File:Radar-polarisation.svg
| Uploaded by | Pierre cb |
|---|---|
| Upload date | 2011-12-10T02:01:12Z |
| MIME type | image/svg+xml |
| Dimensions | 713 × 383 px |
| File size | 30.6 KB |
Summary
| Description |
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 |
| Other versions |
Derivative works of this file: This file was derived from: Radar-polarization.png |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.