{"id":1123,"date":"2004-12-03T10:13:00","date_gmt":"2004-12-03T09:13:00","guid":{"rendered":"https:\/\/kids.esa.int\/how_do_we_observe_the_earth\/"},"modified":"2026-10-08T00:36:15","modified_gmt":"2026-10-07T22:36:15","slug":"how_do_we_observe_the_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/how_do_we_observe_the_earth\/","title":{"rendered":"Hvordan observerer vi Jorden?"},"content":{"rendered":"<div class=\"lede\">\n<p>I mange \u00e5rhundreder var den eneste m\u00e5de at f\u00e5 et godt overblik over et stort omr\u00e5de p\u00e5 at klatre op p\u00e5 h\u00f8jere grund. Derefter gjorde opfindelsen af balloner og fly jordobservation meget nemmere.<\/p>\n<\/div>\n<p>I rumalderen er satellitter i stigende grad blevet brugt til at unders\u00f8ge alle aspekter af vores planet.<\/p>\n<p>Da de observerer Jorden fra stor afstand, kaldes de ofte for \u201cfjernm\u00e5lingssatellitter\u201d.<\/p>\n<p>De mest detaljerede billeder af Jordens overflade og atmosf\u00e6re sendes tilbage af satellitter i lave kredsl\u00f8b, der f\u00f8rer dem over Nord- og Sydpolen.<\/p>\n<p>Mens Jorden drejer under dem, kan disse satellitter tage billeder af hele planeten \u2013 stribe for stribe \u2013 med et par dages mellemrum.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"3072\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2000\/10\/Envisat_artist_s_impression3\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2000\/10\/envisat_artist_s_impression3\/17866231-3-eng-GB\/Envisat_artist_s_impression.jpg\" alt=\"Envisat, artist&#x27;s impression\"><figcaption>Envisat, kunstnerisk fremstilling<\/figcaption><\/figure>\n<p>Satellitter i pol\u00e6re baner unders\u00f8ger is- og sned\u00e6kke, arealanvendelse, luft- og vandforurening samt det lokale vejr. ESA\u2019s satellitter i pol\u00e6re baner er den europ\u00e6iske fjernm\u00e5lingssatellit (ERS-2) og milj\u00f8satellitten Envisat.<\/p>\n<p>Andre rumfart\u00f8jer holder konstant \u00f8je med den samme del af Jorden, mens de kredser 36.000 km over \u00e6kvator. Det giver dem et bredere udsyn, men det betyder ogs\u00e5, at de ikke kan se Jorden i s\u00e5 stor detalje.<\/p>\n<p>Europa har indtil videre sendt otte vejrsatellitter, kaldet Meteosat, op i denne type \u201cgeostation\u00e6r\u201d bane.<\/p>","protected":false},"excerpt":{"rendered":"<p>For many centuries, the only way to obtain a good view of a large area was to climb to higher ground. Then the invention of balloons and aircraft made Earth [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/07\/the_world_seen_by_envisat_s_meris2\/17870967-2-eng-GB\/The_world_seen_by_Envisat_s_MERIS.jpg","esa_banner_description":"The world seen by Envisat 's MERIS","esa_banner_credit":"ESA 2004","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/07\/The_world_seen_by_Envisat_s_MERIS2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[42,10,59],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1123","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-natural-disasters","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1123","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=1123"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1123\/revisions"}],"predecessor-version":[{"id":4859,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1123\/revisions\/4859"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1123"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1123"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1123"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1123"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1123"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1123"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1123"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}