{"id":38428,"date":"2020-12-29T13:14:46","date_gmt":"2020-12-29T13:14:46","guid":{"rendered":"https:\/\/\/un-logiciel-permet-un-service-gps-avec-les-satellites-leo\/"},"modified":"2020-12-29T13:14:46","modified_gmt":"2020-12-29T13:14:46","slug":"un-logiciel-permet-un-service-gps-avec-les-satellites-leo","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/un-logiciel-permet-un-service-gps-avec-les-satellites-leo\/","title":{"rendered":"Un logiciel permet un service GPS avec les satellites LEO"},"content":{"rendered":"<p><!-- Global site tag (gtag.js) - Google Analytics --><\/p>\n<p>\u00a0 window.dataLayer = window.dataLayer || [];<\/p>\n<p>\u00a0 function gtag(){dataLayer.push(arguments);}<\/p>\n<p>\u00a0 gtag(&lsquo;js&rsquo;, new Date());\u00a0 gtag(&lsquo;config&rsquo;, &lsquo;UA-160857065-1&rsquo;);<\/p>\n<p><span class=\"VIiyi\" lang=\"fr\"><span class=\"JLqJ4b\" data-language-for-alternatives=\"fr\" data-language-to-translate-into=\"auto\" data-phrase-index=\"0\"><span>L&rsquo;un des grands \u00e9v\u00e9nements dans les telecom en 2020 a \u00e9t\u00e9 l&rsquo;effondrement puis le sauvetage par le gouvernement britannique de OneWeb et sa constellation de satellites en orbite terrestre basse (LEO).<\/span><\/span><\/span><\/p>\n<p><span class=\"VIiyi\" lang=\"fr\"><span class=\"JLqJ4b\" data-language-for-alternatives=\"fr\" data-language-to-translate-into=\"auto\" data-phrase-index=\"0\"><span>Les satellites sont au d\u00e9part destin\u00e9s \u00e0 transmettre des donn\u00e9es broadband, mais l&rsquo;une des raisons de l&rsquo;accord \u00e9tait la possibilit\u00e9 de fournir un service de positionnement alternatif. Ceci est de plus en plus important car le Royaume-Uni ne fait plus partie du syst\u00e8me de positionnement europ\u00e9en Galileo qui utilise des satellites \u00e0 une altitude de 23 222 km au lieu des 1 200 km pour OneWeb.<\/span><\/span><\/span><\/p>\n<p><span class=\"VIiyi\" lang=\"fr\"><span class=\"JLqJ4b\" data-language-for-alternatives=\"fr\" data-language-to-translate-into=\"auto\" data-phrase-index=\"0\"><span>\u00c0 l&rsquo;\u00e9poque, il y avait beaucoup de commentateurs expliquaient que la r\u00e9affectation des satellites OneWeb pour fournir le GPS n&rsquo;\u00e9tait pas possible.<\/span><\/span><\/span><\/p>\n<p><span class=\"VIiyi\" lang=\"fr\"><span class=\"JLqJ4b\" data-language-for-alternatives=\"fr\" data-language-to-translate-into=\"auto\" data-phrase-index=\"0\"><span>\u00c0 pr\u00e9sent, un chercheur \u00e9minent de l&rsquo;universit\u00e9 du Texas a expliqu\u00e9 comment une constellation LEO telle que OneWeb ou SpaceX StarLink pourrait \u00eatre utilis\u00e9e pour fournir un service de positionnement, de navigation et de synchronisation (PNT) moins sensible aux interf\u00e9rences et au bruit. Cela permettrait une pr\u00e9cision beaucoup plus \u00e9lev\u00e9e de 70 cm et pourrait \u00eatre obtenu par une mise \u00e0 niveau du logiciel.