{"id":1018,"date":"2015-04-10T10:34:25","date_gmt":"2015-04-10T10:34:25","guid":{"rendered":"http:\/\/www.tsgarc.uk\/?p=1018"},"modified":"2015-04-10T10:34:25","modified_gmt":"2015-04-10T10:34:25","slug":"time-signals","status":"publish","type":"post","link":"https:\/\/www.tsgarc.uk\/?p=1018","title":{"rendered":"Time Signals"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/www.tsgarc.uk\/wp-content\/uploads\/2015\/04\/wwv-20.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-1020\" src=\"https:\/\/i0.wp.com\/www.tsgarc.uk\/wp-content\/uploads\/2015\/04\/wwv-20.jpg?resize=200%2C300\" alt=\"WWV 20MHz\" width=\"200\" height=\"300\" srcset=\"https:\/\/i0.wp.com\/www.tsgarc.uk\/wp-content\/uploads\/2015\/04\/wwv-20.jpg?resize=200%2C300&amp;ssl=1 200w, https:\/\/i0.wp.com\/www.tsgarc.uk\/wp-content\/uploads\/2015\/04\/wwv-20.jpg?w=400&amp;ssl=1 400w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>NIST, the <a title=\"NIST\" href=\"http:\/\/www.nist.gov\" target=\"_blank\">American National Institute of Standards and Technology<\/a>\u00a0are responsible for many things but one service which as radio amateurs we may associate to\u00a0them is the broadcast of time and frequency information 24 hours a day from their radio station, callsign WWV, in Fort Collins, Colorado.<\/p>\n<p>The information broadcast includes\u00a0time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD time code, geophysical alerts and marine storm warnings. \u00a0The transmissions are in the HF part of the radio spectrum and are powerful. \u00a0Transmissions on 5, 10 and 15MHz are at 10kW and 2.5kW on 2.5 and 20MHz. \u00a0Its worth noting that transmissions are DSB with AM modulation.<\/p>\n<p>In the UK we can hear these transmissions depending upon time-of-day, ionospheric conditions\u00a0and frequency. \u00a0They are RF frequency precise and thus can be used to check the alignment of a receiver amongst other things.<\/p>\n<p>Recently WWV has started transmissions again on 25MHz radiating 1kW from a monopole.<\/p>\n<p>For more information on WWV, including its history, images and a FAQ click <a title=\"WWV\" href=\"http:\/\/www.nist.gov\/pml\/div688\/grp40\/wwv.cfm\" target=\"_blank\">here<\/a>.<\/p>\n<p>Have a listen on precisely 5, 10, 15, 20 or 25MHz and see what you hear \ud83d\ude09<\/p>\n<p><em>Andrew<\/em><br \/>\n<em> G0RVM<\/em><\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>NIST, the American National Institute of Standards and Technology\u00a0are responsible for many things but one service which as radio amateurs we may associate to\u00a0them is the broadcast of time and frequency information 24 hours a day from their radio station, &hellip; <a href=\"https:\/\/www.tsgarc.uk\/?p=1018\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on wp_trim_excerpt --><!-- AddThis Share Buttons generic via filter on wp_trim_excerpt --><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[96,27,95],"class_list":["post-1018","post","type-post","status-publish","format-standard","hentry","category-news","tag-nist","tag-tsgarc","tag-wwv"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=\/wp\/v2\/posts\/1018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1018"}],"version-history":[{"count":1,"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=\/wp\/v2\/posts\/1018\/revisions"}],"predecessor-version":[{"id":1021,"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=\/wp\/v2\/posts\/1018\/revisions\/1021"}],"wp:attachment":[{"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tsgarc.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}