{"id":805,"date":"2011-07-05T08:12:00","date_gmt":"2011-07-05T06:12:00","guid":{"rendered":"https:\/\/kids.esa.int\/communications\/"},"modified":"2026-10-08T00:32:27","modified_gmt":"2026-10-07T22:32:27","slug":"communications","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/communications\/","title":{"rendered":"Side"},"content":{"rendered":"
\n

1960. aastate teleseriaali f\u00e4nnid Star Trek<\/i> olid h\u00e4mmastunud, kui n\u00e4gid, kuidas kapten Kirk avas v\u00e4ikese k\u00e4eshoitava telefoni, et r\u00e4\u00e4kida oma t\u00e4helaeva meeskonnaga. T\u00e4nap\u00e4eval ei ole mobiiltelefonid enam ulme. Kuhu iganes Maal ka ei l\u00e4heks, alates polaaraladest kuni ookeani keskele, on v\u00f5imalik telefoniga \u00fchendust pidada. Uusimate mudelitega on v\u00f5imalik ka e-kirju saata ja internetis otsida.<\/p>\n<\/div>\n

See sidealane revolutsioon on saanud v\u00f5imalikuks t\u00e4nu satelliittehnoloogia kasutuselev\u00f5tule. Kuni 1960. aastate keskpaigani edastati telefonik\u00f5nesid maismaal asuvate raadioside\u00fchenduste ja kaablite kaudu. Siiski oli edastatavate k\u00f5nede arv piiratud.<\/p>\n

Siis ilmusid esimesed sidesatelliidid. Geostatsionaarsel orbiidil, umbes 36 000 km k\u00f5rgusel ekvaatori kohal tiirlevad satelliidid suutsid t\u00f6\u00f6tada ilma kuluka saatjate ja kaablite v\u00f5rgustikuta. Nad suutsid h\u00f5lpsasti \u00fchendada helistajaid ookeani v\u00f5i m\u00e4estiku m\u00f5lemal poolel. 1965. aastal orbiidile saadetud \u201eEarly Bird\u201c suutis korraga teenindada 240 telefonik\u00f5net. T\u00e4nap\u00e4eval suudab suur sidesatelliit teenindada sadu tuhandeid telefonik\u00f5nesid.<\/p>\n

Viimastel aastatel on toimunud veel \u00fcks revolutsioon \u2013 madalale v\u00f5i keskmisele Maa orbiidile on viidud v\u00e4ikeste satelliitide laevastikud. Kuna neid lendab erinevatel trajektooridel k\u00fcmneid, on horisondi kohal alati mitu satelliiti, mis v\u00f5tavad vastu mobiilseadmetelt tulevad k\u00f5ned. Iga k\u00f5ne saadetakse seej\u00e4rel maapinnal asuvasse \u2018v\u00e4ravajaama\u2019, mis edastab selle vastuv\u00f5tjale. Neid satelliite kasutatakse ka isikliku asukoha j\u00e4lgimiseks, s\u00f5numite saatmiseks ja h\u00e4daolukordades asukoha kindlaksm\u00e4\u00e4ramiseks.<\/p>","protected":false},"excerpt":{"rendered":"

Fans of the 1960s TV series Star Trek were amazed when they saw Captain Kirk flip open a tiny hand-help phone to speak to the crew of his starship. Today, […]<\/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\/2010\/10\/hylas-1_serving_europe2\/17876924-2-eng-GB\/Hylas-1_serving_Europe.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/10\/Hylas-1_serving_Europe2","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-805","post","type-post","status-publish","format-standard","hentry","category-learn","category-space-technologies-on-earth","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/comments?post=805"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/805\/revisions"}],"predecessor-version":[{"id":1948,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/805\/revisions\/1948"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=805"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=805"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=805"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=805"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=805"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=805"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=805"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}