{"id":13467,"date":"2026-07-09T14:18:46","date_gmt":"2026-07-09T12:18:46","guid":{"rendered":"https:\/\/www.cailabs.com\/case-studies\/ground-to-satellite-optical-communications-using-existing-inter-satellite-terminals\/"},"modified":"2026-07-09T15:46:06","modified_gmt":"2026-07-09T13:46:06","slug":"communications-optiques-sol-satellite-a-partir-de-terminaux-inter-satellites-existants","status":"publish","type":"case-study","link":"https:\/\/www.cailabs.com\/fr\/etudes-de-cas\/aerospatial-et-defense\/communications-optiques-sol-satellite-a-partir-de-terminaux-inter-satellites-existants\/","title":{"rendered":"Communications optiques sol-satellite \u00e0 partir de terminaux inter-satellites existants"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-h-5-font-size\"><strong>D\u00e9montr\u00e9 en orbite par Cailabs et Kepler Communications<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cailabs a d\u00e9montr\u00e9 avec succ\u00e8s que des communications optiques satellite-sol peuvent \u00eatre r\u00e9alis\u00e9es \u00e0 partir de terminaux optiques inter-satellites d\u00e9j\u00e0 d\u00e9ploy\u00e9s, ouvrant de nouvelles perspectives pour une connectivit\u00e9 spatiale s\u00e9curis\u00e9e et r\u00e9siliente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-h-5-font-size\"><strong>L\u2019innovation<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">a d\u00e9montr\u00e9 une nouvelle approche : <strong>r\u00e9utiliser des terminaux optiques satellite-satellite existants pour \u00e9tablir une communication directe satellite-sol.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette approche supprime le besoin de nouvelles charges utiles en orbite et permet :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Un d\u00e9ploiement rapide de liaisons optiques descendantes<\/li>\n\n\n\n<li>Une r\u00e9duction des co\u00fbts d\u2019infrastructure<\/li>\n\n\n\n<li>Une mise \u00e0 l\u2019\u00e9chelle imm\u00e9diate \u00e0 partir de constellations existantes<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-h-5-font-size\"><strong><strong>Valid\u00e9 en orbite<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cailabs a men\u00e9 des essais \u00e0 la demande de l\u2019entreprise canadienne Kepler Communications Inc., avec pour objectif de valider la conformit\u00e9 aux standards SDA \u00e0 partir de terminaux de communication satellite-satellite. Cette validation est r\u00e9alis\u00e9e avec un satellite LEO op\u00e9rationnel de Kepler, \u00e9quip\u00e9 de deux terminaux bidirectionnels Tesat SCOT80 mont\u00e9s \u00e0 l\u2019avant et \u00e0 l\u2019arri\u00e8re du satellite. Plus de quarante tests satellite-sol ont \u00e9t\u00e9 conduits et ces campagnes ont d\u00e9montr\u00e9 des communications optiques sans erreur au-dessus de 20\u00b0 d\u2019\u00e9l\u00e9vation ainsi qu\u2019une acquisition fiable jusqu\u2019\u00e0 10\u00b0 d\u2019\u00e9l\u00e9vation, avec plusieurs gigaoctets de donn\u00e9es transmis \u00e0 chaque passe satellite. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En mai 2025, Kepler a annonc\u00e9 avoir atteint les performances d\u2019acquisition et de d\u00e9bit conformes aux standards SDA dans plusieurs sc\u00e9narios espace-sol entre son satellite optique Pathfinder en orbite basse (Low Earth Orbit \u2013 LEO) et la station sol optique (Optical Ground Station \u2013 OGS) de Cailabs \u00e0 Rennes, en France. Cette \u00e9tape confirme que la connectivit\u00e9 satellite-sol est r\u00e9alisable \u00e0 partir de terminaux satellite-satellite d\u00e9j\u00e0 d\u00e9ploy\u00e9s.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-h-5-font-size\"><strong><strong>Pourquoi c\u2019est important<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cette avanc\u00e9e apporte une valeur imm\u00e9diate aux op\u00e9rateurs, aux institutions et aux acteurs de la d\u00e9fense :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u00e9ploiement acc\u00e9l\u00e9r\u00e9 : <\/strong>pas besoin d\u2019attendre de nouveaux satellites, les infrastructures existantes peuvent \u00eatre exploit\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>R\u00e9duction des co\u00fbts : <\/strong>\u00e9vite le d\u00e9veloppement et le lancement de charges utiles suppl\u00e9mentaires.