{"id":468,"date":"2026-01-12T08:44:45","date_gmt":"2026-01-12T08:44:45","guid":{"rendered":"https:\/\/rwc-finland.fmi.fi\/?page_id=468"},"modified":"2026-01-12T09:17:17","modified_gmt":"2026-01-12T09:17:17","slug":"ionosphere","status":"publish","type":"page","link":"https:\/\/rwc-finland.fmi.fi\/index.php\/ionosphere\/","title":{"rendered":"Ionosphere"},"content":{"rendered":"\n<div class=\"wp-block-columns has-nv-site-bg-background-color has-background is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Scintillation<\/h2>\n\n\n\n<p>Ionospheric scintillation is measured using specialized GNSS receivers. The receivers compute indices that describe the strength of scintillation in the received positioning signals: S4 for amplitude scintillation and Phi60 for phase scintillation. In the scintillation calculations, only signals from positioning satellites observed at elevation above 30 degrees are used.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Map<\/h3>\n\n\n\n<p>The geographic location of the more common phase scintillation at high latitudes, calculated at an altitude of 350 km.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/space.fmi.fi\/~avs\/scintillation\/phi60_ipp_latest.png\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Stations<\/h3>\n\n\n\n<p>Station-specific plots for amplitude and phase scintillation. In the plots, individual points represent the scintillation of a single satellite signal over a one-minute interval. The plots also indicate the threshold values used by aviation space weather centers for moderate (MOD) and severe (SEV) scintillation. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/space.fmi.fi\/~avs\/scintillation\/PAL_latest.png\" alt=\"\"\/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/space.fmi.fi\/~avs\/scintillation\/SOD_latest.png\" alt=\"\"\/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/space.fmi.fi\/~avs\/scintillation\/SUO_latest.png\" alt=\"\"\/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/space.fmi.fi\/~avs\/scintillation\/HEL_latest.png\" alt=\"\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Scintillation Ionospheric scintillation is measured using specialized GNSS receivers. The receivers compute indices that describe the strength of scintillation in the received positioning signals: S4 for amplitude scintillation and Phi60 for phase scintillation. In the scintillation calculations, only signals from positioning satellites observed at elevation above 30 degrees are used. Map The geographic location of&hellip;&nbsp;<a href=\"https:\/\/rwc-finland.fmi.fi\/index.php\/ionosphere\/\" class=\"\" rel=\"bookmark\">Lue lis\u00e4\u00e4 &raquo;<span class=\"screen-reader-text\">Ionosphere<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"class_list":["post-468","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/pages\/468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/comments?post=468"}],"version-history":[{"count":7,"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/pages\/468\/revisions"}],"predecessor-version":[{"id":478,"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/pages\/468\/revisions\/478"}],"wp:attachment":[{"href":"https:\/\/rwc-finland.fmi.fi\/index.php\/wp-json\/wp\/v2\/media?parent=468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}