{"id":2341,"date":"2026-02-05T19:34:21","date_gmt":"2026-02-05T17:34:21","guid":{"rendered":"https:\/\/science-x.net\/?page_id=2341"},"modified":"2026-02-05T19:34:46","modified_gmt":"2026-02-05T17:34:46","slug":"satellite-signal-delay-calculator","status":"publish","type":"page","link":"https:\/\/science-x.net\/?page_id=2341","title":{"rendered":"Satellite Signal Delay Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-satdelay-0b7d2\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Satellite Signal Delay Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate radio signal latency to a satellite based on altitude. Uses speed of light and a simplified straight-line \u201cup + down\u201d path (approximate).\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-sat-form-0b7d2\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <!-- Preset -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-sat-preset-0b7d2\">Orbit preset<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-sat-preset-0b7d2\">\n          <option value=\"custom\" selected>Custom altitude<\/option>\n          <option value=\"leo\">LEO typical (~550 km)<\/option>\n          <option value=\"starlink\">Starlink-like (~550 km)<\/option>\n          <option value=\"meo\">MEO typical (~10,000 km)<\/option>\n          <option value=\"gps\">GPS (~20,200 km)<\/option>\n          <option value=\"geo\">GEO (~35,786 km)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose a preset or enter an altitude.<\/div>\n      <\/div>\n\n      <!-- Altitude -->\n      <div class=\"eco-tool__field\" id=\"eco-sat-alt-wrap-0b7d2\">\n        <label class=\"eco-tool__label\" for=\"eco-sat-alt-0b7d2\">Satellite altitude (km)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-sat-alt-0b7d2\" type=\"number\" min=\"100\" step=\"1\" value=\"550\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Altitude above Earth\u2019s surface.<\/div>\n      <\/div>\n\n      <!-- Path model -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\">Path model<\/label>\n        <div class=\"eco-tool__noteBox\">\n          We approximate the path as straight up + straight down:\n          <strong>distance \u2248 2 \u00d7 altitude<\/strong> for a ground station directly below the satellite.\n        <\/div>\n        <div class=\"eco-tool__hint\">Real networks add routing &#038; processing delays.<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"eco-sat-calc-0b7d2\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-sat-reset-0b7d2\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-sat-error-0b7d2\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-sat-result-0b7d2\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Estimated latency<\/h3>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">One-way delay<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-sat-one-0b7d2\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Ground \u2192 satellite (approx.)<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Round-trip time (RTT)<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-sat-rtt-0b7d2\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\">Ping-like \u201cthere and back\u201d<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Distance used<\/div>\n      <div class=\"eco-tool__metric-value\" id=\"eco-sat-dist-0b7d2\">\u2014<\/div>\n      <div class=\"eco-tool__metric-sub eco-tool__muted\" id=\"eco-sat-note-0b7d2\"><\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      Real satellite internet\/phone latency includes extra path length (not directly overhead), ground routing, and processing \u2014 often the dominant part.\n    <\/p>\n  <\/div>\n\n  <details class=\"eco-tool__details\">\n    <summary class=\"eco-tool__summary\">How we calculate<\/summary>\n    <div class=\"eco-tool__details-body\">\n      <p class=\"eco-tool__text\">\n        Speed of light c \u2248 299,792 km\/s. One-way \u2248 altitude \/ c. RTT \u2248 2 \u00d7 altitude \/ c (using our straight up+down model).