{"id":839,"date":"2004-12-02T15:26:00","date_gmt":"2004-12-02T14:26:00","guid":{"rendered":"https:\/\/kids.esa.int\/countdown\/"},"modified":"2026-10-08T00:32:51","modified_gmt":"2026-10-07T22:32:51","slug":"countdown","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/countdown\/","title":{"rendered":"L\u00e4ht\u00f6laskenta"},"content":{"rendered":"
\n

Ariane-5-laukaisukampanja kest\u00e4\u00e4 yleens\u00e4 noin viisi viikkoa. Alkuvaiheessa ty\u00f6ryhm\u00e4t valmistelevat ja tarkastavat raketin ja satelliitit. Vaikka ty\u00f6n suorittavat eri ty\u00f6ryhm\u00e4t, kampanja on j\u00e4rjestetty niin, ett\u00e4 kaikki on valmiina ajoissa.<\/p>\n<\/div>\n

Kaksitoista p\u00e4iv\u00e4\u00e4 ennen laukaisua aloitetaan satelliittien kiinnitt\u00e4minen kantoraketin k\u00e4rkeen. T\u00e4m\u00e4 tapahtuu lopullisen kokoonpanon rakennuksessa.<\/p>\n

P\u00e4iv\u00e4 ennen laukaisua Ariane 5 kuljetetaan rautateitse laukaisualustalle. Kun siirrett\u00e4v\u00e4 laukaisualusta on kytketty laukaisualustaan, alkaa lopullinen l\u00e4ht\u00f6laskenta.<\/p>\n

P\u00e4\u00e4polttoaines\u00e4ili\u00f6t on t\u00e4ytetty, laukaisulaitteen alij\u00e4rjestelm\u00e4t on tarkastettu ja lento-ohjelma on ladattu tietokoneeseen. Lopuksi, kun aikaa on j\u00e4ljell\u00e4 \u20136 minuuttia 30 sekuntia, l\u00e4ht\u00f6laskenta siirtyy automaattitilaan.<\/p>\n

\u201c10, 9, 8, \u2026\u201d. Operaatiojohtaja laskee l\u00e4ht\u00f6laskennan loppuun Jupiterin ohjauskeskuksen turvalasin takaa, 12 km:n p\u00e4\u00e4ss\u00e4 laukaisualustasta.<\/p>\n

\u201c\u2026 3, 2, 1, d\u00e9collage\u201d. Moottorit syttyv\u00e4t ja kantoraketti nousee ilmaan. Automaattiohjauksella lent\u00e4v\u00e4\u00e4 Ariane 5:t\u00e4 seurataan tarkasti, kun se suuntaa it\u00e4\u00e4n tai pohjoiseen meren yli.<\/p>\n

Nelj\u00e4kymment\u00e4 minuuttia my\u00f6hemmin saapuu uutinen, ett\u00e4 avaruusalukset on saatettu kiertoradalle. Teht\u00e4v\u00e4 suoritettu.<\/p>","protected":false},"excerpt":{"rendered":"

An Ariane-5 launch campaign usually lasts about five weeks. During the early stages, the teams prepare and check the rocket and the satellites. Although the work is done by different […]<\/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\/2001\/11\/countdown_to_launch2\/17863307-3-eng-GB\/Countdown_to_launch.gif","esa_banner_description":"Countdown to launch","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2001\/11\/Countdown_to_launch2","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":[10,41,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-839","post","type-post","status-publish","format-standard","hentry","category-learn","category-rockets-technology","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\/839","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=839"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/839\/revisions"}],"predecessor-version":[{"id":1982,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/839\/revisions\/1982"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=839"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=839"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=839"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=839"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=839"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=839"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=839"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}