{"id":3939,"date":"2026-09-10T09:21:17","date_gmt":"2026-09-10T00:21:17","guid":{"rendered":"https:\/\/y42u.net\/tec001\/2026\/09\/10\/gnss-signal-power-weakness-field\/"},"modified":"2026-09-10T09:21:17","modified_gmt":"2026-09-10T00:21:17","slug":"gnss-signal-power-weakness-field","status":"publish","type":"post","link":"https:\/\/y42u.net\/tec001\/2026\/09\/10\/gnss-signal-power-weakness-field\/","title":{"rendered":"GNSS\u306e\u96fb\u6ce2\u306f\u3069\u308c\u304f\u3089\u3044\u5f31\u3044\uff1f \u2014 \u5730\u8868\u30671\u4eac\u5206\u306e1\u30ef\u30c3\u30c8\u3001\u96d1\u97f3\u3088\u308a18dB\u4e0b\u306e\u4fe1\u53f7\u3092\u53d7\u4fe1\u6a5f\u304c\u62fe\u3048\u308b\u7406\u7531"},"content":{"rendered":"<style>img.autopost-single-image{width:30%;max-width:100%;height:auto;display:block;}@media (max-width: 768px){img.autopost-single-image{width:50%;}}<\/style>\n<p><img decoding=\"async\" style=\"width:80%;max-width:100%;height:auto;display:block;margin:0 auto;\" src=\"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/09\/gde-gnss-signal-power-weakness-field.jpeg\" alt=\"GNSS\u306e\u96fb\u6ce2\u306f\u3069\u308c\u304f\u3089\u3044\u5f31\u3044\uff1f \u2014 \u5730\u8868\u30671\u4eac\u5206\u306e1\u30ef\u30c3\u30c8\u3001\u96d1\u97f3\u3088\u308a18dB\u4e0b\u306e\u4fe1\u53f7\u3092\u53d7\u4fe1\u6a5f\u304c\u62fe\u3048\u308b\u7406\u7531\"><\/p>\n<h1 id=\"gnss-1118db\">GNSS\u306e\u96fb\u6ce2\u306f\u3069\u308c\u304f\u3089\u3044\u5f31\u3044\uff1f \u2014 \u5730\u8868\u30671\u4eac\u5206\u306e1\u30ef\u30c3\u30c8\u3001\u96d1\u97f3\u3088\u308a18dB\u4e0b\u306e\u4fe1\u53f7\u3092\u53d7\u4fe1\u6a5f\u304c\u62fe\u3048\u308b\u7406\u7531<\/h1>\n<p><strong>GPS\u306eL1 C\/A\u4fe1\u53f7\u304c\u5730\u8868\u306b\u5c4a\u304f\u3068\u304d\u306e\u898f\u683c\u4e0a\u306e\u6700\u4f4e\u96fb\u529b\u306f \u2212158.5 dBW\u3001\u304a\u3088\u305d1\u4eac\u5206\u306e1.4\u30ef\u30c3\u30c8\u3067\u3059\u3002<\/strong> \u3053\u308c\u306f\u540c\u3058\u53d7\u4fe1\u5e2f\u57df\u306b\u5165\u3063\u3066\u304f\u308b\u71b1\u96d1\u97f3\u3088\u308a<strong>\u7d0418dB\uff08\u7d0460\u500d\uff09\u5f31\u3044<\/strong>\u3068\u3044\u3046\u610f\u5473\u3067\u3001\u7d20\u76f4\u306b\u6e2c\u308c\u3070\u30ce\u30a4\u30ba\u306b\u3057\u304b\u898b\u3048\u307e\u305b\u3093\u3002\u305d\u308c\u3067\u3082\u6e2c\u4f4d\u3067\u304d\u308b\u306e\u306f\u3001\u53d7\u4fe1\u6a5f\u304c\u62e1\u6563\u7b26\u53f7\u3068\u306e\u76f8\u95a2\u3067\u304a\u3088\u305d43dB\u5206\u3092\u7a3c\u3044\u3067\u3044\u308b\u304b\u3089\u3067\u3059\u3002\u73fe\u5834\u3067\u8d77\u304d\u308b\u300c\u6728\u306e\u4e0b\u3067Fix\u3057\u306a\u3044\u300d\u300c\u5efa\u7269\u969b\u3067\u5207\u308c\u308b\u300d\u306e\u6b63\u4f53\u306f\u3001\u3053\u306e\u8584\u6c37\u306e\u4e0a\u306b\u7acb\u3063\u3066\u3044\u308b\u6570\u5b57\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2 