File:Radar range versus height above ground.jpg
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Captions
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Range versus height of a radar beam in standard atmosphere
Summary[edit]
| Description |
Français : Graphique montrant la distance au radar versus la hauteur du faisceau radar par rapport au sol envoyé à différent angle d'élévation dans une atmosphère standard. Notez que la hauteur de chaque trajet de faisceau augmente à mesure que le faisceau s'éloigne du radar. Cela est dû à la courbure de la Terre. Des écarts par rapport à ces trajets peuvent se produire en fonction de l'indice de réfraction de l'air, qui détermine si les ondes électromagnétiques se réfractent (c'est-à-dire se plient) lorsqu'elles passent d'un matériau à un autre. Lorsqu'une inversion de température ou un fort gradient d'humidité vertical est présent dans la basse troposphère, l'indice de réfraction peut changer avec la hauteur, courbant essentiellement le trajet du faisceau radar.
English: Graphic showing the distance from the radar versus le height above ground of a radar beam at different elevation angle in standard conditions. Note that the height of each beam path increases as the beam travels farther away from the radar. This is because of the curvature of the earth. Deviations from these paths may occur depending on the refractive index of the air, which dictates whether electromagnetic waves will refract (that is, bend) when they pass from one material to another. When either a temperature inversion or sharp, vertical moisture gradient is present in the lower troposphere, the refractive index can change with height, essentially bending the radar beam path. |
| Date | |
| Source | http://research.atmos.ucla.edu/weather/C110/Documents/tmp/basic_wxradar/navmenu.php_tab_1_page_3_4_1_type_text.htm |
| Author | NOAA |
Licensing[edit]
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This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 14:49, 24 November 2023 | | 580 × 400 (186 KB) | Pierre cb (talk | contribs) | Uploaded a work by NOAA from http://research.atmos.ucla.edu/weather/C110/Documents/tmp/basic_wxradar/navmenu.php_tab_1_page_3_4_1_type_text.htm with UploadWizard |
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