{"id":172,"date":"2026-10-18T11:08:37","date_gmt":"2026-10-18T11:08:37","guid":{"rendered":"https:\/\/rf-diy.com\/?p=172"},"modified":"2026-10-18T12:06:08","modified_gmt":"2026-10-18T12:06:08","slug":"etat-de-la-propagation-hf","status":"publish","type":"post","link":"https:\/\/rf-diy.com\/index.php\/2026\/10\/18\/etat-de-la-propagation-hf\/","title":{"rendered":"Etat de la propagation HF"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Voici une page de synth\u00e8se sur la propagation HF avec les pr\u00e9visions pour les prochains jour et l&rsquo;historique du pass\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">J&rsquo;ai choisi de ne pas afficher toutes les bandes habituelles pour ne pas surcharger le graphique. <br>Comme vous le verrez, il n&rsquo;est pas difficile de se faire une id\u00e9e.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><br><strong>Petit rappel sur la propagation en g\u00e9n\u00e9rale pour le DX :<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>40 m (7 MHz) :<\/strong> meilleure de la tomb\u00e9e de la nuit jusqu\u2019\u00e0 l\u2019aube, avec un pic autour du lever et du coucher du soleil. En plein jour, elle ne donne que du court et moyen trajet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>20 m (14 MHz) :<\/strong> bande de jour, du lever du soleil jusqu\u2019en soir\u00e9e. Quand le flux solaire est \u00e9lev\u00e9, elle reste ouverte tard le soir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>15 m (21 MHz) :<\/strong> de jour seulement, avec un maximum en milieu de journ\u00e9e et en d\u00e9but d\u2019apr\u00e8s-midi. Elle ne s\u2019ouvre largement que si le flux est assez haut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>10 m (28 MHz) :<\/strong> de jour seulement comme le 15 m, mais plus courte et plus d\u00e9pendante du flux. Elle s\u2019ouvre surtout par intermittence.<\/p>\n\n\n\t\t<script type=\"application\/json\" class=\"hfp-json\" data-ajax=\"https:\/\/rf-diy.com\/wp-admin\/admin-ajax.php\" data-nonce=\"6717547317\" data-chart-src=\"https:\/\/cdn.jsdelivr.net\/npm\/chart.js@4.4.1\/dist\/chart.umd.min.js\" data-needs-refresh=\"1\" data-updated=\"1792320432\" data-lat=\"43.6\" data-lon=\"3.2\">{\"daily_flux\":{\"2026-09-07\":109.7,\"2026-09-08\":110.3,\"2026-09-09\":109,\"2026-09-10\":114.3,\"2026-09-11\":110,\"2026-09-12\":108,\"2026-09-13\":110,\"2026-09-14\":104.7,\"2026-09-15\":106.3,\"2026-09-16\":100,\"2026-09-17\":96.3,\"2026-09-18\":95.7,\"2026-09-19\":97,\"2026-09-20\":101.3,\"2026-09-21\":104.3,\"2026-09-22\":117,\"2026-09-23\":120.7,\"2026-09-24\":111.7,\"2026-09-25\":105,\"2026-09-26\":103.3,\"2026-09-27\":97,\"2026-09-28\":94.7,\"2026-09-29\":92,\"2026-09-30\":93,\"2026-10-01\":92.3,\"2026-10-02\":92,\"2026-10-03\":93,\"2026-10-04\":92.3,\"2026-10-05\":100,\"2026-10-06\":113,\"2026-10-07\":112.7,\"2026-10-08\":120.3,\"2026-10-09\":120.7,\"2026-10-10\":127.3,\"2026-10-11\":123,\"2026-10-12\":122.7,\"2026-10-13\":155.7,\"2026-10-14\":122.7,\"2026-10-15\":125.7,\"2026-10-16\":130,\"2026-10-17\":129.7},\"daily_ap\":{\"2026-10-11\":13.6,\"2026-10-12\":7.4,\"2026-10-13\":13.1,\"2026-10-14\":10.4,\"2026-10-15\":9.5,\"2026-10-16\":12.4,\"2026-10-17\":6.3,\"2026-10-18\":7.9},\"forecast\":{\"2026-10-18\":{\"f\":130,\"a\":5},\"2026-10-19\":{\"f\":125,\"a\":12},\"2026-10-20\":{\"f\":125,\"a\":22},\"2026-10-21\":{\"f\":115,\"a\":15},\"2026-10-22\":{\"f\":110,\"a\":10},\"2026-10-23\":{\"f\":110,\"a\":5},\"2026-10-24\":{\"f\":105,\"a\":15},\"2026-10-25\":{\"f\":95