id=\"_1\">\u6570\u5b57\u3092\u4e26\u3079\u3066\u307f\u308b<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u9805\u76ee<\/th>\n<th>\u5024<\/th>\n<th>\u5099\u8003<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u885b\u661f\u306e\u9001\u4fe1\u96fb\u529b\uff08L1\u5e2f\uff09<\/td>\n<td>25W\u7d1a<\/td>\n<td>\u767d\u71b1\u96fb\u7403\u7a0b\u5ea6<\/td>\n<\/tr>\n<tr>\n<td>\u885b\u661f\u307e\u3067\u306e\u8ddd\u96e2<\/td>\n<td>\u7d0420,200 km<\/td>\n<td>\u5929\u9802\u65b9\u5411\u3002\u5730\u5e73\u7dda\u5bc4\u308a\u3060\u3068\u7d0425,000 km<\/td>\n<\/tr>\n<tr>\n<td>\u81ea\u7531\u7a7a\u9593\u4f1d\u642c\u640d\u5931<\/td>\n<td>\u7d04182.5 dB<\/td>\n<td>1575.42 MHz\u30fb20,200 km<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5730\u8868\u3067\u306e\u6700\u4f4e\u53d7\u4fe1\u96fb\u529b\uff08L1 C\/A\uff09<\/strong><\/td>\n<td><strong>\u2212158.5 dBW<\/strong><\/td>\n<td>IS-GPS-200 \u306e\u898f\u5b9a\u5024<\/td>\n<\/tr>\n<tr>\n<td>\u30ef\u30c3\u30c8\u63db\u7b97<\/td>\n<td>\u7d04 1.4\u00d710\u207b\u00b9\u2076 W<\/td>\n<td>\uff1d\u7d041\u4eac\u5206\u306e1.4\u30ef\u30c3\u30c8<\/td>\n<\/tr>\n<tr>\n<td>dBm\u63db\u7b97<\/td>\n<td>\u7d04 \u2212128.5 dBm<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>25W\u3067\u9001\u308a\u51fa\u3057\u305f\u3082\u306e\u304c\u3001\u5730\u8868\u306b\u7740\u304f\u3053\u308d\u306b\u306f <strong>1.8\u00d710\u00b9\u2077\u5206\u306e1<\/strong> \u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u9001\u4fe1\u96fb\u529b\u309210\u500d\u306b\u3057\u305f\u3068\u3053\u308d\u306710dB\u3057\u304b\u6539\u5584\u3057\u307e\u305b\u3093\u3002GNSS\u306f\u6700\u521d\u304b\u3089\u300c\u5f31\u3044\u96fb\u6ce2\u3092\u524d\u63d0\u306b\u3057\u305f\u4ed5\u7d44\u307f\u300d\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u6bd4\u8f03\u3092\u6319\u3052\u308b\u3068\u3001\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u304cWi-Fi\u30eb\u30fc\u30bf\u306e\u305d\u3070\u3067\u53d7\u3051\u53d6\u308b\u96fb\u529b\u306f\u304a\u3088\u305d \u221260 dBm \u7a0b\u5ea6\u3067\u3059\u3002GNSS\u306e \u2212128.5 dBm \u306f\u305d\u306e<strong>\u7d04700\u4e07\u5206\u306e1<\/strong>\u306b\u3042\u305f\u308a\u307e\u3059\u3002<\/p>\n<h2 id=\"_2\">\u96d1\u97f3\u306e\u307b\u3046\u304c\u5f37\u3044<\/h2>\n<p>\u554f\u984c\u306f\u7d76\u5bfe\u5024\u3067\u306f\u306a\u304f\u3001\u96d1\u97f3\u3068\u306e\u6bd4\u3067\u3059\u3002<\/p>\n<p>\u71b1\u96d1\u97f3\u306e\u96fb\u529b\u5bc6\u5ea6\u306f\u3001\u7d76\u5bfe\u6e29\u5ea6290K\u306e\u3068\u304d<\/p>\n<p><strong>N\u2080 = kT \u2248 \u2212204 dBW\/Hz<\/strong><\/p>\n<p>\u3067\u3059\uff08k \u306f\u30dc\u30eb\u30c4\u30de\u30f3\u5b9a\u6570\uff09\u3002C\/A\u4fe1\u53f7\u3092\u53d7\u3051\u308b\u306e\u306b\u5fc5\u8981\u306a\u5e2f\u57df\u306f\u304a\u3088\u305d2.046 MHz\u306a\u306e\u3067\u3001\u305d\u306e\u5e2f\u57df\u306b\u5165\u308b\u96d1\u97f3\u96fb\u529b\u306f<\/p>\n<p><strong>\u2212204 + 10\u00b7log\u2081\u2080(2,046,000) \u2248 \u2212204 + 63.1 \uff1d \u2212140.9 dBW<\/strong><\/p>\n<p>\u4fe1\u53f7\u306f \u2212158.5 dBW\u3002\u3064\u307e\u308a<\/p>\n<p><strong>\u4fe1\u53f7 \u2212 \u96d1\u97f3 \uff1d \u2212158.5 \u2212(\u2212140.9) \uff1d \u7d04 \u221217.6 dB<\/strong><\/p>\n<p><strong>\u4fe1\u53f7\u306e\u307b\u3046\u304c\u96d1\u97f3\u3088\u308a\u7d0418dB\uff08\u7d0460\u500d\uff09\u5f31\u3044\u3002<\/strong> \u30b9\u30da\u30af\u30c8\u30e9\u30e0\u30a2\u30ca\u30e9\u30a4\u30b6\u3067\u773a\u3081\u3066\u3082\u3001GNSS\u306e\u4fe1\u53f7\u306f\u96d1\u97f3\u306e\u5e8a\u304b\u3089\u9854\u3092\u51fa\u3057\u307e\u305b\u3093\u3002\u300c\u305d\u3053\u306b\u4f55\u304b\u3042\u308b\u300d\u3053\u3068\u3059\u3089\u3001\u305d\u306e\u307e\u307e\u3067\u306f\u5206\u304b\u3089\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<h2 id=\"_3\">\u305d\u308c\u3067\u3082\u53d6\u308a\u51fa\u305b\u308b\u306e\u306f\u3001\u62e1\u6563\u7b26\u53f7\u306e\u304a\u304b\u3052<\/h2>\n<p>GNSS\u306e\u4fe1\u53f7\u306f<strong>\u30b9\u30da\u30af\u30c8\u30e9\u30e0\u62e1\u6563<\/strong>\u3068\u3044\u3046\u65b9\u5f0f\u3067\u9001\u3089\u308c\u3066\u3044\u307e\u3059\u300250 bps\u306e\u822a\u6cd5\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u30011.023 Mchips\/s \u306e\u64ec\u4f3c\u30e9\u30f3\u30c0\u30e0\u7b26\u53f7\uff08C\/A\u30b3\u30fc\u30c9\uff09\u3092\u639b\u3051\u5408\u308f\u305b\u3001\u308f\u3056\u3068\u5e2f\u57df\u3092\u5343\u500d\u4ee5\u4e0a\u306b\u5e83\u3052\u3066\u304b\u3089\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u53d7\u4fe1\u6a5f\u5074\u306f\u3001\u540c\u3058\u7b26\u53f7\u306e\u8907\u88fd\u3092\u81ea\u5206\u3067\u4f5c\u308a\u3001\u53d7\u4fe1\u6ce2\u3068\u639b\u3051\u5408\u308f\u305b\u3066\u7a4d\u7b97\u3057\u307e\u3059\uff08\u76f8\u95a2\uff09\u3002\u7b26\u53f7\u304c\u4e00\u81f4\u3057\u305f\u3068\u304d\u3060\u3051\u4fe1\u53f7\u6210\u5206\u304c\u7a4d\u307f\u4e0a\u304c\u308a\u3001\u96d1\u97f3\u306f\u6253\u3061\u6d88\u3057\u5408\u3063\u3066\u6b8b\u308a\u307e\u305b\u3093\u3002\u3053\u306e\u3068\u304d\u5f97\u3089\u308c\u308b\u5229\u5f97\u304c<strong>\u62e1\u6563\u5229\u5f97\uff08\u51e6\u7406\u5229\u5f97\uff09<\/strong>\u3067\u3059\u3002<\/p>\n<p><strong>\u62e1\u6563\u5229\u5f97 \uff1d 10\u00b7log\u2081\u2080(1,023,000 \u00f7 50) \u2248 43 dB<\/strong><\/p>\n<p>\u5148\u307b\u3069\u306e \u221217.6 dB \u306b\u3053\u306e43dB\u304c\u4e57\u308b\u306e\u3067\u3001<\/p>\n<p><strong>\u221217.6 + 43 \u2248 25 