{"id":993,"date":"2007-03-13T10:41:00","date_gmt":"2007-03-13T09:41:00","guid":{"rendered":"https:\/\/kids.esa.int\/arctic_explorers_support_esa_s_cryosat\/"},"modified":"2026-10-08T00:34:37","modified_gmt":"2026-10-07T22:34:37","slug":"arctic_explorers_support_esa_s_cryosat","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/arctic_explorers_support_esa_s_cryosat\/","title":{"rendered":"Arktisten alueiden tutkimusmatkailijat tukevat ESA:n CryoSat-satelliittia"},"content":{"rendered":"
\n

18 kuukautta sitten tutkijat olivat ep\u00e4toivoissaan, kun satelliitti, jonka oli tarkoitus l\u00e4hett\u00e4\u00e4 t\u00e4rkeit\u00e4 tietoja ilmastonmuutoksesta, menetettiin laukaisun ep\u00e4onnistumisen seurauksena. ESA p\u00e4\u00e4tti kuitenkin nopeasti rakentaa CryoSat-satelliitin uudelleen, ja projekti on nyt hyv\u00e4ll\u00e4 mallilla. Itse asiassa, kun CryoSat-2 laukaistaan vuonna 2009, se on jopa edelt\u00e4j\u00e4\u00e4ns\u00e4 suorituskykyisempi.<\/p>\n<\/div>\n

CryoSat-2:n suuri etu on sen kyky mitata j\u00e4\u00e4peitteen paksuuden muutoksia sek\u00e4 maalla ett\u00e4 merell\u00e4. Sen p\u00e4\u00e4radarilaite ja identtinen varalaite pystyv\u00e4t tutkimaan maapallon j\u00e4\u00e4peitteit\u00e4 ja j\u00e4\u00e4tik\u00f6it\u00e4 kaikissa s\u00e4\u00e4olosuhteissa, p\u00e4iv\u00e4ll\u00e4 tai y\u00f6ll\u00e4.<\/p>\n

\"The
Kaksi Arctic Arc -tutkimusmatkailijaa, Alain Hubert (vasemmalla) ja Dixie Dansercoer<\/figcaption><\/figure>\n

Laukaisun valmistelemiseksi arktisella alueella on k\u00e4ynnistym\u00e4ss\u00e4 useita kentt\u00e4kokeita. Yksi niist\u00e4 on Arctic Arc -retkikunta, joka on osa Kansainv\u00e4list\u00e4 polaarikautta. Retkikunnan kaksi belgialaista tutkimusmatkailijaa, Alain Hubert ja Dixie Dansercoer, ovat juuri l\u00e4hteneet vaativalle 110 p\u00e4iv\u00e4n vaellukselle j\u00e4\u00e4tyneen er\u00e4maan halki.<\/p>\n

Kumpikin vet\u00e4\u00e4 130 kg:n painoista kelkkaa, jossa on tarvikkeita ja varusteita, ja n\u00e4m\u00e4 kaksi rohkeaa tutkimusmatkailijaa \u2018k\u00e4velev\u00e4t\u2019 maailman katon yli Siperian saarelta Etel\u00e4-Gr\u00f6nlantiin. Matkan varrella he kirjaavat huolellisesti lumensyvyyden. T\u00e4llaiset mittaukset ovat eritt\u00e4in hy\u00f6dyllisi\u00e4, kun tarkistetaan menetelm\u00e4\u00e4, jolla CryoSat-satelliitin tutkamittaukset muunnetaan tarkkoiksi j\u00e4\u00e4paksuustiedoiksi.<\/p>\n

Tutkijat l\u00e4htev\u00e4t my\u00f6s huhtikuun puoliv\u00e4liss\u00e4 Svalbardin j\u00e4\u00e4peitteisille saarille. Heid\u00e4n tekem\u00e4ns\u00e4 lumi- ja j\u00e4\u00e4mittaukset verrataan tietoihin, jotka l\u00e4hetet\u00e4\u00e4n lentokoneesta, jossa on mukana CryoSat-satelliitin tutkalaitteen kopio.<\/p>","protected":false},"excerpt":{"rendered":"

18 months ago, scientists were in despair when a satellite that would send back vital data about climate change was lost during a launch failure. However, ESA quickly decided to […]<\/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\/2005\/07\/cryosat13\/17882289-2-eng-GB\/CryoSat.jpg","esa_banner_description":"CryoSat","esa_banner_credit":"ESA - AOES Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2005\/07\/CryoSat13","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":[42,10,66],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-993","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-water-world"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=993"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/993\/revisions"}],"predecessor-version":[{"id":4784,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/993\/revisions\/4784"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=993"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=993"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=993"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=993"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=993"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=993"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=993"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}