{"id":552,"date":"2014-02-12T09:43:00","date_gmt":"2014-02-12T08:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/galileo_satellites_get_the_green_light\/"},"modified":"2026-10-08T00:29:33","modified_gmt":"2026-10-07T22:29:33","slug":"galileo_satellites_get_the_green_light","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/galileo_satellites_get_the_green_light\/","title":{"rendered":"Feu vert pour les satellites Galileo"},"content":{"rendered":"
\n

L'Europe attend avec confiance la mise en service du premier syst\u00e8me mondial de navigation par satellite \u00e0 usage non militaire, maintenant que les quatre premiers satellites Galileo ont pass\u00e9 leurs tests haut la main.<\/p>\n<\/div>\n

Les quatre premiers satellites de la constellation Galileo ont \u00e9t\u00e9 lanc\u00e9s en 2011 et 2012 afin de prouver l\u2019efficacit\u00e9 de ce syst\u00e8me complexe de positionnement. Ce quatuor comprend le nombre minimal de satellites permettant de garantir une localisation pr\u00e9cise de coordonn\u00e9es g\u00e9ographiques terrestres. Depuis leur lancement, les quatre satellites ont subi de nombreux tests afin de prouver le bon fonctionnement du syst\u00e8me Galileo.<\/p>\n

Le 12 mars 2013, une date historique, les satellites Galileo ont r\u00e9ussi \u00e0 d\u00e9terminer leur premi\u00e8re position au sol. Au cours des mois suivants, de nombreux autres messages de navigation ont \u00e9t\u00e9 \u00e9mis pendant la phase de capacit\u00e9 op\u00e9rationnelle compl\u00e8te du syst\u00e8me Galileo.<\/p>\n

Cette p\u00e9riode de travail intensif a prouv\u00e9 que Galileo fonctionnait \u00e0 merveille. Avec seulement quatre satellites, la constellation europ\u00e9enne Galileo a \u00e9t\u00e9 capable de localiser des positions terrestres avec une pr\u00e9cision horizontale de 8 m\u00e8tres et une pr\u00e9cision verticale de 9 m\u00e8tres. Sa pr\u00e9cision moyenne de 10 milliardi\u00e8mes de seconde lui permet notamment de localiser rapidement des signaux de d\u00e9tresse dans un rayon de 2 kilom\u00e8tres. Ces performances seront encore meilleures quand l\u2019ensemble du syst\u00e8me Galileo aura \u00e9t\u00e9 mis en service.<\/p>\n

L\u2019Europe se pr\u00e9pare maintenant \u00e0 lancer les satellites restants et \u00e0 d\u00e9ployer de nouvelles stations au sol. En 2014, six nouveaux satellites devraient rejoindre les quatre premiers d\u00e9j\u00e0 en orbite pour que les services op\u00e9rationnels de Galileo puissent commencer d\u2019ici la fin d\u2019ann\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"

Europe is confidently looking forward to having the world’s first non-military satellite navigation system, now that the first four Galileo satellites passed their tests with flying colours. The Galileo quartet […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2014\/02\/four-satellite_galileo_constellation2\/17875148-2-eng-GB\/Four-satellite_Galileo_constellation.jpg","esa_banner_description":"Four-satellite Galileo constellation","esa_banner_credit":"ESA - P. Carril","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/02\/Four-satellite_Galileo_constellation2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-552","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/552","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/comments?post=552"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/552\/revisions"}],"predecessor-version":[{"id":1695,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/552\/revisions\/1695"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=552"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=552"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=552"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=552"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=552"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=552"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=552"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}