{"id":11640,"date":"2021-07-14T12:35:01","date_gmt":"2021-07-14T10:35:01","guid":{"rendered":"http:\/\/volcanx.cluster031.hosting.ovh.net\/?page_id=11640"},"modified":"2021-07-14T19:23:51","modified_gmt":"2021-07-14T17:23:51","slug":"insar","status":"publish","type":"page","link":"https:\/\/volcanofoundation.org\/fr\/renforcer-la-connaissance-des-risques\/monitoring\/deformation\/insar\/","title":{"rendered":"InSAR"},"content":{"rendered":"<div id=\"av_section_1\" class=\"avia-section av-av_section-a3505495476c97acb77226663f388d50 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  avia-full-stretch av-parallax-section avia-bg-style-parallax av-minimum-height av-minimum-height-25 av-height-25  container_wrap fullsize\" data-section-bg-repeat=\"stretch\" data-av_minimum_height_pc=\"25\" data-av_min_height_opt=\"25\"><div class=\"av-parallax\" data-avia-parallax-ratio=\"0.3\"><div class=\"av-parallax-inner main_color avia-full-stretch\"><\/div><\/div><div class=\"container av-section-cont-open\"><main role=\"main\" itemprop=\"mainContentOfPage\" class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11640\"><div class=\"entry-content-wrapper clearfix\">\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182\">\n.flex_column.av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182 av_one_fifth  avia-builder-el-1  el_before_av_three_fifth  avia-builder-el-first  first flex_column_div av-zero-column-padding  \"><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0\">\n.flex_column.av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0 av_three_fifth  avia-builder-el-2  el_after_av_one_fifth  el_before_av_one_fifth  flex_column_div av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9\">\n#top .av_textblock_section.av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section class=\"av_textblock_section av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock av_inherit_color\" itemprop=\"text\"><div class=\"h2-cinta-programas\">\n<h1 style=\"text-align: center; font-size: 2.5em;\">RENFORCER LA CONNAISSANCE DES RISQUES<\/h1>\n<\/div>\n<\/div><\/section><br>\n<section class=\"av_textblock_section av-av_textblock-820f97e5aca1e77a0a12cd8a6430c9f2 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p class=\"p-cinta-programas\" style=\"text-align: center; background: #f5312a !important;\">POURQUOI LA FONDATION EST N&Eacute;E ?<span class=\"flecha-donativo\" style=\"vertical-align: inherit;\"> &gt;<\/span><\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0\">\n.flex_column.av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0 av_one_fifth  avia-builder-el-5  el_after_av_three_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  \"><\/div>\n\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d\">\n.avia-section.av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d{\nbackground-color:#000000;\nbackground-image:unset;\n}\n.avia-section.av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d .av-section-color-overlay{\nopacity:0.9;\nbackground-color:#000000;\n}\n<\/style>\n<div id=\"av_section_2\" class=\"avia-section av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d main_color avia-section-default avia-no-border-styling  avia-builder-el-6  el_after_av_section  el_before_av_textblock  avia-bg-style-fixed av-section-color-overlay-active container_wrap fullsize\"><div class=\"av-section-color-overlay-wrap\"><div class=\"av-section-color-overlay\"><\/div><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11640\"><div class=\"entry-content-wrapper clearfix\">\n<div class=\"flex_column_table av-a5p0bb-0286912bb6bfb93801b9fa33860921b2 sc-av_one_full av-equal-height-column-flextable\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-a5p0bb-0286912bb6bfb93801b9fa33860921b2\">\n.flex_column.av-a5p0bb-0286912bb6bfb93801b9fa33860921b2{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-a5p0bb-0286912bb6bfb93801b9fa33860921b2 av_one_full  avia-builder-el-7  avia-builder-el-no-sibling  first flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-joihkone-69e81b3ac324ed7c1268b0d71e700013\">\n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:18px;\ncolor:#ffffff;\n}\n\n@media only screen and (min-width: 768px) and (max-width: 989px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n<\/style>\n<section class=\"av_textblock_section av-joihkone-69e81b3ac324ed7c1268b0d71e700013 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock av_inherit_color\" itemprop=\"text\"><blockquote>\n<p><a href=\"http:\/\/www.undrr.org\"><strong>LES DISASTERS NE SONT PAS NATURELS<\/strong><\/a>, ils sont construits socialement, par manque de pr&eacute;paration, de pr&eacute;vention, de travail d&rsquo;att&eacute;nuation, d&rsquo;&eacute;ducation et de suivi. <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;CE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Abr&eacute;viation de &amp;quot;l&amp;#039;&egrave;re commune&amp;quot; ou &amp;quot;l&amp;#039;&egrave;re actuelle&amp;quot;. CE se r&eacute;f&egrave;re &agrave; l&amp;#039;ann&eacute;e &eacute;coul&eacute;e depuis le d&eacute;but de l&amp;#039;&egrave;re actuelle dans le calendrier julien ou gr&eacute;gorien, par exemple l&amp;#039;ann&eacute;e civile. L&amp;#039;&egrave;re pr&eacute;c&eacute;dente est appel&eacute;e &amp;quot;Avant l&amp;#039;&egrave;re actuelle&amp;quot; ou BCE.