{"id":7746,"date":"2022-07-06T15:15:17","date_gmt":"2022-07-06T13:15:17","guid":{"rendered":"https:\/\/guide-gnss.com\/?page_id=7746"},"modified":"2024-10-15T12:58:46","modified_gmt":"2024-10-15T10:58:46","slug":"haute-precision","status":"publish","type":"page","link":"https:\/\/guide-gnss.com\/fr\/haute-precision\/","title":{"rendered":"Haute Pr\u00e9cision GNSS \u2013 Essais dans des conditions r\u00e9elles"},"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\u00bbHaute pr\u00e9cision GNSS\u00a0\u00bb subhead=\u00a0\u00bbEssais dans des conditions r\u00e9elles avec donn\u00e9es d&rsquo;assistance\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;\">D\u00c9FINITION<br \/><span><\/span><\/h2>\n<p><span><\/span><\/p>\n<p style=\"text-align: justify;\">Un r\u00e9cepteur GNSS assist\u00e9 de donn\u00e9es de correction\/augmentation est capable de converger \u00e0 quelques centim\u00e8tres. N\u00e9anmoins, nous d\u00e9signerons un service de haute pr\u00e9cision pour des mesures inf\u00e9rieures \u00e0 un pied (33cm).<\/p>\n<p style=\"text-align: justify;\">Cette performance d\u00e9pend de plusieurs conditions, parmi lesquelles :<\/p>\n<ul>\n<li style=\"text-align: justify;\">Technologie du service d\u2019assistance (<span style=\"color: #3366ff;\"><a href=\"https:\/\/www.reseau-teria.com\/2020\/04\/27\/quest-ce-que-le-ppp-en-gnss\/\" style=\"color: #3366ff;\" target=\"_blank\" rel=\"noopener\">PPP<\/a><\/span>, PPP-RTK, <span style=\"color: #3366ff;\"><a href=\"https:\/\/www.reseau-teria.com\/2022\/01\/07\/rtk-nrtk\/\" target=\"_blank\" rel=\"noopener\" style=\"color: #3366ff;\">RTK, NRTK<\/a><\/span>,\u2026) ;<\/li>\n<li style=\"text-align: justify;\">Densit\u00e9 du r\u00e9seau de stations fixes de r\u00e9f\u00e9rence\u00a0;<\/li>\n<li style=\"text-align: justify;\">Nombre de bandes de fr\u00e9quences GNSS trait\u00e9\u00a0;<\/li>\n<li style=\"text-align: justify;\">Constellations prises en charge par le service d\u2019assistance\u00a0;<\/li>\n<li style=\"text-align: justify;\">Localisation du r\u00e9cepteur par rapport aux r\u00e9seaux de stations\u00a0;<\/li>\n<li style=\"text-align: justify;\">Mod\u00e8le de r\u00e9cepteurs GNSS\u00a0;<\/li>\n<li style=\"text-align: justify;\">Mod\u00e8le d\u2019antenne de r\u00e9ception des signaux GNSS\u00a0;<\/li>\n<li style=\"text-align: justify;\">Disponibilit\u00e9 et qualit\u00e9 des moyens de t\u00e9l\u00e9communication pour les donn\u00e9es d\u2019assistance en temps r\u00e9el ;<\/li>\n<li style=\"text-align: justify;\">\u2026<strong><\/strong><\/li>\n<\/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\/2024\/01\/240124-gnss-haute-precision.jpg\u00a0\u00bb alt=\u00a0\u00bbHigh Accuracy GNSS\u00a0\u00bb title_text=\u00a0\u00bbGNSS hypergeolocalisation\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 \u2013 \u00c9valuation des performances GNSS de haute pr\u00e9cision<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 style=\"text-align: justify;\"><strong>Crit\u00e8res de performance<br \/><\/strong><\/h2>\n<p style=\"text-align: justify;\">La pr\u00e9cision en position statique est souvent la premi\u00e8re caract\u00e9ristique mise en avant pour d\u00e9finir un r\u00e9cepteur ou un service d\u2019assistance. Pourtant, d\u2019autres crit\u00e8res sont souvent beaucoup plus d\u00e9terminants pour le bon fonctionnement d\u2019une application donn\u00e9e, comme par exemple :<\/p>\n<ul>\n<li style=\"text-align: justify;\">Pr\u00e9cision en mode dynamique, c\u2019est-\u00e0-dire en mouvement\u00a0;<\/li>\n<li style=\"text-align: justify;\">R\u00e9silience aux perturbations de <span style=\"color: #3366ff;\"><a href=\"https:\/\/www.youtube.com\/channel\/UCkgddF2NHnrQ9gf-cgTdVkA\" style=\"color: #3366ff;\">l\u2019environnement local (ponts, feuillages, infrastructures (multipath)<\/a>,<\/span>\u2026) ;<\/li>\n<li style=\"text-align: justify;\">Temps de (re)convergence vers la haute pr\u00e9cision ;<\/li>\n<li style=\"text-align: justify;\">Auto-estimation des erreurs ;<\/li>\n<li style=\"text-align: justify;\">Sensibilit\u00e9 aux al\u00e9as des moyens de t\u00e9l\u00e9communication ;<\/li>\n<li style=\"text-align: justify;\">&#8230;<strong><\/strong><strong><\/strong><\/li>\n<\/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\/2022\/07\/Certification-des-performances-GNSS-haute-precision-.jpg\u00a0\u00bb alt=\u00a0\u00bbCertification des performances GNSS caract\u00e9risant la haute pr\u00e9cision\u00a0\u00bb title_text=\u00a0\u00bbCertification des performances GNSS caract\u00e9risant la haute pr\u00e9cision\u00a0\u00bb show_in_lightbox=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/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 \u2013 Certification des performances GNSS caract\u00e9risant la haute pr\u00e9cision<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 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 style=\"text-align: justify;\"><strong>MOYENS DE M\u00c9TROLOGIE <br \/><\/strong><\/h2>\n<p style=\"text-align: justify;\">Les m\u00e9thodes de mesurage appliqu\u00e9es, pour \u00eatre utiles, doivent \u00eatre parfaitement repr\u00e9sentatives des conditions d\u2019utilisation du syst\u00e8me de haute pr\u00e9cision (service, r\u00e9cepteur, antenne) retenu pour les essais.