<\/span><\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><a href=\"https:\/\/www.eenewseurope.com\/news\/satellite-servers-sky-aim-global-broadband\">SERVERS IN THE SKY AIM FOR GLOBAL BROADBAND<\/a><\/li>\n<\/ul>\n<p><span class=\"VIiyi\" lang=\"fr\"><span class=\"JLqJ4b\" data-language-for-alternatives=\"fr\" data-language-to-translate-into=\"auto\" data-phrase-index=\"0\"><span>L&rsquo;article sur un GNSS en orbite terrestre basse, par Peter Iannucci de l&rsquo;Universit\u00e9 du Texas \u00e0 Austin et Todd Humphreys, chef du laboratoire de radionavigation \u00e0 l&rsquo;universit\u00e9, d\u00e9taille une fa\u00e7on de prendre les signaux de synchronisation des r\u00e9seaux de satellites GNSS existants et les fusionner avec les donn\u00e9es envoy\u00e9es au sol. Cela signifierait \u00e9galement que les r\u00e9cepteurs pourraient \u00eatre beaucoup moins co\u00fbteux.<\/span><\/span><\/span><\/p>\n<p><span class=\"VIiyi\" lang=\"fr\"><span class=\"JLqJ4b\" data-language-for-alternatives=\"fr\" data-language-to-translate-into=\"auto\" data-phrase-index=\"0\"><span>Cela fournirait un service PNT assur\u00e9 en continu sur une latitude de \u00b1 60 \u00b0, couvrant 99,8% de la population mondiale avec des performances de positionnement sup\u00e9rieures au pseudo-positionnement de la GNSS traditionnelle. Cela utilise \u00e9galement moins de 0,8% de la capacit\u00e9 de liaison descendante du r\u00e9seau Starlink.<\/span><\/span><\/span><\/p>\n<p><strong>Lire aussi:<\/strong><\/p>\n<p><a href=\"http:\/\/OneWeb va lancer 36 satellites LEO fabriqu\u00e9s par Airbus\">OneWeb va lancer 36 satellites LEO fabriqu\u00e9s par Airbus<\/a><\/p>\n<p><a href=\"https:\/\/www.electronique-eci.com\/news\/oneweb-rachete-par-la-grande-bretagne-et-linde\">OneWeb rachet\u00e9 par la Grande Bretagne et l&rsquo;Inde<\/a><\/p>\n<p><a href=\"https:\/\/www.electronique-eci.com\/news\/le-gouvernement-uk-veut-sauver-oneweb-pour-creer-son-propre-gps-un-pari-risque\">Le gouvernement UK veut sauver OneWeb pour cr\u00e9er son propre GPS: un pari risqu\u00e9&#8230;<\/a><\/p>\n<p><a href=\"https:\/\/arxiv.org\/abs\/2009.12334\">https:\/\/arxiv.org\/abs\/2009.12334<\/a><\/p>\n<p><strong>Related OneWeb articles<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.eenewseurope.com\/news\/oneweb-service-2021\">LAUNCH SEES COMMERCIAL SERVICE IN 2021<\/a><\/li>\n<li><a href=\"https:\/\/www.eenewseurope.com\/news\/oneweb-satellite-consortium-expands-hughes\">CONSORTIUM EXPANDS WITH HUGHES<\/a><\/li>\n<li><a href=\"https:\/\/www.eenewseurope.com\/news\/uk-india-buy-oneweb\">UK, INDIA LOOK TO POSITIONING SERVICE<\/a><\/li>\n<\/ul>\n<p>\u200b<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une mise \u00e0 jour du logiciel LEO GNSS pourrait fournir un service de positionnement \u00e0 la constellation de satellites OneWeb<\/p>\n","protected":false},"author":12,"featured_media":162982,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[916,910,917,915],"domains":[47],"ppma_author":[1144],"class_list":["post-38428","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","tag-rf-transmission-fr","tag-sensing-conditioning-fr","tag-software-embedded-tools-fr","tag-wireless-communications-fr","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Un logiciel permet un service GPS avec les satellites LEO ...<\/title>\n<meta name=\"description\" content=\"Une mise \u00e0 jour du logiciel LEO GNSS pourrait fournir un service de positionnement \u00e0 la constellation de satellites OneWeb\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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