{"id":454,"date":"2013-08-21T07:50:00","date_gmt":"2013-08-21T05:50:00","guid":{"rendered":"https:\/\/kids.esa.int\/europe_s_space_sentinels\/"},"modified":"2026-10-08T00:28:23","modified_gmt":"2026-10-07T22:28:23","slug":"europe_s_space_sentinels","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/europe_s_space_sentinels\/","title":{"rendered":"Euroopan avaruussentinelit"},"content":{"rendered":"<div class=\"lede\">\n<p>Yli 30 vuoden kokemuksen perusteella maapallon havainnointisatelliittien lent\u00e4misest\u00e4 ESA kehitt\u00e4\u00e4 viitt\u00e4 uutta avaruusalustyyppi\u00e4, joita kutsutaan Sentinel-satelliiteiksi. Jokainen Sentinel-missio koostuu kahdesta identtisest\u00e4 satelliitista, jotta maapallon kattavuus olisi mahdollisimman laaja.<\/p>\n<\/div>\n<p>N\u00e4m\u00e4 taivaalla sijaitsevat havainnointilaitteet l\u00e4hett\u00e4v\u00e4t valtavia m\u00e4\u00e4ri\u00e4 tietoa maapallon pinnasta ja ilmakeh\u00e4st\u00e4. T\u00e4t\u00e4 tietoa hy\u00f6dynnet\u00e4\u00e4n Copernicus-ohjelman operatiivisiin tarpeisiin.<\/p>\n<p>Sentinel-1 on kaikkien s\u00e4\u00e4olosuhteiden ja vuorokaudenajan olosuhteiden mukainen tutkakuvausohjelma. Sen moniin teht\u00e4viin kuuluvat arktisen merij\u00e4\u00e4n seuranta, meren pilaantumisen (kuten \u00f6ljyvuotojen) tarkkailu, maaper\u00e4n liikkeiden kartoitus, metsien, veden ja maaper\u00e4n tutkiminen sek\u00e4 katastrofiapu. Polaarikiertoradalla liikkuva Sentinel-1A-satelliitti laukaistiin 3. huhtikuuta 2014. Sen kaksoissatelliitti, Sentinel-1B, laukaistiin kaksi vuotta my\u00f6hemmin, 25. huhtikuuta 2016.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"Astrium GmbH\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/02\/Sentinel-22\" 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\/2012\/02\/sentinel-22\/17878552-2-eng-GB\/Sentinel-2.jpg\" alt=\"Sentinel-2\"><figcaption>Sentinel-2<\/figcaption><\/figure>\n<p>Sentinel-2 on toinen polaarikiertoradalla liikkuva satelliittipari. Ne tuottavat yksityiskohtaisia optisia kuvia kasvillisuudesta, maaper\u00e4st\u00e4 ja vesipeitteest\u00e4 sek\u00e4 rannikkoalueista. Sentinel-2A laukaistiin 23. kes\u00e4kuuta 2015. Sentinel-2B laukaistiin 7. maaliskuuta 2017.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"ESA\u2013J. Huart\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/02\/Sentinel-32\" 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\/2012\/02\/sentinel-32\/17871448-2-eng-GB\/Sentinel-3.jpg\" alt=\"Sentinel-3\"><figcaption>Sentinel-3<\/figcaption><\/figure>\n<p>Sentinel-3:n useat mittauslaitteet mittaavat merenpinnan korkeutta, maa- ja merenpinnan l\u00e4mp\u00f6tilaa sek\u00e4 meren v\u00e4ri\u00e4 (joka johtuu pienist\u00e4 eli\u00f6ist\u00e4). Sentinel-3A laukaistiin onnistuneesti 16. helmikuuta 2016, ja Sentinel-3B:n laukaisu on suunniteltu vuodelle 2017.<\/p>\n<p>Sek\u00e4 Sentinel-4 ett\u00e4 Sentinel-5 seuraavat ilmanlaatua, otsonikerrosta, auringon s\u00e4teily\u00e4 ja ilmastonmuutosta. Sentinel-4 koostuu useista mittalaitteista, jotka on asennettu kahteen Meteosat Third Generation -s\u00e4\u00e4satelliittiin, jotka kiert\u00e4v\u00e4t maata p\u00e4iv\u00e4ntasaajan yl\u00e4puolella.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1280\" data-credit=\"ESA-P. Carril, 2012\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/11\/Sentinel-5_precursor2\" 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\/2012\/11\/sentinel-5_precursor2\/18245958-2-eng-GB\/Sentinel-5_precursor.jpg\" alt=\"Sentinel-5 precursor\"><figcaption>Sentinel-5-edelt\u00e4j\u00e4<\/figcaption><\/figure>\n<p>Sentinel-5-mittalaitteet asennetaan polaarikiertoradalla liikkuvaan MetOp Second Generation (MSG) -satelliittiin, joka lent\u00e4\u00e4 huomattavasti matalammalla korkeudella kuin Sentinel-4.<\/p>","protected":false},"excerpt":{"rendered":"<p>Based on over 30 years of experience in flying Earth observation satellites, ESA is developing five new types of spacecraft, known as Sentinels. Each Sentinel mission is made up of [&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\/2007\/05\/sentinel-12\/17892760-2-eng-GB\/Sentinel-1.jpg","esa_banner_description":"Sentinel-1","esa_banner_credit":"ESA\/P. 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