{"id":1847,"date":"2024-07-02T10:47:51","date_gmt":"2024-07-02T08:47:51","guid":{"rendered":"https:\/\/www.fresnel.fr\/wp\/?post_type=hipe&p=1847"},"modified":"2025-01-06T17:10:00","modified_gmt":"2025-01-06T16:10:00","slug":"characterisation-of-the-near-subsoil","status":"publish","type":"hipe","link":"https:\/\/www.fresnel.fr\/wp\/en\/hipe\/themes\/characterisation-of-the-near-subsoil\/","title":{"rendered":"Characterisation of the near subsoil"},"content":{"rendered":"

\"\"Nous nous int\u00e9ressons \u00e0 l\u2019imagerie du proche sous-sol de milieux potentiellement absorbants. Les exp\u00e9rimentations sont conduites en utilisant le scanner plan de l\u2019IF<\/a>\u00a0et les ph\u00e9nom\u00e8nes \u00e9lectromagn\u00e9tiques sont mod\u00e9lis\u00e9s gr\u00e2ce \u00e0 un code \u00e9l\u00e9ments finis d\u00e9velopp\u00e9 en interne (Voir ici<\/a>).<\/p>\n

Les \u00e9tudes men\u00e9es autour des radars de sol, ont permis de mettre au point des proc\u00e9dures de traitement des mesures\u00a0[1]<\/a>\u00a0et de calibration prenant en compte la mod\u00e9lisation du rayonnement des antennes\u00a0[2]<\/a>.<\/p>\n

L\u2019importance d\u2019une mod\u00e9lisation pr\u00e9cise du champ excitateur a ainsi \u00e9t\u00e9 montr\u00e9e et l\u2019int\u00e9r\u00eat de la prise en compte du digramme de rayonnement des antennes lors de l\u2019inversion quantitative a permis une am\u00e9lioration substantielle des cartes de permittivit\u00e9 reconstruites dans le cas d\u2019une configuration en transmission\u00a0[3]<\/a>.<\/p>\n

Ces \u00e9tudes ont mis en \u00e9vidence qu\u2019il \u00e9tait ainsi possible d\u2019imager des cibles faiblement enfouies dans un milieu \u00e0 pertes\u00a0[4]<\/a>.<\/p>\n

 <\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

Contact\u00a0:\u00a0<\/strong>Christelle Eyraud
\nMots-cl\u00e9s\u00a0:<\/strong>\u00a0Objets enfouis, Proche sous-sol, Humidit\u00e9, GPR, Milieux complexes, Multistatique, Milieux \u00e0 pertes<\/p>\n","protected":false},"author":10,"featured_media":2034,"parent":1726,"menu_order":20,"template":"","thematique":[31],"class_list":{"0":"post-1847","1":"hipe","2":"type-hipe","3":"status-publish","4":"has-post-thumbnail","6":"entry"},"acf":[],"lang":"en","translations":{"en":1847,"fr":762},"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/hipe\/1847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/hipe"}],"about":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/types\/hipe"}],"author":[{"embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/users\/10"}],"version-history":[{"count":1,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/hipe\/1847\/revisions"}],"predecessor-version":[{"id":2638,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/hipe\/1847\/revisions\/2638"}],"up":[{"embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/hipe\/1726"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/media\/2034"}],"wp:attachment":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/media?parent=1847"}],"wp:term":[{"taxonomy":"thematique","embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/thematique?post=1847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}