{"id":808,"date":"2004-12-03T09:58:00","date_gmt":"2004-12-03T08:58:00","guid":{"rendered":"https:\/\/kids.esa.int\/weather_studies_from_space\/"},"modified":"2026-10-08T00:32:29","modified_gmt":"2026-10-07T22:32:29","slug":"weather_studies_from_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/weather_studies_from_space\/","title":{"rendered":"S\u00e4\u00e4havainnot avaruudesta"},"content":{"rendered":"
\n

Haluatko tiet\u00e4\u00e4, sataako piknikill\u00e4si vai onko p\u00e4iv\u00e4retkell\u00e4si aurinkoista? Nyky\u00e4\u00e4n sen voi helposti selvitt\u00e4\u00e4 katsomalla satelliittikuvia televisiosta tai internetist\u00e4.<\/p>\n<\/div>\n

Viel\u00e4 muutama vuosikymmen sitten s\u00e4\u00e4ennusteet olivat paljon ep\u00e4tarkempia. Yksi ongelmista oli se, ett\u00e4 s\u00e4\u00e4asemia oli perustettu vain muutamiin paikkoihin. Kaikkialla muualla s\u00e4\u00e4olosuhteet olivat l\u00e4hes mysteeri.<\/p>\n

Nyky\u00e4\u00e4n satelliitit kattavat koko maapallon. Jokainen pilvij\u00e4rjestelm\u00e4 ja myrsky voidaan seurata niiden muodostumisen ja muutosten aikana.<\/p>\n

Ensimm\u00e4inen s\u00e4\u00e4satelliitti, TIROS (Television and InfraRed Observation Satellite), laukaistiin 1. huhtikuuta 1960. Siin\u00e4 oli kaksi televisiokameraa, jotka l\u00e4hettiv\u00e4t rakeisia kuvia takaisin maan pinnalle.<\/p>\n

Nykyiset s\u00e4\u00e4satelliitit ovat suurempia ja huomattavasti kehittyneempi\u00e4. Ne tarjoavat s\u00e4\u00e4ennustajille eritt\u00e4in tarkkoja kuvia ja muuta hy\u00f6dyllist\u00e4 tietoa ilmakeh\u00e4st\u00e4 ja merist\u00e4, mink\u00e4 avulla he voivat tarkentaa ennusteitaan. Jotkut s\u00e4\u00e4satelliitit kiert\u00e4v\u00e4t aina saman alueen yl\u00e4puolella maapallon pinnalla. Ne pysyv\u00e4t geostationaarisilla kiertoradoilla, 36 000 km:n korkeudella p\u00e4iv\u00e4ntasaajan yl\u00e4puolella.<\/p>\n

Toiset kiert\u00e4v\u00e4t maapallon pohjoisnavalta etel\u00e4navalle ja takaisin. Ne liikkuvat paljon l\u00e4hemp\u00e4n\u00e4 maanpintaa (jotkut jopa 800 km:n korkeudella) ja tuottavat eritt\u00e4in tarkkoja l\u00e4hikuvia s\u00e4\u00e4ilmi\u00f6ist\u00e4 ymp\u00e4ri maailmaa.<\/p>","protected":false},"excerpt":{"rendered":"

Do you want to know whether it will rain on your picnic or be sunny for your day trip? Nowadays, it is easy to find out by looking at satellite […]<\/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\/2004\/12\/raining2\/17907087-2-eng-GB\/raining.jpg","esa_banner_description":"","esa_banner_credit":"AP Photo\/David Zalubowsky","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/raining2","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":[10,44,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-808","post","type-post","status-publish","format-standard","hentry","category-learn","category-spacecraft","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/808","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=808"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/808\/revisions"}],"predecessor-version":[{"id":1951,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/808\/revisions\/1951"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=808"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=808"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=808"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=808"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=808"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=808"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=808"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}