{"id":508,"date":"2016-02-08T09:21:00","date_gmt":"2016-02-08T08:21:00","guid":{"rendered":"https:\/\/kids.esa.int\/sentinel-3_getting_ready_to_watch_over_earth\/"},"modified":"2026-10-08T00:29:01","modified_gmt":"2026-10-07T22:29:01","slug":"sentinel-3_getting_ready_to_watch_over_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/sentinel-3_getting_ready_to_watch_over_earth\/","title":{"rendered":"Sentinel-3 valmistautuu valvomaan Maata"},"content":{"rendered":"<div class=\"lede\">\n<p>16. helmikuuta ESA:n Sentinel-3-niminen satelliitti laukaistaan kiertoradalle Maan ymp\u00e4rille! Sentinel-3 on uusin lis\u00e4ys edistyneiden satelliittien joukkoon, joiden teht\u00e4v\u00e4n\u00e4 on tutkia maapallomme maata, meri\u00e4 ja ilmakeh\u00e4\u00e4.<\/p>\n<\/div>\n<p>Sentinel-3-satelliitin painopisteen\u00e4 ovat meret. Meret kattavat 70% maapallosta, ja niiden seuranta antaa meille mahdollisuuden arvioida, kuinka hyv\u00e4ss\u00e4 kunnossa maapallo on. Meriss\u00e4 tapahtuvat muutokset vaikuttavat meihin kaikkiin riippumatta siit\u00e4, miss\u00e4 asumme. Maapallon vesi on t\u00e4rke\u00e4 luonnonvara, jota meid\u00e4n on suojeltava.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1280\" data-credit=\"ESA\u2013Pierre Carril\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2016\/02\/Sentinel-3\" 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\/2016\/02\/sentinel-3\/17887876-2-eng-GB\/Sentinel-3.jpg\" alt=\"Sentinel-3\"><figcaption>Sentinel-3<\/figcaption><\/figure>\n<p>Sentinel-3 kiert\u00e4\u00e4 maapallon yl\u00e4puolella yli 800 km:n korkeudessa \u2013 se on viel\u00e4 kauempana maasta kuin kansainv\u00e4linen avaruusasema, joka kiert\u00e4\u00e4 maapalloa noin 400 km:n korkeudessa. T\u00e4st\u00e4 n\u00e4k\u00f6alapaikasta satelliitti mittaa merenpinnan l\u00e4mp\u00f6tilaa, v\u00e4ri\u00e4 ja korkeutta sek\u00e4 merij\u00e4\u00e4n paksuutta. N\u00e4m\u00e4 mittaukset ovat eritt\u00e4in t\u00e4rkeit\u00e4, sill\u00e4 niiden avulla voimme seurata merenpinnan tason muutoksia, saasteiden m\u00e4\u00e4r\u00e4\u00e4 ja meren eli\u00f6st\u00f6n terveytt\u00e4.<\/p>\n<p>Kun Sentinel-3 ei tarkkaile merta, se auttaa sisarsatelliittiaan Sentinel-2:ta tarkkailemalla maapallon maa-alueita. Se mittaa j\u00e4rvien ja jokien vedenkorkeuksia ja seuraa jopa vaarallisia mets\u00e4paloja.<\/p>\n<p>Kiertoradalla on jo kaksi Sentinel-satelliittia, ja Sentinel-3:n j\u00e4lkeen on suunniteltu viel\u00e4 nelj\u00e4 lis\u00e4\u00e4. Kukin satelliitti on toiminnassa v\u00e4hint\u00e4\u00e4n seitsem\u00e4n vuotta. Hankkeen tutkijat toivovat kuitenkin, ett\u00e4 ne toimisivat viel\u00e4 pidemp\u00e4\u00e4nkin, ja ovat varustaneet satelliitit riitt\u00e4v\u00e4ll\u00e4 polttoaineella, jotta ne pystyv\u00e4t toimimaan jatkuvassa k\u00e4yt\u00f6ss\u00e4 jopa 12 vuotta!<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Raketti, joka vie Sentinel-3:n kiertoradalle, on muokattu SS-19-mantereidenv\u00e4linen ballistinen ohjus. Se suunniteltiin alun perin sotilasaseeksi, mutta se on muunnettu rauhanomaisiin tarkoituksiin. T\u00e4m\u00e4 sopii erinomaisesti Sentinel-3:n teht\u00e4v\u00e4\u00e4n suojella Maata!<\/p>","protected":false},"excerpt":{"rendered":"<p>On 16 February an ESA satellite called Sentinel-3 will blast up into orbit around Earth! Sentinel-3 is the latest in a fleet of advanced satellites whose mission is to study [&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\/2016\/02\/mapping_growth\/17911417-2-eng-GB\/Mapping_growth.jpg","esa_banner_description":"Sentinel-3 will monitor Earth\u2019s oceans and create maps to show how healthy sea life is","esa_banner_credit":"ACRI-ST\/CNES\/ESA\/GeoEye\/NASA\/VITO","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2016\/02\/Mapping_growth","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-508","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\/fi\/wp-json\/wp\/v2\/posts\/508","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=508"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/508\/revisions"}],"predecessor-version":[{"id":4520,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/508\/revisions\/4520"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=508"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=508"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=508"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=508"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=508"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=508"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=508"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}