dB<\/strong><\/p>\n<p>\u3053\u3053\u307e\u3067\u6d6e\u304d\u4e0a\u304c\u3063\u3066\u3001\u306f\u3058\u3081\u3066\u5fa9\u8abf\u3067\u304d\u308b\u4fe1\u53f7\u306b\u306a\u308a\u307e\u3059\u3002\u300c\u96d1\u97f3\u306b\u57cb\u3082\u308c\u305f\u4fe1\u53f7\u3092\u6398\u308a\u51fa\u3059\u300d\u3068\u3044\u3046\u8a00\u3044\u65b9\u306f\u6bd4\u55a9\u3067\u306f\u306a\u304f\u3001\u6587\u5b57\u3069\u304a\u308a\u306e\u624b\u9806\u3067\u3059\u3002<\/p>\n<h2 id=\"cn0\">\u73fe\u5834\u3067\u898b\u308b\u6570\u5b57\u306f C\/N\u2080<\/h2>\n<p>\u5e2f\u57df\u3092\u6c7a\u3081\u3066\u8a08\u7b97\u3057\u305f\u300c\u4fe1\u53f7\u5bfe\u96d1\u97f3\u6bd4\u300d\u306f\u5e2f\u57df\u5e45\u3057\u3060\u3044\u3067\u5024\u304c\u5909\u308f\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u3001GNSS\u3067\u306f\u5e2f\u57df\u306b\u4f9d\u3089\u306a\u3044 <strong>C\/N\u2080\uff08\u642c\u9001\u6ce2\u96fb\u529b\u5bfe\u96d1\u97f3\u96fb\u529b\u5bc6\u5ea6\u6bd4\u3001\u5358\u4f4d dB-Hz\uff09<\/strong> \u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p><strong>C\/N\u2080 \uff1d \u2212158.5 +204.0 \uff1d 45.5 dB-Hz<\/strong><\/p>\n<p>\u3053\u308c\u304c\u898f\u683c\u4e0a\u306e\u6700\u4f4e\u4fdd\u8a3c\u5024\u3067\u3059\u3002\u5b9f\u969b\u306b\u306f\u53d7\u4fe1\u6a5f\u81ea\u8eab\u306e\u96d1\u97f3\u6307\u6570\uff08NF\uff09\u3067\u6570dB\u4e0b\u304c\u308a\u3001\u9006\u306b\u885b\u661f\u304c\u771f\u4e0a\u306b\u6765\u3066\u3044\u308c\u3070\u898f\u683c\u5024\u3088\u308a\u6570dB\u9ad8\u304f\u53d7\u304b\u308a\u307e\u3059\u3002<strong>\u89b3\u6e2c\u753b\u9762\u306eC\/N\u2080\u304c45 dB-Hz\u524d\u5f8c\u3067\u4e26\u3093\u3067\u3044\u308c\u3070\u3001\u305d\u306e\u885b\u661f\u306f\u300c\u898f\u683c\u3069\u304a\u308a\u300d\u306b\u5c4a\u3044\u3066\u3044\u308b<\/strong>\u3068\u3044\u3046\u8aad\u307f\u65b9\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305d\u3053\u304b\u3089\u4f55dB\u843d\u3061\u3066\u3044\u308b\u304b\u304c\u3001\u305d\u306e\u307e\u307e\u906e\u853d\u3084\u6e1b\u8870\u306e\u91cf\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" style=\"width:80%;max-width:100%;height:auto;display:block;margin:0 auto;\" src=\"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/08\/gde-multipath-rtk-fix-instability-field.jpeg\" alt=\"\u30de\u30eb\u30c1\u30d1\u30b9\u306b\u3088\u3063\u3066RTK\u306eFix\u304c\u4e0d\u5b89\u5b9a\u306b\u306a\u308b\u72b6\u6cc1\u306e\u56f3\u89e3\"><\/p>\n<h2 id=\"_4\">\u300c\u5f31\u3044\u300d\u3053\u3068\u304c\u73fe\u5834\u3067\u3069\u3046\u51fa\u308b\u304b<\/h2>\n<p><strong>\u6a39\u51a0\u306e\u4e0b<\/strong>\uff1a\u8449\u3068\u679d\u306f1575 MHz\u5e2f\u3092\u5438\u53ce\u30fb\u6563\u4e71\u3057\u307e\u3059\u3002\u91dd\u8449\u6a39\u6797\u306e\u4e2d\u3067\u306f\u6570dB\u304b\u3089\u5341\u6570dB\u306e\u6e1b\u8870\u304c\u666e\u901a\u306b\u8d77\u304d\u3001C\/N\u2080\u304c30 