{"id":8298,"date":"2023-04-19T11:25:46","date_gmt":"2023-04-19T09:25:46","guid":{"rendered":"https:\/\/guide-gnss.com\/?page_id=8298"},"modified":"2024-10-15T13:13:01","modified_gmt":"2024-10-15T11:13:01","slug":"brouillage-guide-gnss","status":"publish","type":"page","link":"https:\/\/guide-gnss.com\/fr\/brouillage-guide-gnss\/","title":{"rendered":"Brouillage"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00a0\u00bb1&Prime; fullwidth=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.16&Prime; saved_tabs=\u00a0\u00bball\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_fullwidth_header title=\u00a0\u00bb\u00c9valuation des capacit\u00e9s des syst\u00e8mes de positionnement GNSS \u00e0 d\u00e9tecter et att\u00e9nuer les effets des brouilleurs\u00a0\u00bb subhead=\u00a0\u00bbQuelle est la pr\u00e9cision de vos mesures de position, de vitesse et d\u2019orientation en cas de brouillage ?\u00a0\u00bb _builder_version=\u00a0\u00bb4.16&Prime; title_font=\u00a0\u00bbMontserrat|700|||||||\u00a0\u00bb title_text_align=\u00a0\u00bbcenter\u00a0\u00bb title_font_size=\u00a0\u00bb32px\u00a0\u00bb title_letter_spacing=\u00a0\u00bb3px\u00a0\u00bb subhead_font=\u00a0\u00bbMontserrat|600|||||||\u00a0\u00bb subhead_text_align=\u00a0\u00bbcenter\u00a0\u00bb subhead_font_size=\u00a0\u00bb20px\u00a0\u00bb use_background_color_gradient=\u00a0\u00bbon\u00a0\u00bb background_color_gradient_stops=\u00a0\u00bb#375882 0%|#4370a0 100%\u00a0\u00bb background_color_gradient_start=\u00a0\u00bb#375882&Prime; background_color_gradient_end=\u00a0\u00bb#4370a0&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=\u00a0\u00bb1&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb width=\u00a0\u00bb100%\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row column_structure=\u00a0\u00bb1_2,1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb min_height=\u00a0\u00bb375.5px\u00a0\u00bb custom_margin=\u00a0\u00bb-12px|auto||auto||\u00a0\u00bb custom_padding=\u00a0\u00bb0px|||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.21.0&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<h2 style=\"text-align: justify;\">Qu&rsquo;EST CE QU&rsquo;UN BROUILLAGE GNSS?<span><\/span><\/h2>\n<p style=\"text-align: justify;\">Les brouilleurs GNSS repr\u00e9sentent une menace importante pour les applications critiques dans le domaine du transport et de l&rsquo;agriculture.<\/p>\n<p style=\"text-align: justify;\">Ces dispositifs de radiofr\u00e9quence peuvent perturber les signaux GNSS utilis\u00e9s pour la navigation a\u00e9rienne, ferroviaire, routi\u00e8re, fluviale et maritime. En effet, ces ondes interf\u00e8rent avec les signaux GNSS et peuvent conduire \u00e0 des interruptions de services. Mais aussi provoquer des accidents.<\/p>\n<p style=\"text-align: justify;\">Par exemple, dans le secteur de l&rsquo;agriculture, les signaux GNSS sont largement utilis\u00e9s pour la gestion des cultures. Ces perturbations peuvent entra\u00eener de fortes diminutions de la productivit\u00e9 et m\u00eame des pertes de r\u00e9coltes.<\/p>\n<p style=\"text-align: justify;\">Il est donc essentiel de mettre en place des contre-mesures pour d\u00e9tecter la pr\u00e9sence de <span style=\"color: #000000;\">brouilleurs <\/span>et en att\u00e9nuer les effets sur la pr\u00e9cision des mesures de g\u00e9olocalisation.