{"id":444,"date":"2015-12-23T18:17:53","date_gmt":"2015-12-23T18:17:53","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/frankel\/?p=444"},"modified":"2015-12-23T18:17:53","modified_gmt":"2015-12-23T18:17:53","slug":"tir-martien-reporte","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/","title":{"rendered":"Tir martien report\u00e9"},"content":{"rendered":"

\"Vue<\/a>
Vue d’artiste de la sonde Insight sur Mars avec son seismom\u00e8tre d\u00e9ploy\u00e9 sous coupole<\/figcaption><\/figure>Coup dur pour le CNES et la conqu\u00eate de Mars en g\u00e9n\u00e9ral : le tir de la sonde am\u00e9ricaine InSight, cens\u00e9e d\u00e9coller en mars prochain pour la plan\u00e8te rouge, vient d\u2019\u00eatre ajourn\u00e9 \u00e0 cause d\u2019un d\u00e9faut d\u2019\u00e9tanch\u00e9it\u00e9 de l\u2019un des deux instruments fran\u00e7ais \u00e0 bord. Du coup il faudra attendre la prochaine fen\u00eatre de tir, en mai 2018.
\nL\u2019instrument incrimin\u00e9 est le seismom\u00e8tre SEIS, avec comme c\u0153ur une sph\u00e8re herm\u00e9tique dans laquelle trois capteurs \u00e9lectroniques ultra sensibles \u00e9taient cens\u00e9s d\u00e9tecter les vibrations de la plan\u00e8te en trois dimensions. Pour qu\u2019il n\u2019y ait aucune perturbation sur les mouvements infimes des capteurs, le vide devait \u00eatre fait dans la sph\u00e8re. Or les tests d\u2019\u00e9tanch\u00e9it\u00e9 ont montr\u00e9 une fuite\u2014vraisemblablement au niveau d\u2019une soudure\u2014et malgr\u00e9 deux tentatives de r\u00e9paration, l\u2019instrument n\u2019est donc pas en \u00e9tat optimal de marche.
\n
\"La<\/a>
La sph\u00e8re du sismom\u00e8tre n’est pas parfaitement \u00e9tanche (CNES)<\/figcaption><\/figure>
\nLa fus\u00e9e Atlas \u00e9tait d\u00e9j\u00e0 sur le pas de tir ; la sonde vient d\u2019\u00eatre renvoy\u00e9e chez son constructeur principal Lockheed Martin \u00e0 Denver dans le Colorado. La mission a un budget modeste plafonn\u00e9 \u00e0 425 millions de dollars : le report de deux ans entra\u00eenera des co\u00fbts suppl\u00e9mentaires, mais l\u2019\u00e9quipe esp\u00e8re bien que cela ne compromettera pas la mission.<\/p>\n","protected":false},"excerpt":{"rendered":"

Coup dur pour le CNES et la conqu\u00eate de Mars en g\u00e9n\u00e9ral : le tir de la sonde am\u00e9ricaine InSight, cens\u00e9e d\u00e9coller en mars prochain pour la plan\u00e8te rouge, vient d\u2019\u00eatre ajourn\u00e9 \u00e0 cause d\u2019un d\u00e9faut d\u2019\u00e9tanch\u00e9it\u00e9 de l\u2019un des deux instruments fran\u00e7ais \u00e0 bord. Du coup il faudra attendre la prochaine fen\u00eatre de tir, … Continuer la lecture de Tir martien report\u00e9<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[13,4],"tags":[],"class_list":["post-444","post","type-post","status-publish","format-standard","hentry","category-actualites","category-sciences"],"yoast_head":"\nTir de la sonde Insight report\u00e9 (blog Frankel)<\/title>\n<meta name=\"description\" content=\"Le tir de la sonde martienne Insight a \u00e9t\u00e9 report\u00e9 \u00e0 mai 2018 par suite d'un probl\u00e8me d'\u00e9tanch\u00e9it\u00e9 du sismom\u00e8tre fran\u00e7ais SISM.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Charles Frankel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/\",\"name\":\"Tir de la sonde Insight report\u00e9 (blog Frankel)\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2015\/12\/Insight-on-Mars.jpg\",\"datePublished\":\"2015-12-23T18:17:53+00:00\",\"dateModified\":\"2015-12-23T18:17:53+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63\"},\"description\":\"Le tir de la sonde martienne Insight a \u00e9t\u00e9 report\u00e9 \u00e0 mai 2018 par suite d'un probl\u00e8me d'\u00e9tanch\u00e9it\u00e9 du sismom\u00e8tre fran\u00e7ais SISM.\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2015\/12\/23\/tir-martien-reporte\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2015\/12\/Insight-on-Mars.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2015\/12\/Insight-on-Mars.jpg\",\"width\":1600,\"height\":900,\"caption\":\"Vue d'artiste de la sonde Insight sur Mars avec son seismom\u00e8tre d\u00e9ploy\u00e9 sous coupole\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/\",\"name\":\"Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue\",\"description\":\"La science ? 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