dB-Hz\u53f0\u307e\u3067\u843d\u3061\u308c\u3070\u642c\u9001\u6ce2\u4f4d\u76f8\u306e\u96d1\u97f3\u304c\u5897\u3048\u3001\u6574\u6570\u5024\u30d0\u30a4\u30a2\u30b9\u304c\u6c7a\u307e\u3089\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u6797\u5185\u3067\u300c\u96fb\u6ce2\u304c\u5165\u3089\u306a\u3044\u300d\u306e\u3067\u306f\u306a\u304f\u3001<strong>\u3082\u3068\u3082\u3068\u96d1\u97f3\u4ee5\u4e0b\u306e\u4fe1\u53f7\u304c\u3055\u3089\u306b\u524a\u3089\u308c\u3066\u3001\u76f8\u95a2\u3067\u62fe\u3044\u304d\u308c\u306a\u304f\u306a\u308b<\/strong>\u308f\u3051\u3067\u3059\u3002<\/p>\n<p><strong>\u5efa\u7269\u969b\u30fb\u8eca\u5185<\/strong>\uff1a\u30ac\u30e9\u30b9\u3084\u30dc\u30c7\u30a3\u3067\u306e\u6e1b\u8870\u306b\u52a0\u3048\u3066\u3001\u53cd\u5c04\u6ce2\uff08\u30de\u30eb\u30c1\u30d1\u30b9\uff09\u304c\u76f4\u9054\u6ce2\u3068\u540c\u7a0b\u5ea6\u306e\u5f37\u3055\u3067\u6df7\u3056\u308a\u307e\u3059\u3002\u76f4\u9054\u6ce2\u304c\u3082\u3068\u3082\u3068\u5f31\u3044\u306e\u3067\u3001\u53cd\u5c04\u6ce2\u304c\u76f8\u5bfe\u7684\u306b\u52b9\u3044\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p><strong>\u5e72\u6e09\u30fb\u59a8\u5bb3<\/strong>\uff1a\u3053\u308c\u304c\u3044\u3061\u3070\u3093\u9732\u9aa8\u3067\u3059\u3002\u5730\u8868\u30671\u4eac\u5206\u306e1\u30ef\u30c3\u30c8\u3057\u304b\u5c4a\u3044\u3066\u3044\u306a\u3044\u3068\u3053\u308d\u3078\u3001\u6570\u30ef\u30c3\u30c8\u306e\u59a8\u5bb3\u6ce2\u3092\u51fa\u305b\u3070\u6841\u9055\u3044\u306e\u5f37\u3055\u306b\u306a\u308a\u307e\u3059\u3002GNSS\u304c\u610f\u56f3\u7684\u306a\u59a8\u5bb3\u306b\u3082\u3001\u610f\u56f3\u3057\u306a\u3044\u96d1\u97f3\u6e90\uff08\u52a3\u5316\u3057\u305f\u96fb\u5b50\u6a5f\u5668\u3001\u4e0d\u9069\u5408\u306a\u30a2\u30f3\u30c6\u30ca\u7528DC\u91cd\u7573\u306a\u3069\uff09\u306b\u3082\u5f31\u3044\u306e\u306f\u3001\u3053\u306e\u96fb\u529b\u5dee\u304c\u7406\u7531\u3067\u3059\u3002\u73fe\u5834\u3067\u6025\u306b\u5168\u885b\u661f\u306eC\/N\u2080\u304c\u4e00\u6589\u306b\u4e0b\u304c\u3063\u305f\u3089\u3001\u906e\u853d\u3067\u306f\u306a\u304f<strong>\u5e2f\u57df\u5185\u306e\u5e72\u6e09<\/strong>\u3092\u7591\u3046\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><strong>\u30a2\u30f3\u30c6\u30ca\u304c\u52b9\u304f\u7406\u7531<\/strong>\uff1a\u53d7\u4fe1\u96fb\u529b\u3092\u4e0a\u3052\u308b\u624b\u6bb5\u304c\u300c\u826f\u3044\u30a2\u30f3\u30c6\u30ca\u300d\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3002\u5229\u5f97\u306e\u9ad8\u3044\u6e2c\u91cf\u7528\u30a2\u30f3\u30c6\u30ca\u3001\u30b0\u30e9\u30a6\u30f3\u30c9\u30d7\u30ec\u30fc\u30f3\u3001\u30c1\u30e7\u30fc\u30af\u30ea\u30f3\u30b0\u306f\u3001\u3069\u308c\u3082\u300c\u5f31