{"id":284,"date":"2009-05-20T09:38:17","date_gmt":"2009-05-20T07:38:17","guid":{"rendered":"http:\/\/vandiepenbeeck.org\/?p=284"},"modified":"2009-05-20T09:38:17","modified_gmt":"2009-05-20T07:38:17","slug":"images-remarquables-20","status":"publish","type":"post","link":"http:\/\/vandiepenbeeck.org\/?p=284","title":{"rendered":"Images remarquables"},"content":{"rendered":"<p><!--[if !mso]> \n\n<style> v:* {behavior:url(#default#VML);} o:* {behavior:url(#default#VML);} w:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} <\/style>\n\n <![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal<\/w:View> <w:Zoom>0<\/w:Zoom> <w:PunctuationKerning \/> <w:ValidateAgainstSchemas \/> <w:SaveIfXMLInvalid>false<\/w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false<\/w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false<\/w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables \/> <w:SnapToGridInCell \/> <w:WrapTextWithPunct \/> <w:UseAsianBreakRules \/> <w:DontGrowAutofit \/> <\/w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4<\/w:BrowserLevel> <\/w:WordDocument> <\/xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState=\"false\" LatentStyleCount=\"156\"> <\/w:LatentStyles> <\/xml><![endif]-->  <!--[if gte mso 10]> \n\n<style>  \/* Style Definitions *\/  table.MsoNormalTable         {mso-style-name:\"Table Normal\";         mso-tstyle-rowband-size:0;         mso-tstyle-colband-size:0;         mso-style-noshow:yes;         mso-style-parent:\"\";         mso-padding-alt:0in 5.4pt 0in 5.4pt;         mso-para-margin:0in;         mso-para-margin-bottom:.0001pt;         mso-pagination:widow-orphan;         font-size:10.0pt;         font-family:\"Times New Roman\";         mso-ansi-language:#0400;         mso-fareast-language:#0400;         mso-bidi-language:#0400;} <\/style>\n\n <![endif]--><\/p>\n<h2><span lang=\"FR\" xml:lang=\"FR\">Parasites sur une image radar<\/span><\/h2>\n<p class=\"MsoNormal\"><span lang=\"FR\" xml:lang=\"FR\"><!--[if gte vml 1]><v:shapetype id=\"_x0000_t75\"  coordsize=\"21600,21600\" o:spt=\"75\" o:preferrelative=\"t\" path=\"m@4@5l@4@11@9@11@9@5xe\"  filled=\"f\" stroked=\"f\"> <v:stroke joinstyle=\"miter\" \/> <v:formulas> <v:f eqn=\"if lineDrawn pixelLineWidth 0\" \/> <v:f eqn=\"sum @0 1 0\" \/> <v:f eqn=\"sum 0 0 @1\" \/> <v:f eqn=\"prod @2 1 2\" \/> <v:f eqn=\"prod @3 21600 pixelWidth\" \/> <v:f eqn=\"prod @3 21600 pixelHeight\" \/> <v:f eqn=\"sum @0 0 1\" \/> <v:f eqn=\"prod @6 1 2\" \/> <v:f eqn=\"prod @7 21600 pixelWidth\" \/> <v:f eqn=\"sum @8 21600 0\" \/> <v:f eqn=\"prod @7 21600 pixelHeight\" \/> <v:f eqn=\"sum @10 21600 0\" \/> <\/v:formulas> <v:path o:extrusionok=\"f\" gradientshapeok=\"t\" o:connecttype=\"rect\" \/> <o:lock v:ext=\"edit\" aspectratio=\"t\" \/> <\/v:shapetype><v:shape id=\"_x0000_i1025\" type=\"#_x0000_t75\" style='width:470.25pt;  height:381pt'> <v:imagedata src=\"file:\/\/\/C:DOCUME~1mvdpbLOCALS~1Tempmsohtml11clip_image001.png\"   o:title=\"\" \/> <\/v:shape><![endif]--><!--[if !vml]--><!--[endif]--><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"FR\" xml:lang=\"FR\"><a href=\"http:\/\/lameteo.blogs.lalibre.be\/media\/02\/00\/1206388816.gif\" target=\"_blank\"><img decoding=\"async\" src=\"http:\/\/lameteo.blogs.lalibre.be\/media\/02\/00\/1995164758.gif\" id=\"media-53944\" alt=\"20090519035005.wideumont.radar.pcr.rmi_240_pix512.gif\" style=\"border-width: 0; float: left; margin: 0.2em 1.4em 0.7em 0;\" name=\"media-53944\" \/><\/a>L\u2019image radar montre parfois une ligne droite comme s\u2019il y avait une ligne de pluie. Ici la ligne est observ\u00e9e sur l\u2019image du radar de Wideumont d<\/span><span lang=\"FR\" xml:lang=\"FR\">u&nbsp; 19 mai \u00e0 3 h 50 (temps universel)<\/span> <span lang=\"FR\" xml:lang=\"FR\">et est orient\u00e9e pratiquement vers le Nord-Est.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"FR\" xml:lang=\"FR\">Cette image est prise un peu apr\u00e8s le lever du Soleil et le parasite se produit exactement dans la direction du lever du Soleil. C\u2019est pr\u00e9cis\u00e9ment le Soleil qui provoque ce parasite sur l\u2019image radar en \u00e9mettant un peu d&rsquo;\u00e9nergie dans la bande fr\u00e9quence du radar (5GHz). Il existe bien un syst\u00e8me de filtrage des \u00e9chos parasites mais il n&rsquo;est pas du tout efficace pour \u00e9liminer le signal provenant du soleil.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"FR\" xml:lang=\"FR\">L&rsquo;image radar peut \u00e9galement \u00eatre perturb\u00e9e par des obstacles fixes comme les montagnes ou les constructions au voisinage imm\u00e9diat de l&rsquo;antenne. C\u2019est pourquoi lors de la recherche d\u2019un site pour l\u2019implantation d\u2019un radar, on tient compte de l\u2019environnement pour avoir le moins de perturbation dans les signaux de l\u2019appareil. Ces parasites fixes peuvent \u00e9galement \u00eatre filtr\u00e9s et retir\u00e9s de l\u2019image.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Parasites sur une image radar L\u2019image radar montre parfois une ligne droite comme s\u2019il y avait une ligne de pluie. Ici la ligne est observ\u00e9e sur l\u2019image du radar de Wideumont du&nbsp; 19 mai \u00e0 3 h 50 (temps universel) et est orient\u00e9e pratiquement vers le Nord-Est. Cette image est prise un peu apr\u00e8s le [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-284","post","type-post","status-publish","format-standard","hentry","category-meteo"],"_links":{"self":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/posts\/284"}],"collection":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=284"}],"version-history":[{"count":0,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=\/wp\/v2\/posts\/284\/revisions"}],"wp:attachment":[{"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=284"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/vandiepenbeeck.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}