{"id":552,"date":"2014-02-12T09:43:00","date_gmt":"2014-02-12T08:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/galileo_satellites_get_the_green_light\/"},"modified":"2026-10-08T00:29:33","modified_gmt":"2026-10-07T22:29:33","slug":"galileo_satellites_get_the_green_light","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/galileo_satellites_get_the_green_light\/","title":{"rendered":"Galileo-satelliiteille annettiin vihre\u00e4 valo"},"content":{"rendered":"
\n

Eurooppa odottaa luottavaisin mielin maailman ensimm\u00e4isen siviilik\u00e4ytt\u00f6\u00f6n tarkoitetun satelliittinavigointij\u00e4rjestelm\u00e4n k\u00e4ytt\u00f6\u00f6nottoa, nyt kun nelj\u00e4 ensimm\u00e4ist\u00e4 Galileo-satelliittia l\u00e4p\u00e4isiv\u00e4t testins\u00e4 erinomaisin tuloksin.<\/p>\n<\/div>\n

Galileo-nelikko laukaistiin vuosina 2011 ja 2012 sen osoittamiseksi, ett\u00e4 monimutkainen j\u00e4rjestelm\u00e4 toimi lupausten mukaisesti. Syyn\u00e4 nelj\u00e4n satelliitin laukaisemiseen oli se, ett\u00e4 se on v\u00e4himm\u00e4ism\u00e4\u00e4r\u00e4 satelliitteja, joita tarvitaan paikkojen tarkkaan paikantamiseen maapallolla. Siit\u00e4 l\u00e4htien j\u00e4rjestelm\u00e4\u00e4 on testattu, jotta voitaisiin osoittaa, ett\u00e4 se toimii suunnitellusti.<\/p>\n

12. maaliskuuta 2013 satelliitit suorittivat ensimm\u00e4isen historiallisen maanp\u00e4\u00e4llisen sijainnin m\u00e4\u00e4ritt\u00e4misen. Seuraavien kuukausien aikana l\u00e4hetettiin lukuisia muita navigointiviestej\u00e4 koko Galileo-j\u00e4rjestelm\u00e4n perusteellisen testauksen yhteydess\u00e4.<\/p>\n

Kaikki t\u00e4m\u00e4 kova ty\u00f6 on osoittanut, ett\u00e4 Galileo toimii eritt\u00e4in hyvin. Vain nelj\u00e4ll\u00e4 satelliitilla se on pystynyt m\u00e4\u00e4ritt\u00e4m\u00e4\u00e4n sijainnit 8 metrin tarkkuudella vaakasuunnassa ja 9 metrin tarkkuudella pystysuunnassa. Sen keskim\u00e4\u00e4r\u00e4inen aikatarkkuus on 10 miljardisosaa sekunnista, ja suurin osa h\u00e4t\u00e4signaaleista on paikannettu nopeasti 2 kilometrin tarkkuudella. Suorituskyky paranee entisest\u00e4\u00e4n, kun koko Galileo-j\u00e4rjestelm\u00e4 otetaan k\u00e4ytt\u00f6\u00f6n.<\/p>\n

Eurooppa odottaa nyt innolla j\u00e4ljell\u00e4 olevien satelliittien laukaisua ja uusien maa-asemien k\u00e4ytt\u00f6\u00f6nottoa. Vuoden 2014 aikana nykyisten nelj\u00e4n satelliitin joukkoon on tarkoitus lis\u00e4t\u00e4 kuusi uutta satelliittia, jotta Galileon operatiiviset palvelut voidaan k\u00e4ynnist\u00e4\u00e4 vuoden loppuun menness\u00e4!<\/p>","protected":false},"excerpt":{"rendered":"

Europe is confidently looking forward to having the world’s first non-military satellite navigation system, now that the first four Galileo satellites passed their tests with flying colours. The Galileo quartet […]<\/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\/2014\/02\/four-satellite_galileo_constellation2\/17875148-2-eng-GB\/Four-satellite_Galileo_constellation.jpg","esa_banner_description":"Four-satellite Galileo constellation","esa_banner_credit":"ESA - P. Carril","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/02\/Four-satellite_Galileo_constellation2","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-552","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\/552","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=552"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/552\/revisions"}],"predecessor-version":[{"id":1695,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/552\/revisions\/1695"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=552"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=552"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=552"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=552"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=552"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=552"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=552"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}