\u3044\u76f4\u9054\u6ce2\u3092\u5c11\u3057\u3067\u3082\u7a3c\u304e\u3001\u53cd\u5c04\u6ce2\u3092\u6e1b\u3089\u3059\u300d\u305f\u3081\u306e\u9053\u5177\u3067\u3059\u3002\u53d7\u4fe1\u6a5f\u306e\u6027\u80fd\u3088\u308a\u5148\u306b\u30a2\u30f3\u30c6\u30ca\u3092\u898b\u76f4\u3059\u3079\u304d\u3001\u3068\u8a00\u308f\u308c\u308b\u306e\u306f\u3053\u3053\u306b\u7406\u7531\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2 id=\"_5\">\u307e\u3068\u3081<\/h2>\n<ul>\n<li>L1 C\/A\u4fe1\u53f7\u306e\u5730\u8868\u3067\u306e\u6700\u4f4e\u53d7\u4fe1\u96fb\u529b\u306f <strong>\u2212158.5 dBW \u2252 1.4\u00d710\u207b\u00b9\u2076 W<\/strong>\uff08\u7d041\u4eac\u5206\u306e1.4\u30ef\u30c3\u30c8\uff09<\/li>\n<li>\u5e2f\u57df2.046 MHz\u306e\u71b1\u96d1\u97f3\u306f\u7d04 \u2212140.9 dBW\u3002<strong>\u4fe1\u53f7\u306f\u96d1\u97f3\u3088\u308a\u7d0418dB\u5f31\u3044<\/strong><\/li>\n<li>\u62e1\u6563\u7b26\u53f7\u3068\u306e\u76f8\u95a2\u3067 <strong>\u7d0443dB<\/strong>\u306e\u62e1\u6563\u5229\u5f97\u3092\u5f97\u3066\u3001\u306f\u3058\u3081\u3066\u5fa9\u8abf\u3067\u304d\u308b<\/li>\n<li>\u5e2f\u57df\u306b\u4f9d\u3089\u306a\u3044\u6307\u6a19\u304c <strong>C\/N\u2080<\/strong>\u3002\u898f\u683c\u4e0a\u306e\u6700\u4f4e\u4fdd\u8a3c\u306f <strong>45.5 dB-Hz<\/strong><\/li>\n<li>\u6a39\u51a0\u30fb\u5efa\u7269\u30fb\u8eca\u5185\u3067\u306e\u6e1b\u8870\u3082\u3001\u5e72\u6e09\u306b\u5f31\u3044\u3053\u3068\u3082\u3001\u3059\u3079\u3066\u300c\u5143\u304c\u3053\u308c\u3060\u3051\u5f31\u3044\u300d\u3053\u3068\u306e\u5e30\u7d50<\/li>\n<li>\u53d7\u4fe1\u96fb\u529b\u3092\u7a3c\u3052\u308b\u624b\u6bb5\u306f\u30a2\u30f3\u30c6\u30ca\u3057\u304b\u306a\u3044\u3002<strong>\u53d7\u4fe1\u6a5f\u3088\u308a\u30a2\u30f3\u30c6\u30ca\u3092\u5148\u306b\u7591\u3046<\/strong><\/li>\n<\/ul>\n<h3 id=\"_6\">\u51fa\u5178<\/h3>\n<ul>\n<li>IS-GPS-200\uff08GPS Interface Specification, L1 C\/A \u306e\u6700\u4f4e\u53d7\u4fe1\u96fb\u529b \u2212158.5 dBW\uff09 https:\/\/www.gps.gov\/technical\/icwg\/<\/li>\n<li>GPS Signal Plan | ESA Navipedia https:\/\/gssc.esa.int\/navipedia\/index.php\/GPS_Signal_Plan<\/li>\n<li>GPS L1 Link Budget\uff08\u9001\u4fe1\u96fb\u529b25W\uff1d14.25 dBW\u306e\u53c2\u8003\u5024\uff09 https:\/\/apps.fcc.gov\/els\/GetAtt.html?id=110032&amp;x=<\/li>\n<\/ul>\n<blockquote><p>\n\u672c\u8a18\u4e8b\u306e\u96fb\u529b\u5024\u306f\u898f\u683c\u4e0a\u306e\u6700\u4f4e\u4fdd\u8a3c\u5024\u304a\u3088\u3073\u4ee3\u8868\u7684\u306a\u30ea\u30f3\u30af\u30d0\u30b8\u30a7\u30c3\u30c8\u306b\u57fa\u3065\u304f\u53c2\u8003\u5024\u3067\u3059\uff082026\u5e749\u6708\u6642\u70b9\uff09\u3002\u5b9f\u969b\u306b\u53d7\u304b\u308b\u96fb\u529b\u30fbC\/N\u2080\u306f\u3001\u885b\u661f\u306e\u4ef0\u89d2\u3001\u30a2\u30f3\u30c6\u30ca\u306e\u5229\u5f97\u3068\u8a2d\u7f6e\u72b6\u6cc1\u3001\u53d7\u4fe1\u6a5f\u306e\u96d1\u97f3\u6307\u6570\u3001\u5468\u8fba\u306e\u906e\u853d\u7269\u306b\u3088\u3063\u3066\u5909\u308f\u308a\u307e\u3059\u3002\u6e1b\u8870\u91cf\u306e\u5e45\u3082\u74b0\u5883\u4f9d\u5b58\u306e\u76ee\u5b89\u3067\u3059\u3002\n<\/p><\/blockquote>\n<hr \/>\n<h2 id=\"_7\">\u6b21\u306b\u78ba\u8a8d\u3059\u308b<\/h2>\n<ul>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/09\/02\/elevation-mask-angle-gnss-rtk-field\/\">\u4ef0\u89d2\u30de\u30b9\u30af\u3092\u4f55\u5ea6\u306b\u8a2d\u5b9a\u3059\u3079\u304d\u304b\u3092\u78ba\u8a8d\u3059\u308b<\/a> \u2014 \u4f4e\u4ef0\u89d2\u306e\u885b\u661f\u304c\u5f31\u304f\u5c4a\u304f\u8a71\u3092\u3001\u8a2d\u5b9a\u5024\u306e\u5074\u304b\u3089\u898b\u305f\u8a18\u4e8b\u3067\u3059<\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/08\/19\/multipath-rtk-fix-instability-field\/\">\u30de\u30eb\u30c1\u30d1\u30b9\u3067Fix\u304c\u4e0d\u5b89\u5b9a\u306b\u306a\u308b\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b<\/a> \u2014 \u76f4\u9054\u6ce2\u304c\u5f31\u3044\u305f\u3081\u306b\u53cd\u5c04\u6ce2\u304c\u52b9\u3044\u3066\u3057\u307e\u3046\u73fe\u8c61\u306e\u8a73\u3057\u3044\u4e2d\u8eab\u3067\u3059<\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/09\/07\/forest-gnss-positioning-rinya-guide-field\/\">\u68ee\u6797\u306e\u4e2d\u3067GNSS\u3092\u4f7f\u3046\u3068\u304d\u306e\u624b\u9806\u3092\u78ba\u8a8d\u3059\u308b<\/a> \u2014 \u6a39\u51a0\u6e1b\u8870\u3078\u306e\u5177\u4f53\u7684\u306a\u5bfe\u51e6\u304c\u3001\u6797\u91ce\u5e81\u306e\u624b\u5f15\u304d\u3068\u3057\u3066\u6c7a\u307e\u3063\u3066\u3044\u307e\u3059<\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/07\/25\/skyplot-dop-guide\/\">SkyPlot\u3068DOP\u3067\u885b\u661f\u914d\u7f6e\u3092\u8aad\u3080\u65b9\u6cd5\u3092\u78ba\u8a8d\u3059\u308b<\/a> \u2014 C\/N\u2080\u3068\u4e26\u3079\u3066\u73fe\u5834\u3067\u898b\u308b\u3001\u3082\u3046\u3072\u3068\u3064\u306e\u6307\u6a19\u3067\u3059<\/li>\n<li><a href=\"https:\/\/gmp.y42u.net\/2026\/06\/30\/gnss-positioning-principle-visual\/\">GNSS\u304c\u4f4d\u7f6e\u3092\u51fa\u3059\u3057\u304f\u307f\u3092\u56f3\u3067\u78ba\u8a8d\u3059\u308b\uff08GeoPrism JP\uff09<\/a> \u2014 \u62fe\u3063\u305f\u4fe1\u53f7\u304b\u3089\u5ea7\u6a19\u306b\u81f3\u308b\u307e\u3067\u306e\u5168\u4f53\u50cf\u3067\u3059<\/li>\n<li>\u66f8\u7c4d\u3067\u307e\u3068\u3081\u3066\u5b66\u3076: <a href=\"https:\/\/www.amazon.co.jp\/dp\/B0HF4SJC1L\">\u300e\u65e5\u672c\u306e\u6e2c\u5730\u7cfbQ&amp;A\u300f\u7b2c10\u7ae0\u300cGPS\u3068\u307f\u3061\u3073\u304d\u306e\u3057\u304f\u307f\u300d<\/a>\uff08Kindle Unlimited\u5bfe\u5fdc\uff09<\/li>\n<\/ul>\n<hr \/>\n<blockquote><p>\n<strong>\u958b\u767a\u8005\u3088\u308a<\/strong>: \u30a2\u30d7\u30ea\u30fbKindle\u672c\u30fb\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u4e00\u89a7\u306f <a href=\"https:\/\/github.com\/amru195704\">GitHub: amru195704<\/a> \u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002\n<\/p><\/blockquote>\n<hr \/>\n<blockquote><p>\n<strong>\u304a\u9858\u3044<\/strong><br \/>\n\u672c\u8a18\u4e8b\u306e\u60c5\u5831\u306f\u53c2\u8003\u76ee\u7684\u3067\u63b2\u8f09\u3057\u3066\u304a\u308a\u3001\u6b63\u78ba\u6027\u30fb\u5b8c\u5168\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8aa4\u8a18\u30fb\u4e0d\u6b63\u78ba\u306a\u60c5\u5831\u304c\u3054\u3056\u3044\u307e\u3057\u305f\u3089\u3001\u30b3\u30e1\u30f3\u30c8\u6b04\u3088\u308a\u3054\u6307\u6458\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u78ba\u8a8d\u306e\u3046\u3048\u4fee\u6b63\u3044\u305f\u3057\u307e\u3059\u3002\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>GNSS\u306e\u96fb\u6ce2\u306f\u3069\u308c\u304f\u3089\u3044\u5f31\u3044\uff1f \u2014 \u5730\u8868\u30671\u4eac\u5206\u306e1\u30ef\u30c3\u30c8\u3001\u96d1\u97f3\u3088\u308a18dB\u4e0b\u306e\u4fe1\u53f7\u3092\u53d7\u4fe1\u6a5f\u304c\u62fe\u3048\u308b\u7406\u7531 GPS\u306eL1 C\/A\u4fe1\u53f7\u304c\u5730\u8868\u306b\u5c4a\u304f\u3068\u304d\u306e\u898f\u683c\u4e0a\u306e\u6700\u4f4e\u96fb\u529b\u306f \u2212158.5 dBW\u3001\u304a\u3088\u305d1\u4eac\u5206\u306e1.4\u30ef\u30c3\u30c8\u3067 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3938,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"sns_share_botton_hide":"","vkExUnit_sns_title":"","_vk_print_noindex":"","sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[505,16,15,510,14,507,225,506,504,511,508,509],"class_list":["post-3939","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-c-n0","tag-gnss","tag-gps","tag-is-gps-200","tag-rtk","tag-507","tag-225","tag-506","tag-504","tag-511","tag-508","tag-509"],"veu_head_title_object":{"title":"","add_site_title":""},"jetpack_publicize_connections":[],"jetpack-related-posts":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/09\/gde-gnss-signal-power-weakness-field.jpeg","_links":{"self":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/3939","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/comments?post=3939"}],"version-history":[{"count":0,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/3939\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/media\/3938"}],"wp:attachment":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/media?parent=3939"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/categories?post=3939"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/tags?post=3939"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}