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aria-label=\"\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f\">\n<p><strong>\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f<\/strong><\/p>\n<ul>\n<li>CGPM\u306e\u6c7a\u8b705\u306f\u3001\u9023\u7d9a\u3057\u305fUTC\u306e\u958b\u59cb\u30922027\u5e745\u670820\u65e5\u3068\u5b9a\u3081\u307e\u3057\u305f\u30022026\u5e7410\u6708\u6642\u70b9\u3067\u3059\u3067\u306b\u5207\u308a\u66ff\u308f\u3063\u305f\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>\u5730\u7403\u306e\u81ea\u8ee2\u306b\u57fa\u3065\u304fUT1\u3068\u306e\u5dee\u3092\u3001\u6700\u59273,600\u79d2\u307e\u3067\u8a31\u5bb9\u3057\u307e\u3059\u3002\u305d\u306e\u65e5\u306b\u6642\u8a08\u30921\u6642\u9593\u52d5\u304b\u3059\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>UTC\u306e\u9023\u7d9a\u5316\u3068\u3001\u7121\u7dda\u3067\u6642\u523b\u5dee\u3092\u4f1d\u3048\u308b\u898f\u683c\u3084\u6a5f\u5668\u306e\u5bfe\u5fdc\u306f\u5225\u306e\u6bb5\u968e\u3067\u3059\u3002UT1\u304c\u5fc5\u8981\u306a\u7528\u9014\u3067\u306f\u3001\u5dee\u306e\u60c5\u5831\u3092\u5f15\u304d\u7d9a\u304d\u5229\u7528\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/section>\n<h2>\u539f\u5b50\u6642\u8a08\u306e\u79d2\u3068\u3001\u5730\u7403\u306e\u56de\u8ee2\u3092\u3064\u306a\u3050\u8abf\u6574<\/h2>\n<p>UTC\u306f\u3001\u56fd\u969b\u5358\u4f4d\u7cfb\uff08SI\uff09\u306e\u79d2\u306b\u57fa\u3065\u304f\u6642\u523b\u306e\u5c3a\u5ea6\u3067\u3059\u3002\u4e00\u65b9\u3001UT1\u306f\u5730\u7403\u304c\u3069\u3053\u307e\u3067\u56de\u8ee2\u3057\u305f\u304b\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002\u5730\u7403\u306e\u81ea\u8ee2\u306f\u4e00\u69d8\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u4e8c\u3064\u3092\u305d\u306e\u307e\u307e\u9032\u3081\u308b\u3068\u5dee\u304c\u5909\u5316\u3057\u307e\u3059\u3002\u3053\u308c\u307e\u3067\u306eUTC\u3067\u306f\u3001UT1\u3068\u306e\u5dee\u30920.9\u79d2\u4ee5\u5185\u306b\u4fdd\u3064\u3088\u3046\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u79d2\u3092\u633f\u5165\u307e\u305f\u306f\u524a\u9664\u3059\u308b\u904b\u7528\u304c\u5b9a\u3081\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u304c\u3001\u3046\u308b\u3046\u79d2\u3067\u3059\u3002<\/p>\n<p>\u73fe\u884c\u306eITU-R\u52e7\u544aTF.460-6\u3067\u306f\u3001\u6b63\u306e\u3046\u308b\u3046\u79d2\u3092\u5165\u308c\u308b\u3068\u304d\u3001UTC\u306e\u6708\u672b\u306b\u300c23\u664259\u520660\u79d2\u300d\u304c\u73fe\u308c\u307e\u3059\u3002\u8ca0\u306e\u3046\u308b\u3046\u79d2\u306a\u3089\u300c23\u664259\u520658\u79d2\u300d\u306e\u6b21\u304c\u7fcc\u65e5\u306e\u300c0\u66420\u52060\u79d2\u300d\u3067\u3059\u3002\u6c7a\u8b70\u306b\u3088\u308c\u3070\u8ca0\u306e\u3046\u308b\u3046\u79d2\u306f\u3053\u308c\u307e\u3067\u5b9f\u65bd\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u304c\u3001\u6e96\u5099\u304c\u5341\u5206\u3067\u306a\u3044\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u5f71\u97ff\u304c\u61f8\u5ff5\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u4e8c\u3064\u306e\u8a08\u6e2c\u88c5\u7f6e\u304c\u5225\u3005\u306e\u6642\u523b\u30b5\u30fc\u30d3\u30b9\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u4e00\u65b9\u304c\u79d2\u3092\u6bb5\u968e\u7684\u306b\u8abf\u6574\u3057\u3001\u3082\u3046\u4e00\u65b9\u304c\u7570\u306a\u308b\u65b9\u6cd5\u3092\u63a1\u308b\u3068\u3001\u540c\u3058\u73fe\u8c61\u306b\u4ed8\u3051\u308b\u6642\u523b\u304c\u98df\u3044\u9055\u3046