{"id":1112,"date":"2022-08-29T18:38:42","date_gmt":"2022-08-29T16:38:42","guid":{"rendered":"https:\/\/turid.se\/?p=1112"},"modified":"2023-10-13T16:55:46","modified_gmt":"2023-10-13T14:55:46","slug":"sun_altitude","status":"publish","type":"post","link":"https:\/\/turid.se\/sv\/2022\/08\/29\/sun_altitude\/","title":{"rendered":"Sextanten"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Jakob:<\/p>\n<\/blockquote>\n\n\n\n<p>Himlakropparnas r\u00f6relser har intresserat mig sedan jag var barn; jag \u00e4gnade m\u00e5nga timmar i ton\u00e5ren \u00e5t att skapa formler f\u00f6r ber\u00e4kning av bl.a. solens upp- och nedg\u00e5ng. <\/p>\n\n\n\n<p>Detta i kombination med b\u00e5tar och segling gjorde mig naturligtvis ocks\u00e5 intresserad av astronomisk navigation \u00e4ven om det h\u00f6ll sig p\u00e5 det teoretiska planet. En <a href=\"https:\/\/sv.wikipedia.org\/wiki\/Sextant\" target=\"_blank\" rel=\"noreferrer noopener\">sextant<\/a> var utom r\u00e4ckh\u00e5ll f\u00f6r mig som ton\u00e5ring p\u00e5 1970-talet.<\/p>\n\n\n\n<p>Men nu \u00e4r l\u00e4get ett annat. Jag har ropat in en sextant till bra pris p\u00e5 auktion, en n\u00e4rmast oanv\u00e4nd \u00f6sttysk Freiberger fr\u00e5n 1979. Den kom med posten idag och att beh\u00e4rska den ska bli h\u00f6sten projekt. <\/p>\n\n\n\n<p>En sextant \u00e4r allts\u00e5 ett instrument f\u00f6r att m\u00e4ta hur h\u00f6gt solen eller en annan himlakropp st\u00e5r p\u00e5 himlen. Med hj\u00e4lp av h\u00f6jden \u00f6ver horisonten och klockslaget p\u00e5 n\u00e5gon sekund n\u00e4r kan positionen ber\u00e4knas. Den som \u00e4r duktig kan komma ner p\u00e5 en noggrannhet av n\u00e5gon distansminut, allts\u00e5 ett par kilometer, vilket \u00e4r mer \u00e4n tillr\u00e4ckligt f\u00f6r den som \u00e4r ute p\u00e5 v\u00e4rldshaven.<\/p>\n\n\n\n<p>De teoretiska grunderna har jag klart f\u00f6r mig men det g\u00e4ller att kunna m\u00e4ta med precision. Speciellt sv\u00e5rt \u00e4r det p\u00e5 ett fartyg i r\u00f6relse. Jag skall rapportera hur det g\u00e5r.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-1024x1024.jpg\" alt=\"\" class=\"wp-image-1113\" srcset=\"https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-1024x1024.jpg 1024w, https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-300x300.jpg 300w, https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-150x150.jpg 150w, https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-768x768.jpg 768w, https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-1536x1536.jpg 1536w, https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-2048x2048.jpg 2048w, https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/sextant-1568x1568.jpg 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Jakob: Himlakropparnas r\u00f6relser har intresserat mig sedan jag var barn; jag \u00e4gnade m\u00e5nga timmar i ton\u00e5ren \u00e5t att skapa formler f\u00f6r ber\u00e4kning av bl.a. solens upp- och nedg\u00e5ng. Detta i kombination med b\u00e5tar och segling gjorde mig naturligtvis ocks\u00e5 intresserad av astronomisk navigation \u00e4ven om det h\u00f6ll sig p\u00e5 det teoretiska planet. En sextant var&hellip; <a class=\"more-link\" href=\"https:\/\/turid.se\/sv\/2022\/08\/29\/sun_altitude\/\">Forts\u00e4tt l\u00e4sa <span class=\"screen-reader-text\">Sextanten<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":1119,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[31,9],"tags":[20],"class_list":["post-1112","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bat","category-turid-ii","tag-navigation","entry"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204.jpg","jetpack_sharing_enabled":true,"rttpg_featured_image_url":{"full":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204.jpg",2339,2339,false],"landscape":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204.jpg",2339,2339,false],"portraits":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204.jpg",2339,2339,false],"thumbnail":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204-150x150.jpg",150,150,true],"medium":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204-300x300.jpg",300,300,true],"large":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204-1024x1024.jpg",1000,1000,true],"1536x1536":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204-1536x1536.jpg",1536,1536,true],"2048x2048":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204-2048x2048.jpg",2048,2048,true],"trp-custom-language-flag":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204.jpg",12,12,false],"post-thumbnail":["https:\/\/turid.se\/wp-content\/uploads\/2022\/08\/20220829_181204-1568x1568.jpg",1568,1568,true]},"rttpg_author":{"display_name":"Jakob Norstedt","author_link":"https:\/\/turid.se\/sv\/author\/jakob\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/turid.se\/sv\/kat\/bat\/\" rel=\"category tag\">B\u00e5t<\/a> <a href=\"https:\/\/turid.se\/sv\/kat\/bat\/turid-ii\/\" rel=\"category tag\">Turid II<\/a>","rttpg_excerpt":"Jakob: Himlakropparnas r\u00f6relser har intresserat mig sedan jag var barn; jag \u00e4gnade m\u00e5nga timmar i ton\u00e5ren \u00e5t att skapa formler f\u00f6r ber\u00e4kning av bl.a. solens upp- och nedg\u00e5ng. Detta i kombination med b\u00e5tar och segling gjorde mig naturligtvis ocks\u00e5 intresserad av astronomisk navigation \u00e4ven om det h\u00f6ll sig p\u00e5 det teoretiska planet. En sextant var&hellip;&hellip;","_links":{"self":[{"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/posts\/1112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/comments?post=1112"}],"version-history":[{"count":2,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/posts\/1112\/revisions"}],"predecessor-version":[{"id":1214,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/posts\/1112\/revisions\/1214"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/media\/1119"}],"wp:attachment":[{"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/media?parent=1112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/categories?post=1112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/turid.se\/sv\/wp-json\/wp\/v2\/tags?post=1112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}