{"id":243423,"date":"2016-11-02T15:44:18","date_gmt":"2016-11-02T19:44:18","guid":{"rendered":"http:\/\/amsat-uk.org\/?p=30812"},"modified":"2016-11-02T15:44:18","modified_gmt":"2016-11-02T19:44:18","slug":"hfsat-will-have-21-to-29-mhz-transponder","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=243423","title":{"rendered":"HFsat will have 21 to 29 MHz transponder"},"content":{"rendered":"<div data-shortcode=\"caption\" id=\"attachment_30813\" style=\"width: 310px\" class=\"wp-caption alignright\"><a href=\"https:\/\/ukamsat.files.wordpress.com\/2016\/11\/hfsat-conops.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-30813\" src=\"https:\/\/ukamsat.files.wordpress.com\/2016\/11\/hfsat-conops.png?w=300&#038;h=142\" alt=\"HFsat concept of operations\" width=\"300\" height=\"142\" srcset=\"https:\/\/ukamsat.files.wordpress.com\/2016\/11\/hfsat-conops.png?w=300&amp;h=142 300w, https:\/\/ukamsat.files.wordpress.com\/2016\/11\/hfsat-conops.png?w=150&amp;h=71 150w, https:\/\/ukamsat.files.wordpress.com\/2016\/11\/hfsat-conops.png 592w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p class=\"wp-caption-text\">HFsat concept of operations<\/p>\n<\/div>\n<p>US Naval Academy students are planning an amateur radio CubeSat <a href=\"http:\/\/aprs.org\/hfsat.html\" >HFsat<\/a> carrying an HF transponder as well as 2m APRS.<\/p>\n<p>They are working with <strong>Bill N6GHZ<\/strong> on the HF transponder card which will provide a bandwidth of 30 kHz, the frequencies are currently 21.4 MHz uplink and 29.42 MHz downlink. Doppler shift will be reduced to less than 2 Hz per second by using an inverting transponder.<\/p>\n<p>The satellite will be gravity gradient stabilized by its long full size 10 meter band halfwave HF dipole antenna with tip masses<\/p>\n<p>Read more about HFsat at <a href=\"http:\/\/aprs.org\/hfsat.html\" >http:\/\/aprs.org\/hfsat.html<\/a><\/p>\n<p>IARU satellite frequency coordination page <a href=\"http:\/\/www.amsat.org.uk\/iaru\/\" >http:\/\/www.amsat.org.uk\/iaru\/<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" border=\"0\" src=\"https:\/\/pixel.wp.com\/b.gif?host=amsat-uk.org&#038;blog=41081109&#038;%23038;post=30812&#038;%23038;subd=ukamsat&#038;%23038;ref=&#038;%23038;feed=1\" width=\"1\" height=\"1\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>US Naval Academy students are planning an amateur radio CubeSat HFsat carrying an HF transponder as well as 2m APRS. They are working with Bill N6GHZ on the HF transponder card which will provide a bandwidth of 30 kHz, the &hellip; <a href=\"https:\/\/amsat-uk.org\/2016\/11\/02\/hfsat-will-have-21-to-29-mhz-transponder\/\">Continue reading <span>&rarr;<\/span><\/a><img loading=\"lazy\" decoding=\"async\" alt=\"\" border=\"0\" src=\"https:\/\/pixel.wp.com\/b.gif?host=amsat-uk.org&amp;blog=41081109&amp;post=30812&amp;subd=ukamsat&amp;ref=&amp;feed=1\" width=\"1\" height=\"1\"><\/p>\n","protected":false},"author":51,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-243423","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-AMSAT"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/243423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=243423"}],"version-history":[{"count":2,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/243423\/revisions"}],"predecessor-version":[{"id":243680,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/243423\/revisions\/243680"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=243423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=243423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=243423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}