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\nhttps:\/\/qzss.go.jp\/
\nGPS (global positioning system)\u306f\u5c02\u7528\u306e\u4eba\u5de5\u885b\u661f\uff14\u3064\u4ee5\u4e0a\u304b\u3089\u306e\u4fe1\u53f7\u3092\u96c6\u3081\u3066\u305d\u306e\u6642\u9593\u5dee\u304b\u3089\u81ea\u5206\u306e\u4f4d\u7f6e\u3092\u5272\u308a\u51fa\u3059\u4ed5\u7d44\u307f\u3067\u3059\u3002
\n\u3082\u3068\u3082\u3068\u7c73\u8ecd\u306e\u885b\u661f\u306e\u4fe1\u53f7\u3092\u4f7f\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u7c73\u8ecd\u306e\u885b\u661f\u304b\u3089\u306f\u7cbe\u5ea6\u3092\u96a0\u3059\u305f\u3081100m\u304f\u3089\u3044\u306e\u8aa4\u5dee\u3092\u542b\u3093\u3060\u4fe1\u53f7\u304c\u767a\u4fe1\u3055\u308c\u3066\u3044\u3066\u3001\u521d\u671f\u306e\u30ab\u30fc\u30ca\u30d3\u306e\u8868\u793a\u306f\u9053\u8def\u3092\u8d70\u3063\u3066\u3044\u305f\u306e\u306b\u6025\u306b\u5ddd\u306e\u4e2d\u306b\u79fb\u52d5\u3057\u305f\u308a\u3057\u3066\u9762\u767d\u304b\u3063\u305f\u8a18\u61b6\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u3067\u306f\u56f0\u308b\u306e\u3067\u3001\u7c73\u8ecd\u306e\u307b\u304b\u306b\u5404\u56fd\u304cGPS\u7528\u306e\u885b\u661f\u7fa4\u3092\u6253\u3061\u4e0a\u3052\u3066\u3044\u307e\u3059\u3002\u65e5\u672c\u3067\u306f\u300c\u307f\u3061\u3073\u304d\u300d\u3068\u3044\u3046\u540d\u524d\u3067\u3059\u30022010\u5e74\u304b\u3089\u306f\u7c73\u8ecd\u3082\u6b21\u4e16\u4ee3\u306b\u306f\u901a\u5e38\u6642\u306b\u8aa4\u5dee\u3092\u3044\u308c\u308b\u306e\u306f\u3084\u3081\u305f\u305d\u3046\u3067\u3059\u3002
\n\u4eca\u9031\u306f\u3001GPS\u306e\u4ed5\u7d44\u307f\u3068\u5468\u6ce2\u6570\u3001\u4fe1\u53f7\u5f37\u5ea6\u3001\u643a\u5e2f\u96fb\u8a71\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u30c7\u30d0\u30a4\u30b9\u306a\u3069\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u82f1\u8a9e\u306f\u3000https:\/\/en.wikipedia.org\/wiki\/Global_Positioning_System\u3000\u304b\u3089\u3002
\n“It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.”
\nan unobstructed line of sight \u3055\u3048\u304e\u308b\u3082\u306e\u304c\u306a\u3044\u898b\u901a\u3057\u7d4c\u8def
\nline of sight \u8996\u7dda\u3001\u898b\u901a\u3057\u7d4c\u8def<\/p>\n
” It does not require the user to transmit any data, and operates independently of any telephone or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information.”
\ntransmit \u767a\u4fe1\u3059\u308b
\noperates independently of ..\u3000\uff5e\u3068\u72ec\u7acb\u306b\u904b\u7528\u3055\u308c\u308b<\/p>\n
“however, initially this civilian use was limited to an average accuracy of 100 meters (330 ft) by use of Selective Availability (SA), a deliberate error introduced into the GPS data that military receivers could correct for.”
\na deliberate error introduced into the GPS data GPS\u30c7\u30fc\u30bf\u306b\u5c0e\u5165\u3055\u308c\u305f\u6545\u610f\u306e\u4e94\u3055
\nthat military receivers could correct for \u8ecd\u7528\u53d7\u4fe1\u6a5f\u306a\u3089\u3070\u88dc\u6b63\u3067\u304d\u308b<\/p>\n
“The U.S. government controls the export of some civilian receivers. All GPS receivers capable of functioning above 60,000 ft (18 km) above sea level and 1,000 kn (500 m\/s; 2,000 km\/h; 1,000 mph), or designed or modified for use with unmanned missiles and aircraft, are classified as munitions (weapons)\u2014which means they require State Department export licenses.”
\ncontrols the export of some civilian receivers \u6c11\u751f\u7528\u53d7\u4fe1\u6a5f\u306e\u8f38\u51fa\u3092\u898f\u5236\u3057\u3066\u3044\u308b
\ncapable of ~\u304c\u53ef\u80fd\u306a
\nmunitions \u30df\u30e5\u300c\u30cb\u300d\u30b7\u30e7\u30f3\u30ba\u3000\u6b66\u5668
\nState Department \u56fd\u52d9\u7701\uff08\uff1d\u7c73\u56fd\u306e\u5916\u52d9\u7701\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
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