{"id":536,"date":"2015-06-09T09:11:00","date_gmt":"2015-06-09T07:11:00","guid":{"rendered":"https:\/\/kids.esa.int\/sentinel_satellites_to_stand_watch_over_earth\/"},"modified":"2026-10-08T00:29:21","modified_gmt":"2026-10-07T22:29:21","slug":"sentinel_satellites_to_stand_watch_over_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/sentinel_satellites_to_stand_watch_over_earth\/","title":{"rendered":"Sentinel-satelliitit valvovat maapalloa"},"content":{"rendered":"<div class=\"lede\">\n<p>On uskomatonta ajatella, ett\u00e4 vaikka kirkas sininen taivas n\u00e4ytt\u00e4\u00e4kin aivan tyhj\u00e4lt\u00e4 aurinkoisena p\u00e4iv\u00e4n\u00e4, planeettamme ymp\u00e4rill\u00e4 lent\u00e4\u00e4 itse asiassa tuhansia suuria metallisia satelliitteja!<\/p>\n<\/div>\n<p>N\u00e4m\u00e4 n\u00e4kym\u00e4tt\u00f6m\u00e4t ty\u00f6ntekij\u00e4t hoitavat kaikenlaisia t\u00e4rkeit\u00e4 teht\u00e4vi\u00e4: ne auttavat meit\u00e4 pysym\u00e4\u00e4n yhteydess\u00e4 perheisiimme ja yst\u00e4viimme ja auttavat meit\u00e4 ymm\u00e4rt\u00e4m\u00e4\u00e4n planeettaamme paremmin.<\/p>\n<p>Yksi satelliittijoukko tunnetaan nimell\u00e4 Sentinels. Sentinel tarkoittaa vartijaa tai sotilasta, jonka teht\u00e4v\u00e4n\u00e4 on pit\u00e4\u00e4 vahtia ja huolehtia turvallisuudestamme. Ja juuri sit\u00e4 Sentinel-satelliitit tekev\u00e4tkin!<\/p>\n<p>Yhteisty\u00f6ss\u00e4 ne tutkivat kotoplaneettamme merist\u00e4 taivaalle. Niiden l\u00e4hett\u00e4m\u00e4t tiedot auttavat meit\u00e4 ratkaisemaan kaikenlaisia ymp\u00e4rist\u00f6ongelmia, niin luonnollisia kuin ihmisen aiheuttamiakin.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1280\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2015\/06\/Colour_vision_for_Sentinel-2\" 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\/2015\/06\/colour_vision_for_sentinel-2\/17904824-2-eng-GB\/Colour_vision_for_Sentinel-2.jpg\" alt=\"Colour vision for Sentinel-2\"><figcaption>Sentinel-2:n v\u00e4rin\u00e4k\u00f6<\/figcaption><\/figure>\n<p>Sentinel-perhe kasvaa edelleen. Ensimm\u00e4inen satelliitti laukaistiin viime vuonna, ja my\u00f6hemmin t\u00e4ss\u00e4 kuussa perheeseen liittyy uusi j\u00e4sen, Sentinel-2A. T\u00e4m\u00e4 satelliitti on osa Sentinel-2-nimist\u00e4 satelliittiparia. Ensimm\u00e4inen satelliitti laukaistaan kiertoradalle 23. kes\u00e4kuuta, ja toinen satelliitti, Sentinel-2B, liittyy sen seuraan ensi vuonna.<\/p>\n<p>Sentinel-2:ssa on eritt\u00e4in tehokas kamera, joka antaa satelliittij\u00e4rjestelm\u00e4lle v\u00e4rin\u00e4\u00f6n. N\u00e4m\u00e4 kaksi satelliittia tutkivat yhdess\u00e4 kasvillisuutta ja vett\u00e4 maapallon pinnalla. Ker\u00e4ttyjen tietojen avulla voimme parantaa maataloutta, jotta voimme tuottaa enemm\u00e4n ruokaa, ja selvitt\u00e4\u00e4, mik\u00e4 vesi on juomakelpoista.<\/p>\n<p>Sentinel-2 seuraa my\u00f6s kutistuvia metsi\u00e4mme ja kasvavia kaupunkejamme. Sen avulla voimme selvitt\u00e4\u00e4, miss\u00e4 tautien puhkeaminen on todenn\u00e4k\u00f6ist\u00e4, tai ohjata ihmisi\u00e4 turvallisiin paikkoihin h\u00e4t\u00e4tilanteissa. T\u00e4m\u00e4 auttaa meit\u00e4 suojelemaan arvokkaan maailmamme maata ja ihmisi\u00e4.<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Sentinel-2A kiert\u00e4\u00e4 maata kaksi kertaa korkeammalla kuin kansainv\u00e4linen avaruusasema!<\/p>","protected":false},"excerpt":{"rendered":"<p>It\u2019s incredible to think that despite how empty the clear blue sky looks on a sunny day, there are actually thousands of big, metal satellites flying around our planet! These [&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\/2015\/04\/sentinel-2\/17894499-2-eng-GB\/Sentinel-2.jpg","esa_banner_description":"Sentinel-2","esa_banner_credit":"ESA\/ATG medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2015\/04\/Sentinel-2","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-536","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\/536","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=536"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/536\/revisions"}],"predecessor-version":[{"id":4536,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/536\/revisions\/4536"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=536"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=536"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=536"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=536"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=536"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=536"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=536"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}