{"id":23727,"date":"2022-02-09T18:04:29","date_gmt":"2022-02-09T17:04:29","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=23727"},"modified":"2022-02-09T18:04:56","modified_gmt":"2022-02-09T17:04:56","slug":"spacex-perd-40-satellites-starlink-a-cause-dun-orage-solaire-magnetique","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/spacex-perd-40-satellites-starlink-a-cause-dun-orage-solaire-magnetique\/","title":{"rendered":"SpaceX perd 40 satellites Starlink \u00e0 cause d&rsquo;un orage solaire magn\u00e9tique"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>SpaceX a \u00e9t\u00e9 victime d\u2019une temp\u00eate g\u00e9omagn\u00e9tique peu apr\u00e8s le d\u00e9collage d\u2019une mission Starlink. Les perturbations ont \u00e9t\u00e9 si fortes que l\u2019entreprise a perdu 40 des 49 satellites lanc\u00e9s d\u00e9but f\u00e9vrier.<\/p>\n<p>Dans un message publi\u00e9 le 8 f\u00e9vrier 2022, l\u2019entreprise am\u00e9ricaine annonce avoir \u00e9t\u00e9 victime d\u2019une temp\u00eate g\u00e9omagn\u00e9tique qui a lourdement affect\u00e9 une r\u00e9cente mise en orbite de satellites Starlink.<\/p>\n<p>Le jeudi 3 f\u00e9vrier \u00e0 13 h 13 HNE, Falcon 9 a lanc\u00e9 49 satellites Starlink en orbite terrestre basse depuis le Launch Complex 39A (LC-39A) au Kennedy Space Center en Floride. Le deuxi\u00e8me \u00e9tage du Falcon 9 a d\u00e9ploy\u00e9 les satellites sur leur orbite pr\u00e9vue, avec un p\u00e9rig\u00e9e d&rsquo;environ 210 kilom\u00e8tres au-dessus de la Terre, et chaque satellite a r\u00e9alis\u00e9 un vol contr\u00f4l\u00e9.<\/p>\n<p>SpaceX d\u00e9ploie ses satellites sur ces orbites inf\u00e9rieures de sorte que dans le cas tr\u00e8s rare o\u00f9 un satellite ne passe pas les v\u00e9rifications initiales du syst\u00e8me, il sera rapidement d\u00e9sorbit\u00e9 par la tra\u00een\u00e9e atmosph\u00e9rique. Bien que la faible altitude de d\u00e9ploiement n\u00e9cessite des satellites plus performants \u00e0 un co\u00fbt consid\u00e9rable pour nous, c&rsquo;est la bonne chose \u00e0 faire pour maintenir un environnement spatial durable.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Malheureusement, les satellites d\u00e9ploy\u00e9s jeudi ont \u00e9t\u00e9 significativement impact\u00e9s par une temp\u00eate g\u00e9omagn\u00e9tique vendredi. Ces temp\u00eates provoquent un r\u00e9chauffement de l&rsquo;atmosph\u00e8re et une augmentation de la densit\u00e9 atmosph\u00e9rique \u00e0 nos basses altitudes de d\u00e9ploiement. En fait, le GPS embarqu\u00e9 sugg\u00e8re que la vitesse d&rsquo;escalade et la gravit\u00e9 de la temp\u00eate ont entra\u00een\u00e9 une augmentation de la tra\u00een\u00e9e atmosph\u00e9rique jusqu&rsquo;\u00e0 50% sup\u00e9rieure \u00e0 celle des lancements pr\u00e9c\u00e9dents. L&rsquo;\u00e9quipe Starlink a command\u00e9 les satellites dans un mode sans \u00e9chec o\u00f9 ils voleraient sur le bord (comme une feuille de papier) pour minimiser la tra\u00een\u00e9e &#8211; pour \u00ab\u00a0se mettre \u00e0 l&rsquo;abri de la temp\u00eate\u00a0\u00bb &#8211; et a continu\u00e9 \u00e0 travailler en \u00e9troite collaboration avec le 18e Space Force de la Force spatiale. Control Squadron et LeoLabs pour fournir des mises \u00e0 jour sur les satellites bas\u00e9es sur des radars au sol.