,\"a\":5},\"2026-10-26\":{\"f\":105,\"a\":5},\"2026-10-27\":{\"f\":110,\"a\":5},\"2026-10-28\":{\"f\":110,\"a\":5},\"2026-10-29\":{\"f\":110,\"a\":5},\"2026-10-30\":{\"f\":110,\"a\":5},\"2026-10-31\":{\"f\":105,\"a\":30},\"2026-11-01\":{\"f\":105,\"a\":25},\"2026-11-02\":{\"f\":105,\"a\":10},\"2026-11-03\":{\"f\":100,\"a\":5},\"2026-11-04\":{\"f\":105,\"a\":5},\"2026-11-05\":{\"f\":105,\"a\":5},\"2026-11-06\":{\"f\":110,\"a\":10},\"2026-11-07\":{\"f\":110,\"a\":10},\"2026-11-08\":{\"f\":120,\"a\":16},\"2026-11-09\":{\"f\":115,\"a\":28},\"2026-11-10\":{\"f\":110,\"a\":14},\"2026-11-11\":{\"f\":105,\"a\":8},\"2026-11-12\":{\"f\":100,\"a\":5},\"2026-11-13\":{\"f\":95,\"a\":5},\"2026-11-14\":{\"f\":95,\"a\":5},\"2026-11-15\":{\"f\":100,\"a\":5},\"2026-11-16\":{\"f\":100,\"a\":5},\"2026-11-17\":{\"f\":105,\"a\":15},\"2026-11-18\":{\"f\":100,\"a\":20},\"2026-11-19\":{\"f\":100,\"a\":15},\"2026-11-20\":{\"f\":95,\"a\":10},\"2026-11-21\":{\"f\":95,\"a\":5},\"2026-11-22\":{\"f\":105,\"a\":5},\"2026-11-23\":{\"f\":110,\"a\":5},\"2026-11-24\":{\"f\":110,\"a\":5},\"2026-11-25\":{\"f\":110,\"a\":5},\"2026-11-26\":{\"f\":110,\"a\":5},\"2026-11-27\":{\"f\":105,\"a\":30},\"2026-11-28\":{\"f\":105,\"a\":25},\"2026-11-29\":{\"f\":105,\"a\":10},\"2026-11-30\":{\"f\":100,\"a\":5},\"2026-12-01\":{\"f\":105,\"a\":5}},\"history\":{\"2021-10\":{\"f\":90.3,\"s\":37.4},\"2021-11\":{\"f\":86.9,\"s\":34.8},\"2021-12\":{\"f\":102.9,\"s\":67.5},\"2022-01\":{\"f\":104.1,\"s\":55.3},\"2022-02\":{\"f\":109.2,\"s\":60.9},\"2022-03\":{\"f\":117.8,\"s\":78.6},\"2022-04\":{\"f\":130.6,\"s\":84},\"2022-05\":{\"f\":134,\"s\":96.5},\"2022-06\":{\"f\":115.8,\"s\":70.3},\"2022-07\":{\"f\":125.6,\"s\":91.4},\"2022-08\":{\"f\":118.1,\"s\":74.6},\"2022-09\":{\"f\":134.7,\"s\":96},\"2022-10\":{\"f\":132.8,\"s\":95.5},\"2022-11\":{\"f\":123.6,\"s\":80.5},\"2022-12\":{\"f\":148.5,\"s\":112.8},\"2023-01\":{\"f\":182.5,\"s\":144.4},\"2023-02\":{\"f\":172.1,\"s\":111.3},\"2023-03\":{\"f\":157.5,\"s\":123.3},\"2023-04\":{\"f\":145.9,\"s\":97.6},\"2023-05\":{\"f\":156,\"s\":137.4},\"2023-06\":{\"f\":162.4,\"s\":160.5},\"2023-07\":{\"f\":177.5,\"s\":160},\"2023-08\":{\"f\":153.9,\"s\":114.8},\"2023-09\":{\"f\":155.7,\"s\":134.2},\"2023-10\":{\"f\":141.6,\"s\":99.9},\"2023-11\":{\"f\":154.4,\"s\":107.1},\"2023-12\":{\"f\":159.3,\"s\":113.5},\"2024-01\":{\"f\":164,\"s\":126},\"2024-02\":{\"f\":173.3,\"s\":123},\"2024-03\":{\"f\":155.2,\"s\":103.7},\"2024-04\":{\"f\":161.7,\"s\":137},\"2024-05\":{\"f\":188.4,\"s\":172.1},\"2024-06\":{\"f\":185.1,\"s\":164.1},\"2024-07\":{\"f\":198.6,\"s\":196.8},\"2024-08\":{\"f\":245.6,\"s\":216},\"2024-09\":{\"f\":196.7,\"s\":141.1},\"2024-10\":{\"f\":222.6,\"s\":165.8},\"2024-11\":{\"f\":200,\"s\":154.1},\"2024-12\":{\"f\":196.9,\"s\":154.6},\"2025-01\":{\"f\":189.4,\"s\":137},\"2025-02\":{\"f\":184.3,\"s\":155.7},\"2025-03\":{\"f\":163.8,\"s\":134.2},\"2025-04\":{\"f\":162.2,\"s\":141.4},\"2025-05\":{\"f\":135.3,\"s\":78.5},\"2025-06\":{\"f\":131.5,\"s\":114.6},\"2025-07\":{\"f\":137.7,\"s\":125.9},\"2025-08\":{\"f\":156.1,\"s\":133.7},\"2025-09\":{\"f\":153.9,\"s\":129.7},\"2025-10\":{\"f\":139.7,\"s\":114.8},\"2025-11\":{\"f\":141.6,\"s\":91.7},\"2025-12\":{\"f\":160.1,\"s\":124.2},\"2026-01\":{\"f\":151.2,\"s\":115},\"2026-02\":{\"f\":135.9,\"s\":77.4},\"2026-03\":{\"f\":130.7,\"s\":86.6},\"2026-04\":{\"f\":120,\"s\":79},\"2026-05\":{\"f\":125.7,\"s\":101.8},\"2026-06\":{\"f\":138.2,\"s\":93.3},\"2026-07\":{\"f\":136,\"s\":78.1},\"2026-08\":{\"f\":116.2,\"s\":76},\"2026-09\":{\"f\":105.4,\"s\":60.3}},\"pred_monthly\":{\"2026-10\":{\"f\":125.9,\"h\":130.2,\"l\":119.8},\"2026-11\":{\"f\":126,\"h\":130.1,\"l\":119.1},\"2026-12\":{\"f\":125.8,\"h\":129.6,\"l\":118},\"2027-01\":{\"f\":124.9,\"h\":129,\"l\":116.4},\"2027-02\":{\"f\":123.3,\"h\":127.8,\"l\":114.4},\"2027-03\":{\"f\":121.4,\"h\":126.1,\"l\":112.2}}}<\/script>\t\t<div