<\/p>\n<p style=\"text-align: justify;\"><strong><\/strong><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00a0\u00bb1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_image src=\u00a0\u00bbhttps:\/\/guide-gnss.com\/wp-content\/uploads\/2024\/01\/240124-brouillage-gnss.jpg\u00a0\u00bb alt=\u00a0\u00bbGNSS jamming\u00a0\u00bb title_text=\u00a0\u00bbBrouillage GNSS\u00a0\u00bb _builder_version=\u00a0\u00bb4.21.0&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb sticky_enabled=\u00a0\u00bb0&Prime;][\/et_pb_image][et_pb_text _builder_version=\u00a0\u00bb4.16&Prime; text_font_size=\u00a0\u00bb10px\u00a0\u00bb locked=\u00a0\u00bboff\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<p style=\"text-align: center;\"><em>Figure 1 &#8211; Brouillage GNSS<br \/><\/em><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00a0\u00bb1_2,1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb min_height=\u00a0\u00bb375.5px\u00a0\u00bb custom_margin=\u00a0\u00bb-12px|auto||auto||\u00a0\u00bb custom_padding=\u00a0\u00bb0px|||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<h2><strong>RESILIENCE AU BROUILLAGE GNSS<\/strong><\/h2>\n<p style=\"text-align: justify;\">Ainsi, des essais sont n\u00e9cessaires pour \u00e9valuer les capacit\u00e9s de d\u00e9tection et de r\u00e9silience des syst\u00e8mes de positionnement contre les brouilleurs des signaux GNSS.<\/p>\n<p style=\"text-align: justify;\">Il s\u2019agit d\u2019\u00e9valuer la sensibilit\u00e9 de d\u00e9tection de ces signaux de brouillage et de d\u00e9terminer leurs cons\u00e9quences sur la pr\u00e9cision des mesures de positions, de vitesses et d\u2019orientations angulaires.<\/p>\n<p style=\"text-align: justify;\">Pour \u00eatre exploitables, ces essais sont r\u00e9alis\u00e9s dans des conditions r\u00e9elles ou assimil\u00e9es, avec des interf\u00e9rences repr\u00e9sentatives des brouilleurs susceptibles d\u2019\u00eatre utilis\u00e9s. En effet, les signaux interf\u00e9rents impactent diff\u00e9remment un r\u00e9cepteur dans un environnement rural ou urbain.<\/p>\n<p style=\"text-align: justify;\">Les r\u00e9sultats de ces essais fournissent des analyses indispensables pour estimer la robustesse des syst\u00e8mes de positionnement. Ils donneront \u00e9galement des indications cruciales sur le niveau de vuln\u00e9rabilit\u00e9 des applications int\u00e9grant ces technologies GNSS.<\/p>\n<ul><\/ul>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00a0\u00bb1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_image src=\u00a0\u00bbhttps:\/\/guide-gnss.com\/wp-content\/uploads\/2023\/04\/shutterstock_1844681434-WEB-scaled.jpg\u00a0\u00bb alt=\u00a0\u00bbResilience to GNSS jamming\u00a0\u00bb title_text=\u00a0\u00bbMenaces du brouillage GNSS agriculture\u00a0\u00bb _builder_version=\u00a0\u00bb4.21.0&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb sticky_enabled=\u00a0\u00bb0&Prime;][\/et_pb_image][et_pb_text _builder_version=\u00a0\u00bb4.16&Prime; text_font_size=\u00a0\u00bb10px\u00a0\u00bb locked=\u00a0\u00bboff\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<p style=\"text-align: center;\"><em>Figure 2 &#8211; Menaces du brouillage dans l&rsquo;agriculture<br \/><\/em><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00a0\u00bb1_2,1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb min_height=\u00a0\u00bb375.5px\u00a0\u00bb custom_margin=\u00a0\u00bb-12px|auto||auto||\u00a0\u00bb custom_padding=\u00a0\u00bb0px|||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.21.0&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<h2><strong>CERTIFICATS D&rsquo;ESSAIS DES CONTREMESURES AU BROUILLAGE GNSS<\/strong><\/h2>\n<p style=\"text-align: justify;\">Selon les syst\u00e8mes de positionnement \u00e0 \u00e9valuer, il existe plusieurs m\u00e9thodes d\u2019essais susceptibles d\u2019\u00eatre mises en \u0153uvre.<\/p>\n<p style=\"text-align: justify;\">A proprement parler, la sensibilit\u00e9 d\u2019un r\u00e9cepteur GNSS \u00e0 des signaux de brouillage donn\u00e9s peut \u00eatre \u00e9valu\u00e9e en <a href=\"https:\/\/guide-gnss.com\/fr\/essais-gnss-simulateur-de-constellations\/\"><span style=\"color: #3366ff;\">simulation<\/span><\/a>. La puissance de ces interf\u00e9rents est alors augment\u00e9e progressivement jusqu\u2019aux seuils d\u2019alertes et de saturation.