than the vetical one. Hail on the other hand has no preferred axis.
Comparing the V and H returns will thus give information on the shape of the weather echos and on its type when combined with other data like reflectivity. |
| Date | |
| Source | Own work |
| Author | Flerhun |
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Derivative works of this file: This file was derived from: Radar-polarization.png |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:01, 10 December 2011 | | 713 × 383 (31 KB) | Pierre cb (talk | contribs) | Déplacement du texte pour qu'il entre dans l'image finale |
| 13:47, 11 November 2006 |  | 713 × 383 (29 KB) | Flerhun (talk | contribs) | Traduction et mise au format svg de http://upload.wikimedia.org/wikipedia/fr/9/94/Radar-polarisation.png |
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