{"id":624,"date":"2013-09-19T09:25:00","date_gmt":"2013-09-19T07:25:00","guid":{"rendered":"https:\/\/kids.esa.int\/re-entry_nears_for_esa_s_ferrari_of_space\/"},"modified":"2026-10-08T00:30:24","modified_gmt":"2026-10-07T22:30:24","slug":"re-entry_nears_for_esa_s_ferrari_of_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/re-entry_nears_for_esa_s_ferrari_of_space\/","title":{"rendered":"\u00c5terintr\u00e4det n\u00e4rmar sig f\u00f6r ESA:s \u2018rymdens Ferrari\u2019"},"content":{"rendered":"
\n

Efter mer \u00e4n fyra \u00e5r i omloppsbana n\u00e4rmar sig ESA:s GOCE-uppdrag sitt slut. I mitten av oktober kommer satelliten att ha slut p\u00e5 br\u00e4nsle och dess omloppsbana kommer att b\u00f6rja avta. \u00c5terintr\u00e4det i atmosf\u00e4ren f\u00f6rv\u00e4ntas ske ungef\u00e4r tre veckor senare.<\/p>\n<\/div>\n

GOCE har kretsat kring jorden sedan mars 2009 p\u00e5 en h\u00f6jd av mindre \u00e4n 270 km, vilket \u00e4r ovanligt l\u00e5gt f\u00f6r en forskningssatellit. Dess uppgift har varit att med o\u00f6vertr\u00e4ffad precision kartl\u00e4gga de sm\u00e5 variationerna i jordytans gravitation.<\/p>\n

Gravitationen \u00e4r den kraft som drar allt mot marken. Jordens gravitationskraft varierar dock n\u00e5got fr\u00e5n plats till plats. Detta beror delvis p\u00e5 att planeten inte \u00e4r helt rund \u2013 den \u00e4r n\u00e5got tillplattad vid polerna. Gravitationen p\u00e5verkas ocks\u00e5 av h\u00f6ga berg och djupa havsgravar, liksom av tjockleken och densiteten hos hav och bergarter.<\/p>\n

\"New
Ny GOCE-geoid<\/figcaption><\/figure>\n

N\u00e4r GOCE passerar \u00f6ver omr\u00e5den med olika gravitationskraft r\u00f6r sig rymdfarkosten upp och ner, och dess instrument registrerar dessa f\u00f6r\u00e4ndringar i dess bana. S\u00e5dana exakta m\u00e4tningar har m\u00f6jliggjorts tack vare dess l\u00e5ga omloppsbana och den str\u00f6mlinjeformade, aerodynamiska konstruktionen, vilket har gett den smeknamnet \u2018rymdens Ferrari\u2019. Den unika satelliten \u00e4r dessutom extremt stabil, utan n\u00e5gra av de r\u00f6rliga delar som ofta anv\u00e4nds p\u00e5 andra rymdfarkoster.<\/p>\n

Data fr\u00e5n GOCE har anv\u00e4nts f\u00f6r att studera havsstr\u00f6mmar, f\u00f6r\u00e4ndringar i havsniv\u00e5n, landytans h\u00f6jd och den skiktade strukturen hos jordens bergartsskorpa. Den har till och med uppt\u00e4ckt vindar i rymden och ljudv\u00e5gor som r\u00f6rde sig upp\u00e5t genom atmosf\u00e4ren efter den kraftiga jordb\u00e4vningen som drabbade Japan den 11 mars 2011. Det kanske viktigaste resultatet har varit en anm\u00e4rkningsv\u00e4rt exakt modell (kallad \u2018geoiden\u2019) av jordens gravitation. Geoiden visar hur jorden skulle se ut om gravitationen var lika \u00f6verallt p\u00e5 dess yta, s\u00e5 att vatten inte skulle str\u00f6mma fr\u00e5n en punkt till en annan.<\/p>","protected":false},"excerpt":{"rendered":"

After more than four years in orbit, ESA\u2019s GOCE mission is nearing its end. In mid-October, the satellite will run out of fuel and its orbit will begin to decay. […]<\/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\/2008\/03\/goce_in_orbit4\/18246217-2-eng-GB\/GOCE_in_orbit.jpg","esa_banner_description":"GOCE in orbit","esa_banner_credit":"ESA\/AOES Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/03\/GOCE_in_orbit4","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-624","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/624","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=624"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/624\/revisions"}],"predecessor-version":[{"id":4591,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/624\/revisions\/4591"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=624"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=624"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=624"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=624"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=624"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=624"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=624"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}