\u304a\u305d\u308c\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u4ed5\u7d44\u307f\u3092\u8aac\u660e\u3059\u308b\u305f\u3081\u306e\u4f8b\u3067\u3059\u3002\u6c7a\u8b70\u3082\u3001\u30b5\u30fc\u30d3\u30b9\u3054\u3068\u306e\u8abf\u6574\u65b9\u6cd5\u306e\u9055\u3044\u304c\u3001\u30b7\u30b9\u30c6\u30e0\u9593\u306e\u6642\u523b\u306e\u4e0d\u6574\u5408\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u3092\u554f\u984c\u3068\u3057\u3066\u6319\u3052\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>3,600\u79d2\u306f\u300c\u8a31\u3059\u5dee\u300d\u3067\u3042\u308a\u3001\u6642\u8a08\u3092\u52d5\u304b\u3059\u91cf\u3067\u306f\u306a\u3044<\/h2>\n<p>\u4eca\u56de\u5909\u3048\u308b\u306e\u306f\u3001UTC\u3092\u5730\u7403\u306e\u81ea\u8ee2\u306b\u3069\u3053\u307e\u3067\u8fd1\u3065\u3051\u3066\u304a\u304f\u304b\u3068\u3044\u3046\u6761\u4ef6\u3067\u3059\u3002UT1\u3068\u306e\u5dee\u306e\u7d76\u5bfe\u5024\u306e\u4e0a\u9650\u30923,600\u79d2\u306b\u5e83\u3052\u3001\u6570\u4e16\u7d00\u306b\u308f\u305f\u308a\u3001\u4e0d\u9023\u7d9a\u306a\u8abf\u6574\u306a\u3057\u3067UTC\u3092\u7d99\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u65b9\u91dd\u3067\u3059\u30021\u79d2\u306e\u5358\u4f4d\u3092\u9577\u304f\u3059\u308b\u3053\u3068\u3067\u3082\u3001\u79fb\u884c\u65e5\u306b1\u6642\u9593\u306e\u6642\u5dee\u3092\u4f5c\u308b\u3053\u3068\u3067\u3082\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>NICT\u304c\u300c\u5b9f\u8cea\u7684\u306a\u5ec3\u6b62\u300d\u3068\u8868\u73fe\u3059\u308b\u306e\u306f\u3001\u3053\u306e\u9577\u3044\u671f\u9593\u306b\u3046\u308b\u3046\u79d2\u306e\u3088\u3046\u306a\u8abf\u6574\u304c\u4e0d\u8981\u306b\u306a\u308b\u305f\u3081\u3067\u305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class=\"wp-block-table\">\n<table>\n<thead>\n<tr>\n<th>\u78ba\u8a8d\u3059\u308b\u3053\u3068<\/th>\n<th>\u4eca\u56de\u306e\u6c7a\u5b9a\u3068\u6b8b\u308b\u4f5c\u696d<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>UTC\u3092\u3044\u3064\u9023\u7d9a\u5316\u3059\u308b\u304b<\/td>\n<td>\u6c7a\u8b70\u3067\u5b9a\u3081\u305f\u958b\u59cb\u65e5\u306f2027\u5e745\u670820\u65e5<\/td>\n<\/tr>\n<tr>\n<td>UT1\u3068\u306e\u5dee\u3092\u3069\u3046\u6271\u3046\u304b<\/td>\n<td>\u4e0a\u9650\u306f3,600\u79d2\u3002\u5dee\u306e\u89b3\u6e2c\u3068\u60c5\u5831\u63d0\u4f9b\u3092\u7d9a\u3051\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u7121\u7dda\u3067\u5dee\u3092\u3069\u3046\u4f1d\u3048\u308b\u304b<\/td>\n<td>\u9001\u4fe1\u7b26\u53f7\u306a\u3069\u306e\u66f4\u65b0\u3092ITU-R\u3067\u691c\u8a0e<\/td>\n<\/tr>\n<tr>\n<td>\u5229\u7528\u4e2d\u306e\u6a5f\u5668\u304c\u5bfe\u5fdc\u3057\u305f\u304b<\/td>\n<td>\u500b\u5225\u306e\u63d0\u4f9b\u8005\u3084\u6a5f\u5668\u306e\u5bfe\u5fdc\u72b6\u6cc1\u3092\u5225\u306b\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/td>\n<\/tr>\n<\/tbody>\n<\/table><figcaption>CGPM\u6c7a\u8b705\u3001NICT\u306e\u8aac\u660e\u3001ITU-R\u306e\u73fe\u884c\u52e7\u544a\u3092\u57fa\u306b\u4f5c\u6210\u3002\u6c7a\u5b9a\u4e8b\u9805\u3068\u5b9f\u88c5\u306e\u78ba\u8a8d\u4e8b\u9805\u3092\u5206\u3051\u3066\u3044\u307e\u3059\u3002<\/figcaption><\/figure>\n<h2>\u5730\u7403\u306e\u5411\u304d\u304c\u5fc5\u8981\u306a\u7528\u9014\u306b\u306f\u3001\u5dee\u306e\u60c5\u5831\u3092\u5c4a\u3051\u308b<\/h2>\n<p>UTC\u304c\u9023\u7d9a\u306b\u306a\u3063\u3066\u3082\u3001\u5730\u7403\u306e\u56de\u8ee2\u3092\u57fa\u6e96\u306b\u3057\u305f\u6642\u523b\u3092\u4f7f\u3046\u7528\u9014\u