{"version":"1.0","provider_name":"Pr\u016fvodce divo\u010dinou","provider_url":"https:\/\/www.chovanec.com\/wp","author_name":"ludd","author_url":"https:\/\/www.chovanec.com\/wp\/author\/ludd\/","title":"Astronavigace na sou\u0161i bez um\u011bl\u00e9ho horizontu - Pr\u016fvodce divo\u010dinou","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\"><a href=\"https:\/\/www.chovanec.com\/wp\/astronavigace-na-sousi-bez-umeleho-horizontu\/\">Astronavigace na sou\u0161i bez um\u011bl\u00e9ho horizontu<\/a><\/blockquote>\n<script type='text\/javascript'>\n<!--\/\/--><![CDATA[\/\/><!--\n\t\t\/*! This file is auto-generated *\/\n\t\t!function(c,d){\"use strict\";var e=!1,n=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},!c.wp.receiveEmbedMessage)if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var r,a,i,s=d.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),n=d.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),o=0;o<n.length;o++)n[o].style.display=\"none\";for(o=0;o<s.length;o++)if(r=s[o],e.source===r.contentWindow){if(r.removeAttribute(\"style\"),\"height\"===t.message){if(1e3<(i=parseInt(t.value,10)))i=1e3;else if(~~i<200)i=200;r.height=i}if(\"link\"===t.message)if(a=d.createElement(\"a\"),i=d.createElement(\"a\"),a.href=r.getAttribute(\"src\"),i.href=t.value,i.host===a.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener(\"message\",c.wp.receiveEmbedMessage,!1),d.addEventListener(\"DOMContentLoaded\",t,!1),c.addEventListener(\"load\",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf(\"MSIE 10\"),a=!!navigator.userAgent.match(\/Trident.*rv:11\\.\/),i=d.querySelectorAll(\"iframe.wp-embedded-content\"),s=0;s<i.length;s++){if(!(e=i[s]).getAttribute(\"data-secret\"))t=Math.random().toString(36).substr(2,10),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t);if(r||a)(t=e.cloneNode(!0)).removeAttribute(\"security\"),e.parentNode.replaceChild(t,e)}}}}(window,document);\n\/\/--><!]]>\n<\/script><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.chovanec.com\/wp\/astronavigace-na-sousi-bez-umeleho-horizontu\/embed\/\" width=\"600\" height=\"338\" title=\"&#8222;Astronavigace na sou\u0161i bez um\u011bl\u00e9ho horizontu&#8220; &#8212; Pr\u016fvodce divo\u010dinou\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe>","thumbnail_url":"https:\/\/www.chovanec.com\/wp\/wp-content\/uploads\/2023\/09\/IMG_20210427_154242.jpg","thumbnail_width":1200,"thumbnail_height":900,"description":"Z\u00e1kladem v\u011bt\u0161iny astronaviga\u010dn\u00edch metod je m\u011b\u0159en\u00ed \u00fahlov\u00e9 v\u00fd\u0161ky Slunce (nebo jin\u00e9ho nebesk\u00e9ho t\u011blesa) nad obzorem. Obzorem (horizontem) se p\u0159itom mysl\u00ed te\u010dn\u00e1 rovina k povrchu Zem\u011b na m\u00edst\u011b, kde se nach\u00e1z\u00edme. Pokud se nach\u00e1z\u00edme na otev\u0159en\u00e9m mo\u0159i, pova\u017eujeme za aproximaci te\u010dn\u00e9 roviny vodn\u00ed hladinu kolem n\u00e1s. Pro danou v\u00fd\u0161ku na\u0161eho oka nad hladinou jsme schopni celkem [&hellip;]"}