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/ce-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>Ce<\/a> sont des risques ou des dangers naturels qui ont un impact sur les soci&eacute;t&eacute;s vuln&eacute;rables. Les connaissances aident &agrave; <strong>r&eacute;duire la vuln&eacute;rabilit&eacute; sociale<\/strong> et <strong>structurale<\/strong> afin d&rsquo;avoir des soci&eacute;t&eacute;s plus <strong>r&eacute;silientes<\/strong>!<\/p>\n<\/blockquote>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 --><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><\/div><div id=\"after_section_2\" class=\"main_color av_default_container_wrap container_wrap fullsize\"><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11640\"><div class=\"entry-content-wrapper clearfix\"><section class=\"av_textblock_section av-kqt9jd5e-cd33964ef4e3b772df7fef522b816d29 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h2>La technique InSAR-Satellite capture une &laquo;&nbsp;image&nbsp;&raquo; globale de la d&eacute;formation<\/h2>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689\">\n#top .hr.av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689{\nmargin-top:15px;\nmargin-bottom:15px;\n}\n.hr.av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689 .hr-inner{\nwidth:100%;\nborder-color:#d8d8d8;\n}\n<\/style>\n<div class=\"hr av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689 hr-custom  avia-builder-el-10  el_after_av_textblock  el_before_av_three_fifth  hr-center hr-icon-no\"><span class=\"hr-inner inner-border-av-border-thin\"><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2jf8h2d-fa28ff61c7277166c8d3f20e0f367efa\">\n.flex_column.av-2jf8h2d-fa28ff61c7277166c8d3f20e0f367efa{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-2jf8h2d-fa28ff61c7277166c8d3f20e0f367efa av_three_fifth  avia-builder-el-11  el_after_av_hr  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  \"><section class=\"av_textblock_section av-2806t0l-5f936b1e54552344c33d992cca7b403a \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h3>Alors que les donn&eacute;es de d&eacute;formation du sol fournissent des donn&eacute;es en un petit nombre de points de la surface, la m&eacute;thode de l&rsquo;interf&eacute;rom&eacute;trie radar est devenue une v&eacute;ritable r&eacute;volution.<\/h3>\n<p>InSAR (Interferometric Synthetic Aperture Radar) est une technique de cartographie de la <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;D&Eacute;FORMATION&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Changements &agrave; la surface d&amp;#039;un volcan qui se produisent en raison du mouvement du magma sous la surface. La plupart des d&eacute;formations volcaniques ne peuvent &ecirc;tre d&eacute;tect&eacute;es et mesur&eacute;es qu&amp;#039;&agrave; l&amp;#039;aide de techniques d&amp;#039;arpentage pr&eacute;cises telles qu&amp;#039;un syst&egrave;me de positionnement mondial (GPS), un tiltm&egrave;tre, un radar d&amp;#039;ouverture synth&eacute;tique interf&eacute;rom&eacute;trique (InSAR) ou un distancem&egrave;tre &eacute;lectronique (EDM).&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/deformation-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">d&eacute;formation<\/a> du sol <a title=\"DEFORMATION\" href=\"http:\/\/volcanx.cluster031.hosting.ovh.net\/fr\/renforcer-la-connaissance-des-risques\/monitoring\/deformation\/\">d&eacute;formation<\/a> &agrave; l&rsquo;aide d&rsquo;images radar de la surface de la Terre recueillies par des satellites en orbite. Contrairement &agrave; la lumi&egrave;re visible ou infrarouge, les ondes radar traversent la plupart des nuages m&eacute;t&eacute;orologiques et sont tout aussi efficaces dans l&rsquo;obscurit&eacute;. Avec InSAR, il est donc possible de surveiller la <strong><a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;D&Eacute;FORMATION&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Changements &agrave; la surface d&amp;#039;un volcan qui se produisent en raison du mouvement du magma sous la surface. La plupart des d&eacute;formations volcaniques ne peuvent &ecirc;tre d&eacute;tect&eacute;es et mesur&eacute;es qu&amp;#039;&agrave; l&amp;#039;aide de techniques d&amp;#039;arpentage pr&eacute;cises telles qu&amp;#039;un syst&egrave;me de positionnement mondial (GPS), un tiltm&egrave;tre, un radar d&amp;#039;ouverture synth&eacute;tique interf&eacute;rom&eacute;trique (InSAR) ou un distancem&egrave;tre &eacute;lectronique (EDM).