{"id":4849,"date":"2012-11-19T12:41:54","date_gmt":"2012-11-19T12:41:54","guid":{"rendered":"http:\/\/dev.rsgbtestzone.biz\/wordpress\/?page_id=4849"},"modified":"2026-05-14T12:15:33","modified_gmt":"2026-05-14T11:15:33","slug":"hf-propagation","status":"publish","type":"page","link":"https:\/\/rsgb.org\/main\/technical\/propagation\/hf-propagation\/","title":{"rendered":"HF Propagation"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-4850\" src=\"https:\/\/rsgb.org\/main\/files\/2012\/11\/propagation_hf-propagation-paths.png\" alt=\"\" width=\"193\" height=\"142\" srcset=\"https:\/\/rsgb.org\/main\/files\/2012\/11\/propagation_hf-propagation-paths.png 193w, https:\/\/rsgb.org\/main\/files\/2012\/11\/propagation_hf-propagation-paths-150x110.png 150w\" sizes=\"auto, (max-width: 193px) 100vw, 193px\" \/><\/p>\n<p><strong>The links below provide information about High Frequency propagation<\/strong><\/p>\n<p>Please note the RSGB is not responsible for the content of external websites.<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><a href=\"http:\/\/www.infotechcomms.co.uk\/Understanding_LF_and_HF_propagation.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Understanding LF and HF Propagation<\/a> (16-page\/724KB PDF) by G3NYK and G0KYA<\/li>\n<li><a href=\"http:\/\/www.earth-prints.org\/bitstream\/2122\/820\/1\/15Warrington.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Propagation of Radio Waves over northerly paths (Uppsala-Leicester)<\/a> (17-page\/2.8MB PDF) by E.M. Warrington and others<\/li>\n<li><a href=\"http:\/\/www.swpc.noaa.gov\/products\/d-region-absorption-predictions-d-rap\" target=\"_blank\" rel=\"noopener noreferrer\">D-Region Absorption<\/a><\/li>\n<\/ul>\n<ul>\n<li><a href=\"http:\/\/aa7a.net\/aa7a_propagation_tools_page.htm\" target=\"_blank\" rel=\"noopener noreferrer\">AA7A&#8217;s Propagation Tools Page<\/a><\/li>\n<li>G0KYA&#8217;s &#8211; making sense of <a title=\"10m Propagation\" href=\"http:\/\/www.g0kya.blogspot.co.uk\/2009\/10\/making-sense-of-10m-propagation.html\" target=\"_blank\" rel=\"noopener noreferrer\">10m propagation<\/a>.<\/li>\n<li>Understanding ionospheric sounding and <a title=\"Digisondes\" href=\"http:\/\/g0kya.blogspot.co.uk\/2011\/02\/ionospheric-sounding-and-digisondes.html\" target=\"_blank\" rel=\"noopener noreferrer\">digisondes<\/a><\/li>\n<li>Free <a title=\"E-Books\" href=\"http:\/\/www.g0kya.blogspot.co.uk\/2012\/10\/more-free-propagation-books.html\" target=\"_blank\" rel=\"noopener noreferrer\">ebooks<\/a> about HF propagation<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The links below provide information about High Frequency propagation Please note the RSGB is not responsible for the content of external websites. &nbsp; Understanding LF and HF Propagation (16-page\/724KB PDF) by G3NYK and G0KYA Propagation of Radio Waves over northerly paths (Uppsala-Leicester) (17-page\/2.8MB PDF) by E.M. Warrington and others D-Region Absorption AA7A&#8217;s Propagation Tools Page [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"parent":657,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4849","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/pages\/4849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/comments?post=4849"}],"version-history":[{"count":4,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/pages\/4849\/revisions"}],"predecessor-version":[{"id":47921,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/pages\/4849\/revisions\/47921"}],"up":[{"embeddable":true,"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/pages\/657"}],"wp:attachment":[{"href":"https:\/\/rsgb.org\/main\/wp-json\/wp\/v2\/media?parent=4849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}