<\/p>\n<p>Une analyse pr\u00e9liminaire montre que la tra\u00een\u00e9e accrue \u00e0 basse altitude a emp\u00each\u00e9 les satellites de quitter le mode sans \u00e9chec pour commencer les man\u0153uvres de mont\u00e9e en orbite, et jusqu&rsquo;\u00e0 40 des satellites rentreront ou sont d\u00e9j\u00e0 rentr\u00e9s dans l&rsquo;atmosph\u00e8re terrestre. Les satellites d\u00e9sorbit\u00e9s ne pr\u00e9sentent aucun risque de collision avec d&rsquo;autres satellites et, par conception, disparaissent lors de la rentr\u00e9e dans l&rsquo;atmosph\u00e8re, ce qui signifie qu&rsquo;aucun d\u00e9bris orbital n&rsquo;est cr\u00e9\u00e9 et qu&rsquo;aucune partie du satellite ne touche le sol. Cette situation unique d\u00e9montre les efforts consid\u00e9rables d\u00e9ploy\u00e9s par l&rsquo;\u00e9quipe Starlink pour s&rsquo;assurer que le syst\u00e8me est \u00e0 la pointe de l&rsquo;att\u00e9nuation des d\u00e9bris en orbite.<\/p>\n<p>Adaptation <a href=\"https:\/\/www.laterredufutur.com\/accueil\/\">Terra Projects<\/a><\/p>\n<p>Sources : <a href=\"https:\/\/www.numerama.com\/sciences\/847959-un-orage-magnetique-fait-perdre-40-satellites-starlink-a-spacex.html\" rel=\"noopener\" target=\"_blank\">https:\/\/www.numerama.com<\/a> \/ <a href=\"https:\/\/www.spacex.com\/updates\/\" rel=\"noopener\" target=\"_blank\">https:\/\/www.spacex.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"23727\">(423)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>SpaceX a \u00e9t\u00e9 victime d\u2019une temp\u00eate g\u00e9omagn\u00e9tique peu apr\u00e8s le d\u00e9collage d\u2019une mission Starlink. Les perturbations ont \u00e9t\u00e9 si fortes&#8230;<\/p>\n","protected":false},"author":1,"featured_media":23728,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"#SpaceX perd 40 satellites Starlink \u00e0 cause d'un orage solaire magn\u00e9tique @laterredufutur.com Terra Projects","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22,24],"tags":[2022,208,37,4444,7844],"class_list":["post-23727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","category-soleil","tag-orage-magnetique","tag-satellite","tag-soleil","tag-space-x","tag-starlink","wpcat-22-id","wpcat-24-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/02\/space-x.jpg?fit=1039%2C669&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-6aH","jetpack-related-posts":[{"id":24989,"url":"https:\/\/www.laterredufutur.com\/accueil\/record-avec-200-tirs-consecutifs-reussis-pour-spacex\/","url_meta":{"origin":23727,"position":0},"title":"Record avec 200 tirs cons\u00e9cutifs r\u00e9ussis pour SpaceX","author":"Admin","date":"2 juin 2023","format":false,"excerpt":"C'est un cap historique : la fus\u00e9e Falcon 9, partiellement r\u00e9utilisable, est d\u00e9sormais de tr\u00e8s loin, la plus fiable au monde. C\u2019est un nouveau record pour SpaceX, parmi les plus importants, alors que la compagnie domine les tirs orbitaux depuis notre Plan\u00e8te. 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Je m\u2019appelle Elon Musk. Je suis le fondateur de SpaceX. Dans cinq ans, vous \u00eates morts. \u00bb Quand Elon Musk prononce ces mots en 2006, \u00e0 Washington, devant les experts mondiaux du spatial, personne ne le prend au s\u00e9rieux. 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