\n      <\/p>\n    <\/div>\n  <\/details>\n<\/div>\n\n<style>\n.eco-tool{\n  border: 1px solid rgba(0,0,0,.12);\n  border-radius: 12px;\n  padding: 16px;\n}\n\n.eco-tool__grid3{\n  display: grid;\n  grid-template-columns: 1fr;\n  gap: 16px;\n}\n@media (min-width: 860px){\n  .eco-tool__grid3{ grid-template-columns: 1fr 1fr 1fr; }\n}\n\n.eco-tool__field{\n  display: flex;\n  flex-direction: column;\n  gap: 6px;\n}\n.eco-tool__label{ font-weight: 600; }\n\n.eco-tool__input{\n  height: 44px;\n  padding: 0 12px;\n  border: 1px solid rgba(0,0,0,.2);\n  border-radius: 10px;\n  font: inherit;\n  background: #fff;\n  box-sizing: border-box;\n}\n.eco-tool select.eco-tool__input{\n  appearance: none;\n  padding-right: 40px;\n}\n\n.eco-tool__hint{\n  font-size: .92em;\n  opacity: .78;\n  min-height: 38px;\n}\n\n.eco-tool__noteBox{\n  border: 1px solid rgba(0,0,0,.12);\n  border-radius: 12px;\n  padding: 12px;\n  background: rgba(0,0,0,.02);\n  min-height: 44px;\n}\n\n.eco-tool__actions{\n  display: flex;\n  gap: 10px;\n  margin-top: 16px;\n  align-items: center;\n  flex-wrap: wrap;\n}\n.eco-tool__btn{ padding: 10px 22px; }\n.eco-tool__btn--ghost{\n  background: transparent !important;\n  border: 1px solid rgba(0,0,0,.2) !important;\n}\n.eco-tool__btn--ghost:hover,\n.eco-tool__btn--ghost:focus{\n  background: rgba(0,0,0,.06) !important;\n  border-color: rgba(0,0,0,.35) !important;\n}\n\n.eco-tool__error{\n  font-weight: 600;\n  min-height: 1.2em;\n  flex: 1 1 240px;\n}\n\n.eco-tool__result{ margin-top: 16px; }\n.eco-tool__subtitle{ margin: 0 0 10px; }\n\n.eco-tool__cards{\n  display: grid;\n  gap: 10px;\n  grid-template-columns: 1fr;\n}\n@media (min-width: 860px){\n  .eco-tool__cards{ grid-template-columns: 1fr 1fr; }\n}\n\n.eco-tool__card{\n  border: 1px solid rgba(0,0,0,.12);\n  border-radius: 12px;\n  padding: 12px;\n}\n.eco-tool__card--wide{ margin-top: 10px; }\n\n.eco-tool__metric-label{ opacity: .85; font-weight: 600; }\n.eco-tool__metric-value{ font-size: 1.6em; font-weight: 800; margin-top: 6px; line-height: 1.1; }\n.eco-tool__metric-sub{ opacity: .85; margin-top: 6px; }\n.eco-tool__muted{ opacity: .8; }\n\n.eco-tool__note{ margin-top: 10px; opacity: .9; }\n\n.eco-tool__details{ margin-top: 14px; }\n.eco-tool__summary{ cursor: pointer; font-weight: 700; }\n.eco-tool__details-body{ margin-top: 10px; }\n<\/style>\n\n<script>\n(function(){\n  const S = \"0b7d2\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const presetEl = el(\"eco-sat-preset\");\n  const altEl = el(\"eco-sat-alt\");\n\n  const calcBtn = el(\"eco-sat-calc\");\n  const resetBtn = el(\"eco-sat-reset\");\n  const errorEl = el(\"eco-sat-error\");\n\n  const resultEl = el(\"eco-sat-result\");\n  const oneEl = el(\"eco-sat-one\");\n  const rttEl = el(\"eco-sat-rtt\");\n  const distEl = el(\"eco-sat-dist\");\n  const noteEl = el(\"eco-sat-note\");\n\n  const C_KM_PER_S = 299792;\n\n  const PRESETS = {\n    custom: null,\n    leo: 550,\n    starlink: 550,\n    meo: 10000,\n    gps: 20200,\n    geo: 35786\n  };\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n\n  function fmtMs(ms){\n    if (ms < 1) return `${ms.toFixed(3)} ms`;\n    if (ms < 10) return `${ms.toFixed(2)} ms`;\n    if (ms < 100) return `${ms.toFixed(1)} ms`;\n    return `${Math.round(ms)} ms`;\n  }\n\n  function updatePreset(){\n    const p = presetEl.value;\n    if (p !== \"custom\"){\n      altEl.value = String(PRESETS[p]);\n    }\n  }\n\n  function calculate(){\n    setError(\"\");\n\n    const altKm = Number(altEl.value);\n    if (!Number.isFinite(altKm) || altKm < 100){\n      setError(\"Please enter a valid altitude (minimum 100 km).\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    \/\/ Path model: one-way = altitude \/ c (straight up)\n    const oneWaySeconds = altKm \/ C_KM_PER_S;\n    const rttSeconds = (2 * altKm) \/ C_KM_PER_S;\n\n    const oneMs = oneWaySeconds * 1000;\n    const rttMs = rttSeconds * 1000;\n\n    oneEl.textContent = fmtMs(oneMs);\n    rttEl.textContent = fmtMs(rttMs);\n\n    distEl.textContent = `${(2 * altKm).toLocaleString()} km`;\n    noteEl.textContent = `Distance used: up + down \u2248 2 \u00d7 ${altKm.toLocaleString()} km (satellite directly overhead).`;\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    presetEl.value = \"leo\";\n    updatePreset();\n    setError(\"\");\n    resultEl.hidden = true;\n  }\n\n  \/\/ init\n  presetEl.value = \"leo\";\n  updatePreset();\n\n  presetEl.addEventListener(\"change\", updatePreset);\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Satellite Signal Delay Calculator Estimate radio signal latency to a satellite based on altitude. Uses speed of light and a simplified straight-line \u201cup + down\u201d path (approximate). Orbit preset Custom&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2295,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2341"}],"collection":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2341"}],"version-history":[{"count":2,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2341\/revisions"}],"predecessor-version":[{"id":2343,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2341\/revisions\/2343"}],"up":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2295"}],"wp:attachment":[{"href":"https:\/\/science-x.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}