306f\u6b8b\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u3001UTC\u3060\u3051\u304b\u3089UT1\u3092\u8fd1\u4f3c\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001UT1\u2212UTC\u306e\u60c5\u5831\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u6c7a\u8b70\u306f\u3001\u885b\u661f\u6e2c\u4f4d\u30b7\u30b9\u30c6\u30e0\uff08GNSS\uff09\u306e\u822a\u6cd5\u30e1\u30c3\u30bb\u30fc\u30b8\u3084\u3001\u56fd\u969b\u5730\u7403\u56de\u8ee2\u30fb\u57fa\u6e96\u7cfb\u4e8b\u696d\uff08IERS\uff09\u3001\u5404\u56fd\u306e\u8a08\u91cf\u6a5f\u95a2\u306a\u3069\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u3092\u3001\u60c5\u5831\u306e\u5165\u624b\u5148\u3068\u3057\u3066\u6319\u3052\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u7121\u7dda\u3067\u3053\u306e\u5dee\u3092\u4f1d\u3048\u308b\u4ed5\u7d44\u307f\u306b\u306f\u3001\u5225\u306e\u8ab2\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u73fe\u884c\u52e7\u544a\u3067\u306f\u3001UT1\u2212UTC\u306e\u4e88\u6e2c\u5024\u306b\u76f8\u5f53\u3059\u308bDUT1\u3092\u30010.1\u79d2\u523b\u307f\u306e\u5024\u3068\u3057\u3066\u9001\u4fe1\u3059\u308b\u65b9\u6cd5\u304c\u5b9a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u8a31\u5bb9\u3059\u308b\u5dee\u3092\u5e83\u3052\u308b\u306a\u3089\u3001\u53d7\u4fe1\u5074\u304c\u5927\u304d\u306a\u5024\u3092\u6b63\u3057\u304f\u89e3\u91c8\u3067\u304d\u308b\u8868\u73fe\u3082\u5fc5\u8981\u3067\u3059\u3002UTC\u306e\u5909\u66f4\u3092\u6c7a\u8b70\u3059\u308b\u3053\u3068\u3068\u3001\u9001\u53d7\u4fe1\u6a5f\u304c\u6271\u3046\u7b26\u53f7\u3092\u5909\u3048\u308b\u3053\u3068\u306f\u3001\u540c\u6642\u306b\u5b8c\u4e86\u3059\u308b\u4f5c\u696d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>CGPM\u6c7a\u8b70\u304c\u5f15\u7528\u3059\u308b\u7121\u7dda\u5074\u306e\u65b9\u91dd\u306b\u306f\u3001\u65e2\u5b58\u6a5f\u5668\u3092\u65e9\u304f\u4ea4\u63db\u3067\u304d\u306a\u3044\u5834\u5408\u306e\u79fb\u884c\u671f\u9593\u3068\u3057\u30662035\u5e74\u3001\u9045\u304f\u3068\u30822040\u5e74\u3068\u3044\u3046\u5e74\u3082\u767b\u5834\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5897\u5927\u3059\u308b\u6642\u523b\u5dee\u3092\u7121\u7dda\u3067\u4f1d\u3048\u308b\u305f\u3081\u306e\u6a5f\u5668\u30fb\u65b9\u5f0f\u306e\u79fb\u884c\u306b\u95a2\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u9023\u7d9a\u3057\u305fUTC\u306e\u958b\u59cb\u30922040\u5e74\u307e\u3067\u5ef6\u671f\u3059\u308b\u3068\u6c7a\u3081\u305f\u3001\u3068\u3044\u3046\u8aad\u307f\u65b9\u306f\u9069\u5207\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>\u6c7a\u8b70\u3001\u52e7\u544a\u3001\u5b9f\u969b\u306e\u904b\u7528\u3092\u9806\u306b\u78ba\u304b\u3081\u308b<\/h2>\n<p>2026\u5e7410\u670831\u65e5\u306b\u78ba\u8a8d\u3057\u305fITU\u306e\u52e7\u544a\u4e00\u89a7\u3067\u306f\u3001TF.460-6\uff082002\u5e74\u7248\uff09\u304c\u5f15\u304d\u7d9a\u304d\u6709\u52b9\u306a\u7248\u3068\u3057\u3066\u63b2\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002NICT\u306e\u767a\u8868\u3082\u3001\u4eca\u56de\u306e\u6c7a\u5b9a\u3092\u53d7\u3051\u305f\u6539\u5b9a\u306f\u4eca\u5f8c\u9032\u3080\u898b\u8fbc\u307f\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001CGPM\u306e\u6c7a\u5b9a\u3092\u3001\u6539\u5b9a\u6e08\u307f\u306e\u7121\u7dda\u52e7\u544a\u3084\u3001\u500b\u5225\u306e\u6642\u523b\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306e\u5bfe\u5fdc\u5b8c\u4e86\u3068\u7f6e\u304d\u63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