class=\"hfp\" id=\"hfp-1\" data-hfp>\n\t\t\t<p class=\"hfp-empty\" data-hfp-empty>Loading propagation data\u2026<\/p>\n\n\t\t\t<div class=\"hfp-body\" data-hfp-body hidden>\n\t\t\t\t<h3 class=\"hfp-title\">DX conditions today (long distance)<\/h3>\n\t\t\t\t<div class=\"hfp-tiles\" data-hfp-tiles><\/div>\n\t\t\t\t<p class=\"hfp-meta\" data-hfp-meta><\/p>\n\n\t\t\t\t<div class=\"hfp-tz\" role=\"group\" aria-label=\"Time zone\">\n\t\t\t\t\t<button type=\"button\" data-hfp-tzbtn=\"local\" aria-pressed=\"true\">Local time<\/button>\n\t\t\t\t\t<button type=\"button\" data-hfp-tzbtn=\"utc\" aria-pressed=\"false\">UTC<\/button>\n\t\t\t\t<\/div>\n\n\t\t\t\t<div data-hfp-hourly hidden>\n\t\t\t\t\t<h3 class=\"hfp-title\">DX: hour by hour today <span class=\"hfp-sub\">(<span data-hfp-tzlabel><\/span>)<\/span><\/h3>\n\t\t\t\t\t<div class=\"hfp-strip\" data-hfp-strip><\/div>\n\t\t\t\t\t<p class=\"hfp-note\">Hourly profile estimated from the daily index and the position of the sun: 40 m is best around night and twilight, 20 m by day, 15 m and 10 m mostly around midday. It is a rule of thumb, not a measurement.<\/p>\n\t\t\t\t<\/div>\n\n\t\t\t\t<h3 class=\"hfp-title\">DX: last 30 days and forecast<\/h3>\n\t\t\t\t<div class=\"hfp-chart\"><canvas data-hfp-chart1 role=\"img\" aria-label=\"DX propagation index per band over the last 30 days and the coming weeks\"><\/canvas><\/div>\n\n\t\t\t\t<h3 class=\"hfp-title\">DX: five-year history<\/h3>\n\t\t\t\t<div class=\"hfp-chart\"><canvas data-hfp-chart2 role=\"img\" aria-label=\"Monthly DX propagation index per band over the last five years\"><\/canvas><\/div>\n\n\t\t\t\t<div data-hfp-hourly hidden>\n\t\t\t\t\t<h3 class=\"hfp-title\">NVIS conditions (regional, up to about 500 km)<\/h3>\n\t\t\t\t\t<p class=\"hfp-note\">NVIS works when the frequency is below the critical frequency of the F2 layer (foF2) and above the absorption limit of the D layer. By day, 40 m and 60 m are usually the best; at night, 80 m and 160 m take over and 40 m often skips over nearby stations.<\/p>\n\t\t\t\t\t<div class=\"hfp-tiles\" data-hfp-nvis-tiles><\/div>\n\t\t\t\t\t<p class=\"hfp-meta\" data-hfp-nvis-meta><\/p>\n\n\t\t\t\t\t<h3 class=\"hfp-title\">NVIS: today and tomorrow, hour by hour <span class=\"hfp-sub\">(<span data-hfp-tzlabel><\/span>)<\/span><\/h3>\n\t\t\t\t\t<div class=\"hfp-chart\"><canvas data-hfp-chart3 role=\"img\" aria-label=\"Estimated NVIS index per band for today and tomorrow, hour by hour\"><\/canvas><\/div>\n\t\t\t\t\t<p class=\"hfp-note\">NVIS values are estimated from the solar flux, the time of day and geomagnetic activity. They are not ionosonde measurements. Shaded areas are night. The 60 m band is not available to all amateurs in all countries.<\/p>\n\t\t\t\t<\/div>\n\n\t\t\t\t<div class=\"hfp-legend-note\">\n\t\t\t\t\t<p>The DX index (0\u2013100 %) is an estimate of how open a band is for long-distance contacts, computed from the solar flux (F10.7) and geomagnetic activity. It is not a measurement: real conditions also depend on time of day, season and location.