File:Radar-hauteur-fr.svg

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DescriptionRadar-hauteur-fr.svg	Français : Hauteur du faisceau radar au-dessus du sol. En plus de la distance, on peut calculer la hauteur au-dessus du sol où se trouvent les cibles. Cela se calcule en connaissant l’angle d’élévation du radar et la courbure de la Terre. Il faut également tenir compte de la variation de la densité des couches de l’atmosphère. En effet, le faisceau radar ne se propage pas en ligne droite comme dans le vide mais suit une trajectoire courbe à cause du changement de l’indice de réfraction avec l'altitude. La formule pour trouver cette hauteur est (R. J. Doviak et D. S. Zrnic (1993). ATMS 410 – Radar Meteorology : Beam propagation. Retrieved on 7 décembre 2011.) : $H=\left({\sqrt {r^{2}+(k_{e}a_{e})^{2}+2rk_{e}a_{e}sin(\theta _{e})}}\right)-k_{e}a_{e}+h_{a}$ Où r = distance, k_e = 4/3, a_e = rayon de la Terre, θ_e : angle d’élévation, h_a : hauteur du cornet au-dessus de la surface de la Terre.
Source	travail personnel (own work), File:P satellite dish.svg for the satellite dish.
Author	VIGNERON et Pierre cb
Other versions	Derivative works of this file: Radar-hauteur-es.svg Image:Radar-hauteur-en.svg

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	This licensing tag was added to this file as part of the GFDL licensing update.CC BY-SA 3.0truetrue

File history

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	Date/Time	Dimensions	User	Comment
current	04:34, 21 December 2011	563 × 313 (41 KB)	Pierre cb (talk \| contribs)	Version améliorée
	16:55, 17 February 2009	563 × 313 (39 KB)	VIGNERON (talk \| contribs)
	13:50, 17 February 2009	563 × 313 (37 KB)	Pierre cb (talk \| contribs)	Élimination de la boîte noire où du texte devait se retrouver
	05:05, 17 February 2009	563 × 313 (37 KB)	Pierre cb (talk \| contribs)	Dernière tentative de correction de la boîte noire
	04:48, 17 February 2009	563 × 313 (37 KB)	Pierre cb (talk \| contribs)	Nouvelle tentave de correction de la boîte noire
	04:43, 17 February 2009	563 × 313 (37 KB)	Pierre cb (talk \| contribs)	Reverted to version as of 17:52, 16 February 2009
	04:41, 17 February 2009	850 × 444 (2 KB)	Pierre cb (talk \| contribs)	Correction d'une boîte noire par le texte qui devrait s'y trouver
	17:52, 16 February 2009	563 × 313 (37 KB)	Pierre cb (talk \| contribs)	Ajout de la ligne tangentielle `la courbure de la Terre représentant l'horizon au site radar
	17:12, 11 July 2008	563 × 313 (36 KB)	VIGNERON (talk \| contribs)
	16:44, 7 June 2008	563 × 313 (22 KB)	VIGNERON (talk \| contribs)	Hauteur du faisceau radar (AGL). Calcul de la hauteur des échos reçus par un radar météorologique ainsi que le principe d'opération. Category:Radar