<\/p>\n<p style=\"text-align: justify;\">N\u00e9anmoins dans le monde r\u00e9el, ces perturbations sont aggrav\u00e9es avec celles caus\u00e9es par <a href=\"https:\/\/guide-gnss.com\/fr\/metrologie-essais-gnss\/\">l\u2019<span style=\"color: #0073d1;\">environnement local<\/span><\/a> comme les ponts, les b\u00e2timents, les feuillages ou encore les reliefs. Dans le domaine maritime, le tangage des navires et les ph\u00e9nom\u00e8nes de diffraction des signaux GNSS sur la houle sont autant d\u2019\u00e9l\u00e9ments \u00e0 prendre en compte pour \u00e9tablir des <a href=\"https:\/\/guide-gnss.com\/geolocation-accredited-test-lab\/\"><span style=\"color: #3366ff;\">d\u00e9clarations de conformit\u00e9 sous accr\u00e9ditation<\/span>.<\/a><\/p>\n<p style=\"text-align: justify;\">Sur la base de la norme europ\u00e9enne <span style=\"color: #0073d1;\"><a href=\"https:\/\/www.en-standard.eu\/csn-en-16803-3-space-use-of-gnss-based-positioning-for-road-intelligent-transport-systems-its-part-3-assessment-of-security-performances-of-gnss-based-positioning-terminals\/\" style=\"color: #0073d1;\">EN16803-3<\/a><\/span>, la technique du rejeu est parfaitement adapt\u00e9e pour produire des essais repr\u00e9sentatifs, r\u00e9p\u00e9tables et reproductibles.<\/p>\n<p style=\"text-align: justify;\">Dans le cas des syst\u00e8mes de positionnement fortement hybrid\u00e9s, certains essais doivent \u00eatre men\u00e9s \u00e0 bord du v\u00e9hicule porteur-type (automobile, train, bateau\u2026). Notre laboratoire d\u2019essais est \u00e9quip\u00e9 pour les mener en s\u00e9curit\u00e9 et sans g\u00eaner les autres terminaux GNSS.<\/p>\n<p style=\"text-align: justify;\">Les conclusions de ces essais contribueront \u00e0 la s\u00e9lection de la solution la plus adapt\u00e9e et \u00e0 l\u2019impl\u00e9mentation de fonctions de positionnement plus fiables.<\/p>\n<ul><\/ul>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00a0\u00bb1_2&Prime; _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_image src=\u00a0\u00bbhttps:\/\/guide-gnss.com\/wp-content\/uploads\/2023\/05\/brouillage-fig3.jpg\u00a0\u00bb title_text=\u00a0\u00bbMesures de brouillage GNSS\u00a0\u00bb show_in_lightbox=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.21.0&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb alt=\u00a0\u00bbJamming Test GNSS\u00a0\u00bb sticky_enabled=\u00a0\u00bb0&Prime;][\/et_pb_image][et_pb_text _builder_version=\u00a0\u00bb4.16&Prime; text_font_size=\u00a0\u00bb10px\u00a0\u00bb locked=\u00a0\u00bboff\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<p style=\"text-align: center;\"><em>Figure 3 (haut) &#8211; Mesures de brouillage constat\u00e9es en situation r\u00e9elle<br \/><\/em><\/p>\n<p style=\"text-align: center;\"><em>Figure 4 (bas) &#8211; Simulation d&rsquo;une attaque GNSS<\/em><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu&rsquo;EST CE QU&rsquo;UN BROUILLAGE GNSS? Les brouilleurs GNSS repr\u00e9sentent une menace importante pour les applications critiques dans le domaine du transport et de l&rsquo;agriculture. Ces dispositifs de radiofr\u00e9quence peuvent perturber les signaux GNSS utilis\u00e9s pour la navigation a\u00e9rienne, ferroviaire, routi\u00e8re, fluviale et maritime. En effet, ces ondes interf\u00e8rent avec les signaux GNSS et peuvent conduire [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":9221,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.11 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Brouillage - GUIDE GNSS<\/title>\n<meta name=\"description\" content=\"\u00c9valuation des capacit\u00e9s de positionnement GNSS \u00e0 d\u00e9tecter et att\u00e9nuer les effets du brouillage - GUIDE GNSS\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/guide-gnss.com\/fr\/brouillage-guide-gnss\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Brouillage - 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