{"id":205052,"date":"2016-07-15T01:06:36","date_gmt":"2016-07-15T01:06:36","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/les-capteurs-dimagerie-e2v-guident-la-sonde-juno-de-la-nasa-vers-jupiter\/"},"modified":"2016-07-15T01:06:36","modified_gmt":"2016-07-15T01:06:36","slug":"les-capteurs-dimagerie-e2v-guident-la-sonde-juno-de-la-nasa-vers-jupiter","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/les-capteurs-dimagerie-e2v-guident-la-sonde-juno-de-la-nasa-vers-jupiter\/","title":{"rendered":"Les capteurs d&rsquo;imagerie e2v guident la sonde Juno de la NASA vers Jupiter"},"content":{"rendered":"<p>Une fois aux abords de la plan\u00e8te, la sonde a fait entrer son module d&rsquo;exploration robotique en orbite polaire afin d&rsquo;\u00e9tudier l&rsquo;atmosph\u00e8re de Jupiter, sa temp\u00e9rature, ses nuages, ses champs magn\u00e9tiques et gravitationnels, ainsi que sa magn\u00e9tosph\u00e8re.<\/p>\n<p>\u00c9prouv\u00e9s et utilis\u00e9s dans de nombreuses autres missions dans le monde, les capteurs d&rsquo;imagerie TH7890 512 x 512 pixels de 17&nbsp;microns \u00e0 \u00e9clairage en face avant et destin\u00e9s au suivi stellaire, ont \u00e9t\u00e9 fournis par le centre de production e2v de Grenoble. Ils ont \u00e9t\u00e9 utilis\u00e9s afin de d\u00e9terminer l&rsquo;orientation de la sonde en mesurant sa position par rapport aux \u00e9toiles.<\/p>\n<p>Ces dispositifs optiques ont \u00e9t\u00e9 sp\u00e9cifiquement con\u00e7us pour assurer une extr\u00eame pr\u00e9cision de pointage et une grande stabilit\u00e9 pendant des p\u00e9riodes prolong\u00e9es et pour pouvoir r\u00e9sister aux intenses radiations pr\u00e9sentes autour de la plan\u00e8te, la mission Juno \u00e9tant la premi\u00e8re de l&rsquo;Histoire \u00e0 s&rsquo;approcher d&rsquo;aussi pr\u00e8s de la plan\u00e8te g\u00e9ante gazeuse.<\/p>\n<p>Sur la base des donn\u00e9es fournies par le suivi stellaire, qui reconna\u00eet les diff\u00e9rentes constellations pr\u00e9sentes dans leur champ de vision, les ordinateurs du syst\u00e8me AOCS (Attitude and Orbit Control System) ont calcul\u00e9 avec pr\u00e9cision les man\u0153uvres de la sonde. Cette exploitation des donn\u00e9es a \u00e9t\u00e9 un facteur cl\u00e9 de r\u00e9ussite de la mission, la sonde ne disposant que d&rsquo;une seule et unique chance d&rsquo;atteindre sa destination.<\/p>\n<p>\u00ab\u00a0Nous sommes extr\u00eamement fiers du r\u00f4le d\u00e9terminant qu&rsquo;ont jou\u00e9 nos capteurs d&rsquo;imagerie, sp\u00e9cifiquement con\u00e7us pour r\u00e9sister aux environnements \u00e0 fortes radiations \u00e9nerg\u00e9tiques, dans la r\u00e9ussite de l&rsquo;importante mission Juno de la NASA,\u00a0\u00bb a d\u00e9clar\u00e9&nbsp;Jean-Charles Terrien, Vice-pr\u00e9sident de la division Space Imaging d&rsquo;e2v \u00e0 Grenoble. \u00ab\u00a0En levant le voile sur les origines et l&rsquo;\u00e9volution de Jupiter, cette mission apportera aux scientifiques une importante quantit\u00e9 de donn\u00e9es qui leur permettra \u00e0 terme de mieux comprendre la formation de notre syst\u00e8me solaire.\u00a0\u00bb<\/p>\n<p><a href=\"http:\/\/www.e2vtech.fr\/\" target=\"_blank\" rel=\"noopener\">www.e2vtech.fr<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s un p\u00e9riple de plus de 2,7 milliards de kilom\u00e8tres dans l&rsquo;espace qui a d\u00e9but\u00e9 il y a cinq ans, les capteurs d&rsquo;imagerie e2v ont guid\u00e9 avec pr\u00e9cision la sonde Juno de la NASA vers la plan\u00e8te g\u00e9ante gazeuse Jupiter que la mission a atteinte le 4 juillet 2016.<\/p>\n","protected":false},"author":9,"featured_media":205053,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[],"domains":[47],"ppma_author":[1141],"class_list":["post-205052","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Les capteurs d&#039;imagerie e2v guident la sonde Juno de la NASA ve...<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s un 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