<\/p>\n\t\t\t\t\t<p>\n\t\t\t\t\t\t<span class=\"hfp-dot hfp-poor\"><\/span>Poor: below 33 %\t\t\t\t\t\t<span class=\"hfp-dot hfp-fair\"><\/span>Fair: 33\u201365 %\t\t\t\t\t\t<span class=\"hfp-dot hfp-good\"><\/span>Good: 66 % and above\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\n\t\t\t\t<details class=\"hfp-sources\">\n\t\t\t\t\t<summary>Data sources<\/summary>\n\t\t\t\t\t<p>Data: NOAA Space Weather Prediction Center (public JSON files). Cached on this site and refreshed up to four times a day.<\/p>\n\t\t\t\t\t<ul>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<li>Monthly observed solar indices (5-year history):\n\t\t\t\t\t\t\t\t<a href=\"https:\/\/services.swpc.noaa.gov\/json\/solar-cycle\/observed-solar-cycle-indices.json\" target=\"_blank\" rel=\"noopener\">https:\/\/services.swpc.noaa.gov\/json\/solar-cycle\/observed-solar-cycle-indices.json<\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<li>Predicted solar cycle (monthly, with high\/low range):\n\t\t\t\t\t\t\t\t<a href=\"https:\/\/services.swpc.noaa.gov\/json\/solar-cycle\/predicted-solar-cycle.json\" target=\"_blank\" rel=\"noopener\">https:\/\/services.swpc.noaa.gov\/json\/solar-cycle\/predicted-solar-cycle.json<\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<li>Observed 10.7 cm solar flux (last days):\n\t\t\t\t\t\t\t\t<a href=\"https:\/\/services.swpc.noaa.gov\/json\/f107_cm_flux.json\" target=\"_blank\" rel=\"noopener\">https:\/\/services.swpc.noaa.gov\/json\/f107_cm_flux.json<\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<li>Planetary K-index (last 7 days):\n\t\t\t\t\t\t\t\t<a href=\"https:\/\/services.swpc.noaa.gov\/products\/noaa-planetary-k-index.json\" target=\"_blank\" rel=\"noopener\">https:\/\/services.swpc.noaa.gov\/products\/noaa-planetary-k-index.json<\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<li>45-day forecast of F10.7 flux and Ap index:\n\t\t\t\t\t\t\t\t<a href=\"https:\/\/services.swpc.noaa.gov\/json\/45-day-forecast.json\" target=\"_blank\" rel=\"noopener\">https:\/\/services.swpc.noaa.gov\/json\/45-day-forecast.json<\/a><\/li>\n\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t<\/details>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n","protected":false},"excerpt":{"rendered":"<p>Voici une page de synth\u00e8se sur la propagation HF avec les pr\u00e9visions pour les prochains jour et l&rsquo;historique du pass\u00e9. J&rsquo;ai choisi de ne pas afficher toutes les bandes habituelles pour ne pas surcharger le graphique. Comme vous le verrez, il n&rsquo;est pas difficile de se faire une id\u00e9e. Petit rappel sur la propagation en [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":185,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-172","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-propagation"],"_links":{"self":[{"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/posts\/172","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/comments?post=172"}],"version-history":[{"count":12,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/posts\/172\/revisions"}],"predecessor-version":[{"id":188,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/posts\/172\/revisions\/188"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/media\/185"}],"wp:attachment":[{"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/media?parent=172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/categories?post=172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rf-diy.com\/index.php\/wp-json\/wp\/v2\/tags?post=172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}