{"id":403,"date":"2017-10-30T11:06:00","date_gmt":"2017-10-30T10:06:00","guid":{"rendered":"https:\/\/kids.esa.int\/satellites_see_through_hurricanes\/"},"modified":"2026-10-08T00:27:46","modified_gmt":"2026-10-07T22:27:46","slug":"satellites_see_through_hurricanes","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/satellites_see_through_hurricanes\/","title":{"rendered":"Les satellites voient \u00e0 travers les ouragans !"},"content":{"rendered":"<div class=\"lede\">\n<p>Cette ann\u00e9e, plus de 10 ouragans se sont d\u00e9j\u00e0 abattus sur l\u2019oc\u00e9an Atlantique. C\u2019est la premi\u00e8re fois en plus de cent ans qu\u2019un si grand nombre d\u2019ouragans frappe cette zone de notre plan\u00e8te. Comprendre la formation de ces puissantes temp\u00eates et anticiper leurs mouvements sont deux actions indispensables pour sauver des vies. Un couple de satellites Sentinelle de l\u2019ESA nous assiste dans cette mission.<\/p>\n<\/div>\n<p>Utiliser les satellites en orbite autour de la Terre pour photographier les ouragans peut s'av\u00e9rer tr\u00e8s utile, mais les satellites Sentinelle poss\u00e8dent un atout qui les rend indispensables. Ils sont \u00e9quip\u00e9s d\u2019instruments radar de haute technologie leur permettant de mesurer l\u2019\u00e9paisseur des glaces de mer, de suivre la progression des mar\u00e9es noires ou de contr\u00f4ler avec pr\u00e9cision les cons\u00e9quences d\u2019un s\u00e9isme. Des chercheurs du Centre allemand pour l\u2019a\u00e9ronautique et l\u2019a\u00e9rospatiale ont mis au point une nouvelle technique d\u2019imagerie radar qui aide les satellites Sentinelle \u00e0 voir \u00e0 travers les ouragans et \u00e0 photographier les \u00e9tendues d\u2019eau qu\u2019ils recouvrent !<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"Contains modified Copernicus Sentinel data (2017), processed by ESA, CC BY-SA 3.0 IGO\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/10\/Hurricanes_are_very_dangerous_especially_if_they_reach_land\" data-licence=\"CC BY-SA 3.0 IGO or ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/10\/hurricanes_are_very_dangerous_especially_if_they_reach_land\/17867785-3-eng-GB\/Hurricanes_are_very_dangerous_especially_if_they_reach_land.jpg\" alt=\"Hurricanes are very dangerous, especially if they reach land\"><figcaption>Les ouragans sont tr\u00e8s dangereux, surtout s'ils touchent terre<\/figcaption><\/figure>\n<p>Les satellites n\u2019ont pas \u00e9t\u00e9 initialement con\u00e7us pour observer les ouragans , c\u2019est pourquoi il est tr\u00e8s impressionnant que des scientifiques aient invent\u00e9 une nouvelle fa\u00e7on d\u2019utiliser cette technologie, qui va nous permettre d\u2019en savoir plus sur les vents de surface et sur la hauteur des vagues sous les ouragans. Il serait bien trop dangereux d\u2019envoyer des bateaux braver les ouragans pour collecter de telles informations : l\u2019utilisation de satellites est beaucoup plus s\u00fbre.<\/p>\n<p>Les donn\u00e9es captur\u00e9es par les satellites Sentinelle permettent \u00e0 la communaut\u00e9 scientifique d\u2019\u00e9valuer le potentiel de destruction d\u2019un ouragan, mais aussi de d\u00e9terminer s\u2019il va frapper des zones habit\u00e9es. Ces informations peuvent \u00e9galement \u00eatre communiqu\u00e9es aux bateaux qui naviguent sur l\u2019oc\u00e9an Atlantique, pour qu'ils se tiennent \u00e0 l\u2019\u00e9cart des ouragans les plus dangereux.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1532\" data-credit=\"Contains modified Copernicus Sentinel data (2017), processed by DLR\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/10\/Radar_was_used_to_create_this_map_showing_how_high_the_waves_caused_by_hurricane_Irma_were\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/10\/radar_was_used_to_create_this_map_showing_how_high_the_waves_caused_by_hurricane_irma_were\/18250916-2-eng-GB\/Radar_was_used_to_create_this_map_showing_how_high_the_waves_caused_by_hurricane_Irma_were.jpg\" alt=\"Radar was used to create this map showing how high the waves caused by hurricane Irma were\"><figcaption>Cette carte, qui montre la hauteur des vagues provoqu\u00e9es par l'ouragan Irma, a \u00e9t\u00e9 r\u00e9alis\u00e9e \u00e0 l'aide d'un radar.<\/figcaption><\/figure>\n<p>Voir \u00e0 travers les ouragans peut s\u2019apparenter \u00e0 de la science-fiction, mais les satellites Sentinelle ont d\u00e9j\u00e0 utilis\u00e9 cette technique \u00e0 plusieurs reprises. En septembre dernier, l\u2019ouragan Irma a touch\u00e9 les c\u00f4tes de Cuba et de la Floride en entra\u00eenant la cr\u00e9ation de vagues pouvant atteindre une dizaine de m\u00e8tres. Les satellites Sentinelle, qui se trouvaient au-dessus, ont collect\u00e9 de pr\u00e9cieuses informations.<\/p>\n<p>Les satellites Sentinelle, qui nous aident \u00e0 veiller sur notre plan\u00e8te et \u00e0 en prot\u00e9ger les habitants, sont des outils d\u2019une grande utilit\u00e9.<\/p>\n<p><b>Fait int\u00e9ressant :<\/b> Les deux satellites utilis\u00e9s pour observer l'int\u00e9rieur des ouragans s'appellent Sentinel-1A et 1B. Ils font partie d'une famille enti\u00e8re de satellites Sentinel qui gravitent autour de la Terre et l'observent.<\/p>","protected":false},"excerpt":{"rendered":"<p>So far this year 10 hurricanes have raged across the Atlantic \u2013 the first time that there have been so many in a row in over 100 years. Understanding how [&hellip;]<\/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\/2017\/10\/the_sentinel-1_satellites_have_radar_vision\/17891613-2-eng-GB\/The_Sentinel-1_satellites_have_radar_vision.jpg","esa_banner_description":"The Sentinel-1 satellites have radar vision","esa_banner_credit":"ESA\/ATG medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/10\/The_Sentinel-1_satellites_have_radar_vision","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-403","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\/403","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=403"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/403\/revisions"}],"predecessor-version":[{"id":4446,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/403\/revisions\/4446"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=403"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=403"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=403"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=403"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=403"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=403"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=403"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}