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>S\u00e9curit\u00e9 renforc\u00e9e : <\/strong>les communications optiques sont intrins\u00e8quement r\u00e9sistantes au brouillage et \u00e0 l\u2019interception.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Flexibilit\u00e9 op\u00e9rationnelle : <\/strong>adaptable \u00e0 un large \u00e9ventail de missions, du transfert de donn\u00e9es commerciales aux communications de d\u00e9fense. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les constellations d\u00e9j\u00e0 lanc\u00e9es ou planifi\u00e9es int\u00e9grant des liaisons optiques inter-satellites peuvent \u00eatre exploit\u00e9es pour offrir des liaisons optiques satellite-sol, ouvrant la voie \u00e0 de nouveaux services tels que le transfert s\u00e9curis\u00e9 de donn\u00e9es, les communications tactiques, l\u2019exfiltration rapide de donn\u00e9es ou le transfert haut d\u00e9bit de donn\u00e9es d\u2019observation de la Terre, sans ajout de nouveaux moyens spatiaux.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-h-5-font-size\"><strong><strong>Un nouveau paradigme pour les communications spatiales<\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En \u00e9tendant le r\u00f4le des terminaux optiques inter-satellites aux communications avec le sol, Cailabs rend possible une nouvelle g\u00e9n\u00e9ration de r\u00e9seaux optiques hybrides, plus r\u00e9silients, plus \u00e9volutifs et pr\u00eats pour un d\u00e9ploiement imm\u00e9diat.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\" style=\"margin-top:var(--wp--preset--spacing--50);margin-bottom:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.calameo.com\/read\/0075718766e813c17d3ec\" target=\"_blank\" rel=\"noreferrer noopener\">T\u00e9l\u00e9charger l&rsquo;\u00e9tude de cas (en anglais)<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>D\u00e9montr\u00e9 en orbite par Cailabs et Kepler Communications Cailabs a d\u00e9montr\u00e9 avec succ\u00e8s que des communications optiques satellite-sol peuvent \u00eatre r\u00e9alis\u00e9es \u00e0 partir de terminaux optiques inter-satellites d\u00e9j\u00e0 d\u00e9ploy\u00e9s, ouvrant de nouvelles perspectives pour une connectivit\u00e9 spatiale s\u00e9curis\u00e9e et r\u00e9siliente. L\u2019innovation a d\u00e9montr\u00e9 une nouvelle approche : r\u00e9utiliser des terminaux optiques satellite-satellite existants pour \u00e9tablir [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":13465,"parent":0,"template":"","categorie-case-study":[146],"class_list":["post-13467","case-study","type-case-study","status-publish","has-post-thumbnail","hentry","categorie-case-study-aerospatial-et-defense"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Etude de cas | Communications optiques sol-satellite \u00e0 partir de terminaux inter-satellites existants<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cailabs.com\/fr\/etudes-de-cas\/aerospatial-et-defense\/communications-optiques-sol-satellite-a-partir-de-terminaux-inter-satellites-existants\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Etude de cas | Communications optiques sol-satellite \u00e0 partir de terminaux inter-satellites existants\" \/>\n<meta property=\"og:description\" content=\"D\u00e9montr\u00e9 en orbite par Cailabs et Kepler Communications Cailabs a d\u00e9montr\u00e9 avec succ\u00e8s que des communications optiques satellite-sol peuvent \u00eatre r\u00e9alis\u00e9es \u00e0 partir de terminaux optiques inter-satellites d\u00e9j\u00e0 d\u00e9ploy\u00e9s, ouvrant de nouvelles perspectives pour une connectivit\u00e9 spatiale s\u00e9curis\u00e9e et r\u00e9siliente. 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