<\/p>\n<p style=\"text-align: justify;\">La v\u00e9rit\u00e9 terrain doit \u00eatre consolid\u00e9e avec une instrumentation de r\u00e9f\u00e9rence capable de maintenir l\u2019exactitude de la trajectoire r\u00e9elle suivie par l\u2019antenne utilis\u00e9e lors des essais.<\/p>\n<p style=\"text-align: justify;\">Elle se compose, en g\u00e9n\u00e9ral, des \u00e9l\u00e9ments suivants\u00a0:<\/p>\n<p style=\"text-align: justify;\">\n<ul>\n<li style=\"text-align: justify;\">Station fixe\u00a0;<\/li>\n<li style=\"text-align: justify;\">R\u00e9cepteur et antenne GNSS professionnels\u00a0;<\/li>\n<li style=\"text-align: justify;\">Unit\u00e9 inertielle (mesures angulaires des assiettes&lt;&lt;0,1\u00b0) ;<\/li>\n<li style=\"text-align: justify;\">Odom\u00e8tre pour les campagnes de collecte en milieu contraint\u00a0;<\/li>\n<li style=\"text-align: justify;\">Outils de post-traitement des mesures GNSS (PPK) et inertielles ;<strong><\/strong><strong><\/strong><\/li>\n<li style=\"text-align: justify;\">&#8230;<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">Cette instrumentation de r\u00e9f\u00e9rence d\u00e9termine la qualit\u00e9 des r\u00e9sultats. Ses mesures suppos\u00e9es exactes, modulo des incertitudes d\u00fbment estim\u00e9es, sont compar\u00e9es avec celles des objets d\u2019essais.<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\/2022\/07\/Distribution-des-incertitudes-v2.png\u00a0\u00bb alt=\u00a0\u00bbDistribution des incertitudes en fonction de la probabilit\u00e9 de rester dans les intervalles de mesure suivants, 68% (1\u03c3), 95% (2\u03c3) et 99% (3\u03c3) des mesures\u00a0\u00bb title_text=\u00a0\u00bbDistribution des incertitudes GNSS\u00a0\u00bb show_in_lightbox=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/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 \u2013 Distribution des incertitudes en fonction de la probabilit\u00e9 de rester dans les intervalles de mesure suivants, 68% (1\u03c3), 95% (2\u03c3) et 99% (3\u03c3) des mesures<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<p style=\"text-align: justify;\"><strong>GUIDE est accr\u00e9dit\u00e9** pour ses comp\u00e9tences dans l\u2019utilisation de cette instrumentation et l\u2019application de ses m\u00e9thodes. En particulier, GUIDE garantie l\u2019exactitude des trajectoires de r\u00e9f\u00e9rence \u00e9tablies et justifie le calcul de ses incertitudes de mesures.<\/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\/2022\/07\/Incertitudes-instrumentales.jpg\u00a0\u00bb alt=\u00a0\u00bbCes incertitudes instrumentales d\u00e9pendent \u00e0 la fois de l\u2019instrumentation et des perturbations rencontr\u00e9es sur le parcours\u00a0\u00bb title_text=\u00a0\u00bbIncertitudes instrumentales GNSS\u00a0\u00bb show_in_lightbox=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.16&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/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 4 \u2013 Ces incertitudes instrumentales d\u00e9pendent \u00e0 la fois de l\u2019instrumentation et des perturbations rencontr\u00e9es sur le parcours<br \/><\/em><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>D\u00c9FINITION Un r\u00e9cepteur GNSS assist\u00e9 de donn\u00e9es de correction\/augmentation est capable de converger \u00e0 quelques centim\u00e8tres. N\u00e9anmoins, nous d\u00e9signerons un service de haute pr\u00e9cision pour des mesures inf\u00e9rieures \u00e0 un pied (33cm). Cette performance d\u00e9pend de plusieurs conditions, parmi lesquelles : Technologie du service d\u2019assistance (PPP, PPP-RTK, RTK, NRTK,\u2026) ; Densit\u00e9 du r\u00e9seau de stations [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":9271,"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>Haute Pr\u00e9cision GNSS \u2013 Essais dans des conditions r\u00e9elles<\/title>\n<meta name=\"description\" content=\"Un r\u00e9cepteur peut \u00eatre capable de converger \u00e0 quelques centim\u00e8tres. 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