&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/deformation-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">d&eacute;formation<\/a> du sol m&ecirc;me par mauvais temps et de nuit<\/strong> &ndash; deux gros avantages lors d&rsquo;une crise volcanique.<\/p>\n<p>Il est possible de comparer deux images radar d&rsquo;une m&ecirc;me zone, recueillies &agrave; des moments diff&eacute;rents depuis des points d&rsquo;observation similaires dans l&rsquo;espace. Tout mouvement de la surface du sol se rapprochant ou s&rsquo;&eacute;loignant du satellite peut &ecirc;tre mesur&eacute; et repr&eacute;sent&eacute; comme une &laquo;&nbsp;image&nbsp;&raquo; &ndash; non pas de la surface elle-m&ecirc;me, mais de la quantit&eacute; de mouvement (<a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;D&Eacute;FORMATION&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Changements &agrave; la surface d&amp;#039;un volcan qui se produisent en raison du mouvement du magma sous la surface. La plupart des d&eacute;formations volcaniques ne peuvent &ecirc;tre d&eacute;tect&eacute;es et mesur&eacute;es qu&amp;#039;&agrave; l&amp;#039;aide de techniques d&amp;#039;arpentage pr&eacute;cises telles qu&amp;#039;un syst&egrave;me de positionnement mondial (GPS), un tiltm&egrave;tre, un radar d&amp;#039;ouverture synth&eacute;tique interf&eacute;rom&eacute;trique (InSAR) ou un distancem&egrave;tre &eacute;lectronique (EDM).&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/deformation-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">d&eacute;formation<\/a>) de la surface entre deux images. Les images sont fournies par des agences spatiales en Italie, en Allemagne, au Canada, au Japon, en Cor&eacute;e, en Europe et aux &Eacute;tats-Unis.<\/p>\n<p>Pour cr&eacute;er cette <a title=\"MONITORING\" href=\"http:\/\/volcanx.cluster031.hosting.ovh.net\/fr\/?page_id=11396\">d&eacute;formation<\/a> &laquo;&nbsp;image&nbsp;&raquo; radar, une impulsion d&rsquo;&eacute;nergie radar est &eacute;mise par un satellite, diffus&eacute;e par la surface de la Terre et enregistr&eacute;e par le satellite avec deux types d&rsquo;informations : l&rsquo;amplitude et la phase. L&rsquo;amplitude est la force du signal de retour, influenc&eacute;e par les propri&eacute;t&eacute;s physiques de la surface. La distance aller-retour entre le satellite et le sol est mesur&eacute;e en unit&eacute;s de longueur d&rsquo;onde radar, et les changements de cette distance entre le moment o&ugrave; deux images radar ont &eacute;t&eacute; recueillies apparaissent comme une diff&eacute;rence de phase. La combinaison de ces deux images est appel&eacute;e &laquo;&nbsp;interf&eacute;rence&nbsp;&raquo; car la combinaison de deux ondes a pour effet de les renforcer ou de les annuler.<\/p>\n<p>InSAR &eacute;largit consid&eacute;rablement la capacit&eacute; des scientifiques &agrave; surveiller les volcans car, contrairement aux autres techniques qui reposent sur des mesures en quelques points, <strong>InSAR produit une carte de la <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;D&Eacute;FORMATION&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Changements &agrave; la surface d&amp;#039;un volcan qui se produisent en raison du mouvement du magma sous la surface. La plupart des d&eacute;formations volcaniques ne peuvent &ecirc;tre d&eacute;tect&eacute;es et mesur&eacute;es qu&amp;#039;&agrave; l&amp;#039;aide de techniques d&amp;#039;arpentage pr&eacute;cises telles qu&amp;#039;un syst&egrave;me de positionnement mondial (GPS), un tiltm&egrave;tre, un radar d&amp;#039;ouverture synth&eacute;tique interf&eacute;rom&eacute;trique (InSAR) ou un distancem&egrave;tre &eacute;lectronique (EDM).&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/deformation-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">d&eacute;formation<\/a> du sol qui couvre une tr&egrave;s grande zone spatiale<\/strong> avec une pr&eacute;cision centim&eacute;trique. Cette technique est particuli&egrave;rement utile pour les volcans &eacute;loign&eacute;s et difficiles &agrave; atteindre, ainsi que pour les endroits o&ugrave; des conditions dangereuses emp&ecirc;chent ou limitent la surveillance des volcans au sol.<\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-213fwaq-7ffc4a4a8a1d4a8168130f924a26c8da\">\n#top .hr.hr-invisible.av-213fwaq-7ffc4a4a8a1d4a8168130f924a26c8da{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-213fwaq-7ffc4a4a8a1d4a8168130f924a26c8da hr-invisible  avia-builder-el-13  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jj5682-678197d27f776c3f98b140a2da919f02\">\n.flex_column.av-jj5682-678197d27f776c3f98b140a2da919f02{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-jj5682-678197d27f776c3f98b140a2da919f02 av_two_fifth  avia-builder-el-14  el_after_av_three_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  \"><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtct05s-7abe90e3453e5426038009d942567e3c\">\n.avia-image-container.av-kqtct05s-7abe90e3453e5426038009d942567e3c img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-kqtct05s-7abe90e3453e5426038009d942567e3c .