{"id":614,"date":"2012-10-17T11:12:00","date_gmt":"2012-10-17T09:12:00","guid":{"rendered":"https:\/\/kids.esa.int\/four_galileo_pathfinders_now_in_orbit\/"},"modified":"2026-10-08T00:30:18","modified_gmt":"2026-10-07T22:30:18","slug":"four_galileo_pathfinders_now_in_orbit","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/four_galileo_pathfinders_now_in_orbit\/","title":{"rendered":"Nelj\u00e4 Galileo-edell\u00e4k\u00e4vij\u00e4\u00e4 on nyt kiertoradalla"},"content":{"rendered":"
\n

12. lokakuuta Sojuz-raketti laukaistiin Ranskan Guayanassa sijaitsevalta Kouroun avaruuskeskuksesta mukanaan kaksi Galileo-satelliittia. Euroopan maailmanlaajuisen satelliittinavigointij\u00e4rjestelm\u00e4n kolmas ja nelj\u00e4s satelliitti liittyiv\u00e4t kahden satelliitin joukkoon, jotka oli laukaistu l\u00e4hes tarkalleen vuosi aiemmin. N\u00e4m\u00e4 kaksi uutta satelliittia t\u00e4ydent\u00e4v\u00e4t Galileo-ohjelman \u2018testiryhm\u00e4n\u2019.<\/p>\n<\/div>\n

VS03-lennon n\u00e4ytt\u00e4v\u00e4 laukaisu alkoi klo 20.15 CEST. Kaikki raketin vaiheet sujuivat suunnitelmien mukaisesti, ja yl\u00e4vaihe vapautti satelliitit kiertoradalleen noin 23 200 km:n korkeudessa 3 tuntia 45 minuuttia laukaisun j\u00e4lkeen.<\/p>\n

Galileo-satelliittipari kuljetettiin vierekk\u00e4in ja vapautettiin sitten vastakkaisiin suuntiin oikealla kiertoradalle siirtymiskohdassa. Alustavien tarkastusten j\u00e4lkeen ne luovutetaan Saksan ja Italian valvontakeskuksiin testattaviksi ennen toiminnan aloittamista.<\/p>\n

\"Four
Nelj\u00e4 Galileo-satelliittia<\/figcaption><\/figure>\n

Nyt kun kiertoradalla on nelj\u00e4 identtist\u00e4 satelliittia, ESA pystyy osoittamaan Galileo-j\u00e4rjestelm\u00e4n suorituskyvyn ennen j\u00e4ljell\u00e4 olevien satelliittien laukaisua. N\u00e4m\u00e4 nelj\u00e4 satelliittia muodostavat yhdess\u00e4 v\u00e4himm\u00e4ism\u00e4\u00e4r\u00e4n, joka tarvitaan sijainnin m\u00e4\u00e4ritt\u00e4miseen maapallolla.<\/p>\n

N\u00e4m\u00e4 Pathfinder-avaruusalukset valmistavat tiet\u00e4 Galileo-satelliittij\u00e4rjestelm\u00e4n t\u00e4ysimittaiselle k\u00e4ytt\u00f6\u00f6notolle. Vuoden 2014 loppuun menness\u00e4 on tarkoitus laukaista viel\u00e4 18 satelliittia, mink\u00e4 j\u00e4lkeen navigointipalvelut voidaan k\u00e4ynnist\u00e4\u00e4 koko Euroopassa. Lopulta Galileo-j\u00e4rjestelm\u00e4\u00e4n kuuluu 30 satelliittia, jotka kiert\u00e4v\u00e4t kolmella eri kiertoradalla.<\/p>","protected":false},"excerpt":{"rendered":"

On 12 October, a Soyuz rocket lifted off from the Kourou spaceport in French Guiana with two Galileo spacecraft. The third and fourth satellites of Europe\u2019s global navigation satellite system […]<\/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\/2012\/10\/soyuz_vs03_liftoff18\/18246550-2-eng-GB\/Soyuz_VS03_liftoff.jpg","esa_banner_description":"Soyuz VS03 liftoff","esa_banner_credit":"ESA\u2013S. Corvaja, 2012","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/10\/Soyuz_VS03_liftoff18","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":[10,54,40],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-614","post","type-post","status-publish","format-standard","hentry","category-learn","category-space-technologies-on-earth","category-technology"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/614","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=614"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/614\/revisions"}],"predecessor-version":[{"id":4583,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/614\/revisions\/4583"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=614"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=614"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=614"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=614"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=614"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=614"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=614"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}