{"id":803,"date":"2011-07-05T08:28:00","date_gmt":"2011-07-05T06:28:00","guid":{"rendered":"https:\/\/kids.esa.int\/satellite_television\/"},"modified":"2026-10-08T00:32:26","modified_gmt":"2026-10-07T22:32:26","slug":"satellite_television","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/satellite_television\/","title":{"rendered":"Satellit-tv"},"content":{"rendered":"
\n

Idag tar vi det f\u00f6r givet att vi kan se direkts\u00e4nda TV-bilder fr\u00e5n evenemang som fotbolls-VM eller OS. Dessa bilder har ofta f\u00e4rdats till din sk\u00e4rm fr\u00e5n andra sidan jordklotet.<\/p>\n<\/div>\n

Det som g\u00f6r detta m\u00f6jligt \u00e4r en ring av kommunikationssatelliter i geostation\u00e4r bana. Dessa satelliter, som kretsar cirka 36 000 km ovanf\u00f6r ekvatorn, verkar sv\u00e4va \u00f6ver samma del av jordytan. De tar emot TV-signaler fr\u00e5n paraboler p\u00e5 marken och f\u00f6rst\u00e4rker dem sedan. Satelliten s\u00e4nder sedan vidare bilderna och ljudet tillbaka till tittarna.<\/p>\n

Den moderna eran f\u00f6r satellit-TV inleddes i juli 1962, d\u00e5 Telstar 1 s\u00e4nde de f\u00f6rsta direkts\u00e4nda TV-programmen fr\u00e5n USA till Storbritannien. \u00c5r 1965 blev Early Bird den f\u00f6rsta satelliten som anv\u00e4ndes f\u00f6r regelbundna TV-s\u00e4ndningar mellan Nordamerika och Europa.<\/p>\n

F\u00f6rr i tiden m\u00e5ste TV-signalerna s\u00e4ndas till stora parabolantenner vid s\u00e4rskilda markstationer innan de s\u00e4ndes vidare till lokala antenner. Idag \u00e4r satellitsignalerna s\u00e5 kraftfulla att de kan tas emot av sm\u00e5 paraboler p\u00e5 taket till kontor och bost\u00e4der. Denna digital-TV som s\u00e4nds direkt till hush\u00e5llen har blivit mycket popul\u00e4r i m\u00e5nga l\u00e4nder.<\/p>\n

Man kan ocks\u00e5 uppr\u00e4tta direkts\u00e4ndningar via satellit mellan avl\u00e4gsna kontor, eller mellan l\u00e4kare p\u00e5 stadssjukhus och patienter i avl\u00e4gsna byar p\u00e5 landsbygden. Satelliter anv\u00e4nds \u00e4ven f\u00f6r digitala radios\u00e4ndningar, som kan tas emot av bilar och b\u00e4rbara radioapparater.<\/p>","protected":false},"excerpt":{"rendered":"

Today, we take it for granted that we can see live TV pictures of events such as the World Cup or the Olympic Games. These pictures have often travelled to […]<\/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\/2008\/11\/satellite_control_software_expertise_simplifies_digital_tv_channel_broadcasting2\/17878107-2-eng-GB\/Satellite_control_software_expertise_simplifies_digital_TV_channel_broadcasting.jpg","esa_banner_description":"","esa_banner_credit":"AFP","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2008\/11\/Satellite_control_software_expertise_simplifies_digital_TV_channel_broadcasting2","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":[10,65,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-803","post","type-post","status-publish","format-standard","hentry","category-learn","category-mission-control","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=803"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/803\/revisions"}],"predecessor-version":[{"id":1946,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/803\/revisions\/1946"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=803"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=803"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=803"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=803"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=803"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=803"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=803"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}