{"id":4441,"date":"2013-11-22T17:04:33","date_gmt":"2013-11-22T15:04:33","guid":{"rendered":"https:\/\/spacetux.org\/cpamoa\/?p=4441"},"modified":"2014-03-08T14:27:06","modified_gmt":"2014-03-08T13:27:06","slug":"swarm-nouvelle-mission-detude-du-champ-magnetique-terrestre","status":"publish","type":"post","link":"https:\/\/spacetux.org\/cpamoa\/2013\/11\/swarm-nouvelle-mission-detude-du-champ-magnetique-terrestre\/","title":{"rendered":"Swarm, nouvelle mission d&rsquo;\u00e9tude du champ magn\u00e9tique terrestre"},"content":{"rendered":"<p>Swarm, cela veut dire essaim en anglais, mais c&rsquo;est \u00e9galement le nom de la toute nouvelle mission d&rsquo;observation de la Terre de l&rsquo;Agence Spatiale Europ\u00e9enne. La mission Swarm ce sont trois satellites identiques, nomm\u00e9s A, B et C ou encore Alpha, Bravo et Charly, qui ont \u00e9t\u00e9 lanc\u00e9s aujourd&rsquo;hui \u00e0 12:02GMT par une fus\u00e9e russe Rokot du cosmodrome de <a href=\"https:\/\/maps.google.fr\/maps?q=plessetsk&amp;hl=en&amp;ll=62.915233,40.429688&amp;spn=125.942382,143.964844&amp;sll=48.154911,11.541836&amp;sspn=0.647255,0.562363&amp;t=m&amp;hnear=Plesetsk+Cosmodrome&amp;z=3&amp;iwloc=A\">Plessetsk<\/a>, au nord de la Russie.<\/p>\n<div id=\"attachment_4442\" style=\"width: 572px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/spacetux.org\/cpamoa\/wp-content\/uploads\/2013\/11\/Swarm_constellation-1.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4442\" class=\"size-full wp-image-4442  \" title=\"Swarm_constellation\" alt=\"\" src=\"https:\/\/spacetux.org\/cpamoa\/wp-content\/uploads\/2013\/11\/Swarm_constellation-1.jpg\" width=\"562\" height=\"517\" \/><\/a><p id=\"caption-attachment-4442\" class=\"wp-caption-text\">Vue d&rsquo;artiste de la constellation de satellites de la mission Swarm (Cr\u00e9dits : ESA\/ATG Medialab)<\/p><\/div>\n<p>Ces satellites sont mis sur trois orbites diff\u00e9rentes et vont permettre de mesurer l&rsquo;intensit\u00e9, les variations et l&rsquo;orientation du champ magn\u00e9tique terrestre. Les donn\u00e9es r\u00e9colt\u00e9es vont servir \u00e0 g\u00e9n\u00e9rer un mod\u00e8le informatique qui permettra de pr\u00e9voir l&rsquo;\u00e9volution de ce bouclier naturel.<\/p>\n<p>Voici en dessin (et en anglais) une explication de ce qu&rsquo;est le champ magn\u00e9tique<\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/P7nhgX0ppek\" height=\"315\" width=\"560\" allowfullscreen=\"\" frameborder=\"0\"><\/iframe><\/p>\n<p>Les satellites embarquent des instruments auxquels ont contribu\u00e9 notamment le CNES et le laboratoire du CEA-LETI (Laboratoire d&rsquo;Electronique et de Technologie de l&rsquo;Information) de Grenoble (concernant les magn\u00e9tom\u00e8tres scalaires absolus) et le Canada (concernant l&rsquo;EFI, l&rsquo;Electric Field Instrument).<\/p>\n<p>Voici une courte vid\u00e9o du CNES expliquant la mission en fran\u00e7ais<\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/wMtu-GY5G2k\" height=\"315\" width=\"560\" allowfullscreen=\"\" frameborder=\"0\"><\/iframe><\/p>\n<p>et une autre d&rsquo;Euronews en collaboration avec l&rsquo;ESA<\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/SQZINbXpjc4\" height=\"315\" width=\"420\" allowfullscreen=\"\" frameborder=\"0\"><\/iframe><\/p>\n<p>D&rsquo;apr\u00e8s Jonathan Amos, journaliste de la BBC, les trois satellites ressembleraient \u00e0 des rats de l&rsquo;espace<\/p>\n<blockquote class=\"twitter-tweet\" lang=\"fr\"><p>Heading for Darmstadt and <a href=\"https:\/\/twitter.com\/esaoperations\">@esaoperations<\/a> to cover the <a href=\"https:\/\/twitter.com\/search?q=%23SwarmMission&amp;src=hash\">#SwarmMission<\/a> launch &#8211; These satellites look like <a href=\"https:\/\/twitter.com\/search?q=%23spacerats&amp;src=hash\">#spacerats<\/a> <a href=\"http:\/\/t.co\/GOhY7PWz4D\">http:\/\/t.co\/GOhY7PWz4D<\/a><\/p>\n<p>\u2014 Jonathan Amos (@BBCAmos) <a href=\"https:\/\/twitter.com\/BBCAmos\/statuses\/403648451533369344\">21 Novembre 2013<\/a><\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>Voyez vous-m\u00eame<\/p>\n<div id=\"attachment_4443\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/spacetux.org\/cpamoa\/wp-content\/uploads\/2013\/11\/Artist_s_view_of_Swarm.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4443\" class=\"size-full wp-image-4443      \" title=\"Vue d'artiste de Swarm\" alt=\"\" src=\"https:\/\/spacetux.org\/cpamoa\/wp-content\/uploads\/2013\/11\/Artist_s_view_of_Swarm.jpg\" width=\"590\" height=\"442\" \/><\/a><p id=\"caption-attachment-4443\" class=\"wp-caption-text\">Vue d&rsquo;artiste de Swarm (Cr\u00e9dits : ESA\/P.Carril, 2013)<\/p><\/div>\n<p>Pour ma part je leur trouve une petite ressemblance avec <a href=\"http:\/\/cdn-premiere.ladmedia.fr\/var\/premiere\/storage\/images\/cinema\/photos\/reportages\/photos-l-age-de-glace-comment-scrat-est-devenu-indispensable-a-la-saga-2919678\/scrat-le-veritable-heros-de-l-age-de-glace\/48971860-1-fre-FR\/Scrat-le-veritable-heros-de-L-age-de-Glace_portrait_w858.jpg\">Scrat<\/a>, l&rsquo;\u00e9cureuil de l&rsquo;Age de Glace \ud83d\ude42<br \/>\n<strong>Pour en savoir plus&#8230;<\/strong><\/p>\n<p><a href=\"http:\/\/www.esa.int\/fre\/ESA_in_your_country\/France\/Swarm_sur_le_pas_de_tir\">Un article<\/a> sur le site de l&rsquo;ESA en fran\u00e7ais<br \/>\n<a href=\"http:\/\/www.cnes.fr\/automne_modules_files\/pNews\/public\/r7988_f11_dossier-info.pdf\">Un dossier d&rsquo;information<\/a> concernant la Mission sur le site du CNES<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Swarm, cela veut dire essaim en anglais, mais c&rsquo;est \u00e9galement le nom de la toute nouvelle mission d&rsquo;observation de la Terre de l&rsquo;Agence Spatiale Europ\u00e9enne. La mission Swarm ce sont trois satellites identiques, nomm\u00e9s A, B et C ou encore Alpha, Bravo et Charly, qui ont \u00e9t\u00e9 lanc\u00e9s aujourd&rsquo;hui \u00e0 12:02GMT par une fus\u00e9e russe Rokot du cosmodrome de Plessetsk, au nord de la Russie. Ces satellites sont mis sur trois orbites diff\u00e9rentes et vont permettre de mesurer l&rsquo;intensit\u00e9, les<\/p>\n","protected":false},"author":3,"featured_media":4442,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[586],"tags":[348,497,531,580],"class_list":["post-4441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-terre","tag-esa","tag-plessetsk","tag-rokot","tag-swarm"],"jetpack_featured_media_url":"https:\/\/spacetux.org\/cpamoa\/wp-content\/uploads\/2013\/11\/Swarm_constellation-1.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4aZXT-19D","_links":{"self":[{"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/posts\/4441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/comments?post=4441"}],"version-history":[{"count":3,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/posts\/4441\/revisions"}],"predecessor-version":[{"id":6858,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/posts\/4441\/revisions\/6858"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/media\/4442"}],"wp:attachment":[{"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/media?parent=4441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/categories?post=4441"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spacetux.org\/cpamoa\/wp-json\/wp\/v2\/tags?post=4441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}