{"id":852,"date":"2004-12-03T10:51:00","date_gmt":"2004-12-03T09:51:00","guid":{"rendered":"https:\/\/kids.esa.int\/satellite_navigation\/"},"modified":"2026-10-08T00:33:00","modified_gmt":"2026-10-07T22:33:00","slug":"satellite_navigation","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/satellite_navigation\/","title":{"rendered":"Satellitnavigation"},"content":{"rendered":"
\n

For l\u00e6nge siden fandt de, der sejlede p\u00e5 havet, vej ved at studere solens, m\u00e5nens og stjernernes positioner. Senere, omkring \u00e5r 1300, gjorde indf\u00f8relsen af kompasset livet lidt lettere for disse s\u00f8farere.<\/p>\n<\/div>\n

I dag har rumteknologien gjort det umuligt for nogen at fare vild. Enhver person, bil, skib eller fly, der er udstyret med et satellitnavigationssystem, kan bestemme sin position med en n\u00f8jagtighed p\u00e5 15 til 20 meter.<\/p>\n

Satellitnavigation bygger p\u00e5, at en modtager beregner sin position ved hj\u00e6lp af signaler, der udsendes af mindst fire satellitter.<\/p>\n

\"GPS\"
GPS<\/figcaption><\/figure>\n

Det system, vi i dag bruger i hverdagen, blev oprindeligt udviklet af milit\u00e6re \u00e5rsager. Mellem 1960 og 1968 opsendte det amerikanske milit\u00e6r 23 navigationssatellitter for at underst\u00f8tte navigationen af Polaris-ub\u00e5de.<\/p>\n

Disse udviklede sig efterh\u00e5nden til Global Positioning System (GPS). Et lignende system, kaldet Glonass, blev indf\u00f8rt af det russiske milit\u00e6r. Begge systemer er nu tilg\u00e6ngelige til b\u00e5de civil og milit\u00e6r brug. Derfor \u00f8nskede Europa at have sit eget p\u00e5lidelige system.<\/p>\n

Europa har nu indf\u00f8rt et system kaldet EGNOS, som forbedrer GPS-systemets n\u00f8jagtighed. ESA og Det Europ\u00e6iske F\u00e6llesskab arbejder desuden sammen om at udvikle Europas eget civile (ikke-milit\u00e6re) navigationssystem. Systemet, der kaldes Galileo, bliver det f\u00f8rste fuldst\u00e6ndigt civile system til global navigation.<\/p>","protected":false},"excerpt":{"rendered":"

Long ago, people who sailed the sea found their way by studying the positions of the Sun, Moon and stars. Then, around 1300, the introduction of the compass made life […]<\/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\/2001\/01\/galileo2\/17866193-3-eng-GB\/Galileo.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2001\/01\/Galileo2","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":[10,54,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-852","post","type-post","status-publish","format-standard","hentry","category-learn","category-space-technologies-on-earth","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/852","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=852"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":4707,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/852\/revisions\/4707"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=852"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=852"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=852"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=852"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=852"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=852"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=852"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}