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<\/p><div class=\"avia-image-container av-kqtct05s-7abe90e3453e5426038009d942567e3c av-styling- avia-align-center  avia-builder-el-15  el_before_av_textblock  avia-builder-el-first \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-11643 avia-img-lazy-loading-not-11643 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/illustration-methodology-InSAR.jpg\" alt=\"\" title=\"illustration-methodology-InSAR\" height=\"332\" width=\"295\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/illustration-methodology-InSAR.jpg 295w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/illustration-methodology-InSAR-267x300.jpg 267w\" sizes=\"(max-width: 295px) 100vw, 295px\"\/><\/div><\/div><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtcts5h-57c1b66f9f33e5409181efa0a1e49220\">\n#top .av_textblock_section.av-kqtcts5h-57c1b66f9f33e5409181efa0a1e49220 .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section class=\"av_textblock_section av-kqtcts5h-57c1b66f9f33e5409181efa0a1e49220 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p><em>Un satellite passe au-dessus d&rsquo;une zone et enregistre des donn&eacute;es la concernant. Deux passages ou plus sont n&eacute;cessaires pour cr&eacute;er les images InSAR que nous utilisons pour examiner les changements de hauteur du sol. <\/em><\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mpxjnm-05fe96d43e6bb4872a43f0a4da0324e7\">\n#top .hr.hr-invisible.av-mpxjnm-05fe96d43e6bb4872a43f0a4da0324e7{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-mpxjnm-05fe96d43e6bb4872a43f0a4da0324e7 hr-invisible  avia-builder-el-17  el_after_av_textblock  el_before_av_image \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtd3ng6-ae8713d1bef18dac487acc9162a7cc32\">\n.avia-image-container.av-kqtd3ng6-ae8713d1bef18dac487acc9162a7cc32 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-kqtd3ng6-ae8713d1bef18dac487acc9162a7cc32 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div class=\"avia-image-container av-kqtd3ng6-ae8713d1bef18dac487acc9162a7cc32 av-styling- avia-align-center  avia-builder-el-18  el_after_av_hr  el_before_av_textblock \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-11647 avia-img-lazy-loading-not-11647 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring.jpg\" alt=\"\" title=\"Interferogram-image-InSAR-monitoring\" height=\"816\" width=\"1140\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring.jpg 1140w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring-300x215.jpg 300w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring-1030x737.jpg 1030w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring-768x550.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring-260x185.jpg 260w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Interferogram-image-InSAR-monitoring-705x505.jpg 705w\" sizes=\"(max-width: 1140px) 100vw, 1140px\"\/><\/div><\/div><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtd4eq5-8230bd2338f4e8701330dd1be29564ec\">\n#top .av_textblock_section.av-kqtd4eq5-8230bd2338f4e8701330dd1be29564ec .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section class=\"av_textblock_section av-kqtd4eq5-8230bd2338f4e8701330dd1be29564ec \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p><em>Image d&rsquo;interf&eacute;rogramme r&eacute;alis&eacute;e &agrave; partir de la surveillance InSAR, montrant le mod&egrave;le de soul&egrave;vement du sol de 1995-2001 centr&eacute; &agrave; 5 km (3 mi) &agrave; l&rsquo;ouest du volcan South Sister, Oregon.<\/em><\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ptmgqq-9afde2fd95e777e2efc6ca42e532eeea\">\n#top .hr.hr-invisible.av-ptmgqq-9afde2fd95e777e2efc6ca42e532eeea{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-ptmgqq-9afde2fd95e777e2efc6ca42e532eeea hr-invisible  avia-builder-el-20  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>While ground deformation data provides data at a small number of points on the surface, the radar interferometry method has become a real revolution.<\/p>\n","protected":false},"author":8,"featured_media":11142,"parent":11595,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-11640","page","type-page","status-publish","has-post-thumbnail","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"We prevent volcanic risks, through projects in different areas: Science, education and geo-conservation.\" \/>\n\t<meta name=\"robots\" content=\"max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/volcanofoundation.org\/fr\/renforcer-la-connaissance-des-risques\/monitoring\/deformation\/insar\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.0.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"fr_FR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"VOLCANO ACTIVE FOUNDATION\" \/>\n\t\t<meta 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