{"id":5974,"date":"2023-03-01T20:24:45","date_gmt":"2023-03-01T20:24:45","guid":{"rendered":"https:\/\/www.africa-press.net\/guinee-equatoriale\/politique\/mars-les-secrets-de-la-dynamique-de-la-poussiere-resolus-grace-a-lextraordinaire-ingenuity"},"modified":"2023-03-01T21:21:25","modified_gmt":"2023-03-01T21:21:25","slug":"mars-les-secrets-de-la-dynamique-de-la-poussiere-resolus-grace-a-lextraordinaire-ingenuity","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/guinee-equatoriale\/toutes-les-actualites\/mars-les-secrets-de-la-dynamique-de-la-poussiere-resolus-grace-a-lextraordinaire-ingenuity","title":{"rendered":"Mars : les secrets de la dynamique de la poussi\u00e8re r\u00e9solus gr\u00e2ce \u00e0 l\u2019extraordinaire Ingenuity"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Guinee Equatoriale. <\/strong><\/span>Gra\u0302ce aux donne\u0301es de vol du drone martien du Jet Propulsion Laboratory (JPL), des chercheurs ont pu conclure la premie\u0300re e\u0301tude en conditions re\u0301elles de la poussie\u0300re sur Mars. Les re\u0301sultats serviront de base pour faire voler d\u2019autres drones sur Mars, ou me\u0302me sur Titan.<\/p>\n<p>La poussie\u0300re est omnipre\u0301sente dans l\u2019atmosphe\u0300re te\u0301nue de Mars. Elle a eu raison de Mars Insight, et les rovers lui survivent gra\u0302ce a\u0300 leur alimentation e\u0301lectrique nucle\u0301aire. Pose\u0301 sur le sol martien le 3 avril 2021 par le rover Perseverance, le drone Ingenuity bat tous les records de longe\u0301vite\u0301. Depuis son premier vol, le 19 avril 2021, Ingenuity en a re\u0301alise\u0301 41 a\u0300 l\u2019heure ou\u0300 nous e\u0301crivons ces lignes !<\/p>\n<p><b>La richesse des donne\u0301es extraterrestres<\/b><\/p>\n<p>Les dizaines de vols re\u0301alise\u0301s permettent de constituer une base de donne\u0301es suffisamment riche pour en sortir des e\u0301tudes in situ. C\u2019est ce qu\u2019ont fait des chercheurs du Stevens Institute of Technology, du Space Science Institute et du Jet Propulsion Laboratory. Ils font notamment le paralle\u0300le avec les vols d\u2019he\u0301licopte\u0300re dans le de\u0301sert, qui engendrent des proble\u0300mes de visibilite\u0301 en soulevant la poussie\u0300re lors du de\u0301collage ou de l\u2019atterrissage.<\/p>\n<p>L\u2019e\u0301quipe a analyse\u0301 la luminosite\u0301 enregistre\u0301e dans les images prises par la came\u0301ra de navigation d\u2019Ingenuity lors de six vols. Cette luminosite\u0301 permet d\u2019identifier la quantite\u0301 de poussie\u0300re souleve\u0301e lorsque le drone est proche du sol (de\u0301collage \/ atterrissage \/ vol bas). A\u0300 l\u2019aide de mode\u0300les de simulations, les chercheurs ont pu calculer la taille et la masse totale des nuages de poussie\u0300re forme\u0301es lors de ces man\u0153uvres. L\u2019e\u0301quipe a e\u0301galement pu be\u0301ne\u0301ficier de vide\u0301os prises par la came\u0301ra Mastcam-Z de Perseverance.<\/p>\n<p><b>missions ulte\u0301rieures<\/b><\/p>\n<p>Les performances du drone de 1,8 kg ont donne\u0301 des ailes a\u0300 d\u2019autres projets d\u2019utilisation de ce genre de ve\u0301hicule a\u0300 l\u2019avenir. C\u2019est me\u0302me devenu le plan B du programme Mars Sample Return de la Nasa et de l\u2019ESA : la collecte des e\u0301chantillons de\u0301pose\u0301s au sol par Perseverance et la livraison au Mars Ascent Vehicle par deux drones plus gros qu\u2019Ingenuity. Comme autre projet, il y a la mission Dragonfly sur Titan, avec un drone quadricopte\u0300re de la taille d\u2019une voiture !<\/p>\n<p>L\u2019e\u0301quipe estime aussi que leurs re\u0301sultats serviront e\u0301galement a\u0300 la Nasa pour trouver un moyen de ge\u0301rer la poussie\u0300re qui recouvre peu a\u0300 peu les panneaux solaires de sondes martiennes, comme Mars Insight.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/guinee-equatoriale\">Guinee Equatoriale<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Guinee Equatoriale. Gra\u0302ce aux donne\u0301es de vol du drone martien du Jet Propulsion Laboratory (JPL), des chercheurs ont pu conclure la premie\u0300re e\u0301tude en conditions re\u0301elles de la poussie\u0300re sur Mars. Les re\u0301sultats serviront de base pour faire voler d\u2019autres drones sur Mars, ou me\u0302me sur Titan. La poussie\u0300re est omnipre\u0301sente dans l\u2019atmosphe\u0300re [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":5973,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,49,50],"class_list":["post-5974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-guinee-equatoriale","tag-guinee-equatoriale"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Mars : les secrets de la dynamique de la poussi\u00e8re r\u00e9solus gr\u00e2ce \u00e0 l\u2019extraordinaire Ingenuity - Guin\u00e9e \u00e9quatoriale<\/title>\n<meta name=\"description\" content=\"Gra\u0302ce aux donne\u0301es de vol du drone martien du Jet Propulsion Laboratory 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