{"id":361,"date":"2026-09-30T09:46:55","date_gmt":"2026-09-30T09:46:55","guid":{"rendered":"https:\/\/satellitetvsoftware.com\/index.php\/2026\/09\/30\/eirp-explained-satellite-signal-strength-on-earth\/"},"modified":"2026-09-30T09:47:09","modified_gmt":"2026-09-30T09:47:09","slug":"eirp-explained-satellite-signal-strength-on-earth","status":"publish","type":"post","link":"https:\/\/satellitetvsoftware.com\/index.php\/2026\/09\/30\/eirp-explained-satellite-signal-strength-on-earth\/","title":{"rendered":"EIRP Explained: Satellite Signal Strength on Earth"},"content":{"rendered":"<p>EIRP sounds like jargon, but it is the single number that tells you how big a dish you need. Short for Effective Isotropic Radiated Power, it describes how strong the satellite&apos;s signal is where you live.<\/p>\n<h2>What EIRP Means<\/h2>\n<p>EIRP combines the satellite&apos;s transmit power and the size of its broadcast antenna into one effective number, measured in dBW. A higher EIRP means a stronger signal on the ground &mdash; and therefore a smaller dish.<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/satellitetvsoftware.com\/wp-content\/uploads\/2026\/09\/ly_ai_6abcda9a3ea4b6.32140034.jpg\" alt=\"EIRP Explained: Satellite Signal Strength on Earth\" \/><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/satellitetvsoftware.com\/wp-content\/uploads\/2026\/09\/ly_ai_6abcda9bdbd182.95957436.jpg\" alt=\"EIRP Explained: Satellite Signal Strength on Earth\" \/><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/satellitetvsoftware.com\/wp-content\/uploads\/2026\/09\/ly_ai_6abcda9d3d8dc1.42956797.jpg\" alt=\"EIRP Explained: Satellite Signal Strength on Earth\" \/><\/p>\n<h2>Why It Varies by Location<\/h2>\n<p>A satellite does not shine equally everywhere. Its broadcast antenna shapes the signal into a &ldquo;footprint&rdquo; that is strongest over its target region and weaker at the edges. EIRP maps that strength geographically.<\/p>\n<h2>Reading an EIRP Map<\/h2>\n<p>Satellite operators publish EIRP contour maps. The inner contour (highest EIRP) may need only a 45 cm dish; the outer contour may need 90 cm. If you live on the edge, plan for the larger dish.<\/p>\n<h2>How EIRP Drives Your Dish Size<\/h2>\n<ul>\n<li>High EIRP centre: 60 cm dish is plenty.<\/li>\n<li>Medium EIRP: 80 cm.<\/li>\n<li>Low EIRP edge: 90 cm or more.<\/li>\n<\/ul>\n<p>This is why two neighbours with the same satellite sometimes need different dishes &mdash; they are at different points on the footprint.<\/p>\n<h2>EIRP and Rain Margin<\/h2>\n<p>Even within a decent EIRP contour, you want a dish slightly bigger than the minimum. The extra size buys you rain fade margin that the raw EIRP number does not give you.<\/p>\n<h2>Where to Find It<\/h2>\n<p>Look up your target satellite on a satellite footprint map. The EIRP contours are usually marked in dBW. Compare your location to the contour lines.<\/p>\n<p>EIRP is the satellite&apos;s ground-level signal strength. Check it before you buy the dish &mdash; it tells you exactly what size you need.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>EIRP sounds like jargon, but it is the single number that tells you how big a dish you need. Short for Effective Isotropic Radiated Power, it describes how strong the satellite&apos;s signal is where you live. What EIRP Means EIRP combines the satellite&apos;s transmit power and the size of its broadcast antenna into one effective&#8230;<\/p>\n","protected":false},"author":1,"featured_media":362,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[7],"tags":[],"class_list":["post-361","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-satellite-technology-standards"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>EIRP Explained: Satellite Signal Strength on Earth - Satellite TV Guides<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/satellitetvsoftware.com\/index.php\/2026\/09\/30\/eirp-explained-satellite-signal-strength-on-earth\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"EIRP Explained: Satellite Signal Strength on Earth - Satellite TV Guides\" \/>\n<meta property=\"og:description\" content=\"EIRP sounds like jargon, but it is the single number that tells you how big a dish you need. 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