{"id":839,"date":"2023-02-28T08:45:11","date_gmt":"2023-02-28T03:15:11","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=839"},"modified":"2024-02-07T21:33:28","modified_gmt":"2024-02-07T16:03:28","slug":"what-is-auroral-propagation-of-vhf-in-amateur-radio","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/what-is-auroral-propagation-of-vhf-in-amateur-radio\/","title":{"rendered":"What is Auroral Propagation of VHF in Amateur Radio?"},"content":{"rendered":"<h2><span style=\"color: #008000;\">What is Auroral Propagation of VHF in Amateur Radio?<\/span><\/h2>\n<p>Usually Aurora would mean a radio black out on HF due to ionospheric activity. But Aurora can be used to our advantage for propagation on VHF, and rarely on UHF. Good directional antennas are required for auroral propagation. Beams are directed towards the auroral zone and not in the direction of the station being contacted. Distortion is quite likely in voice signals and CW communication may fare better.<\/p>\n<figure id=\"attachment_849\" aria-describedby=\"caption-attachment-849\" style=\"width: 738px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-849 size-full\" src=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2023\/02\/What-is-Auroral-Propagation-of-VHF-in-Amateur-Radio-1-e1677554101296.jpg\" alt=\"What is Auroral Propagation of VHF in Amateur Radio?\" width=\"738\" height=\"405\" srcset=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2023\/02\/What-is-Auroral-Propagation-of-VHF-in-Amateur-Radio-1-e1677554101296.jpg 738w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2023\/02\/What-is-Auroral-Propagation-of-VHF-in-Amateur-Radio-1-e1677554101296-300x165.jpg 300w\" sizes=\"auto, (max-width: 738px) 100vw, 738px\" \/><figcaption id=\"caption-attachment-849\" class=\"wp-caption-text\">What is Auroral Propagation of VHF in Amateur Radio?<\/figcaption><\/figure>\n<p>Contacts with stations up to 1800 Km away may be possible with auroral propagation on VHF. Suffix A like 5,7A is given for auroral signal reports, though the readability may not be truly 5! Digital communications do not fare well on auroral propagation. Though being a natural phenomenon it can occur at any time, aurora is more likely in <span style=\"font-size: revert; color: initial;\">February, April, July and October. Of course, being in tropics, auroral propagation is out of question for me as aurora is a polar event!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is Auroral Propagation of VHF in Amateur Radio? Usually Aurora would mean a radio black out on HF due to ionospheric activity. But Aurora can be used to our advantage for propagation on VHF, and rarely on UHF. Good directional antennas are required for auroral propagation. Beams are directed towards the auroral zone and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":848,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-ham-radio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Auroral Propagation of VHF in Amateur Radio? - Johnson&#039;s Techworld<\/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:\/\/johnsonfrancis.org\/techworld\/what-is-auroral-propagation-of-vhf-in-amateur-radio\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Auroral Propagation of VHF in Amateur Radio? - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"What is Auroral Propagation of VHF in Amateur Radio? Usually Aurora would mean a radio black out on HF due to ionospheric activity. But Aurora can be used to our advantage for propagation on VHF, and rarely on UHF. Good directional antennas are required for auroral propagation. Beams are directed towards the auroral zone and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/techworld\/what-is-auroral-propagation-of-vhf-in-amateur-radio\/\" \/>\n<meta property=\"og:site_name\" content=\"Johnson&#039;s Techworld\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-28T03:15:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-07T16:03:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2023\/02\/What-is-Auroral-Propagation-of-VHF-in-Amateur-Radio.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"839\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/what-is-auroral-propagation-of-vhf-in-amateur-radio\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/what-is-auroral-propagation-of-vhf-in-amateur-radio\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"headline\":\"What is Auroral Propagation of VHF in Amateur Radio?\",\"datePublished\":\"2023-02-28T03:15:11+00:00\",\"dateModified\":\"2024-02-07T16:03:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/what-is-auroral-propagation-of-vhf-in-amateur-radio\\\/\"},\"wordCount\":183,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/what-is-auroral-propagation-of-vhf-in-amateur-radio\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2023\\\/02\\\/What-is-Auroral-Propagation-of-VHF-in-Amateur-Radio.jpg\",\"articleSection\":[\"Amateur Radio (Ham Radio)\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/what-is-auroral-propagation-of-vhf-in-amateur-radio\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/what-is-auroral-propagation-of-vhf-in-amateur-radio\\\/\",\"name\":\"What is Auroral Propagation of VHF in Amateur Radio? 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