{"id":677,"date":"2025-12-19T00:53:27","date_gmt":"2025-12-18T16:53:27","guid":{"rendered":"https:\/\/hsiang.cc\/?p=677"},"modified":"2025-12-19T00:54:20","modified_gmt":"2025-12-18T16:54:20","slug":"gnss%e7%ad%86%e8%a8%98%e6%98%9f%e6%9b%86%e8%88%87%e5%b9%b4%e6%9b%86%ef%bc%9a%e8%a1%9b%e6%98%9f%e7%9a%84%e5%85%a9%e7%a8%ae%e8%bb%8c%e9%81%93%e5%8f%83%e6%95%b8","status":"publish","type":"post","link":"https:\/\/hsiang.cc\/?p=677","title":{"rendered":"[GNSS\u7b46\u8a18]\u661f\u66c6\u8207\u5e74\u66c6\uff1a\u885b\u661f\u7684\u5169\u7a2e\u8ecc\u9053\u53c3\u6578"},"content":{"rendered":"<p>\u70ba\u4ec0\u9ebcGPS\u6709\u6642\u5019\u79d2\u5b9a\u4f4d\uff0c\u6709\u6642\u5019\u8981\u7b49\u597d\u5e7e\u5206\u9418\uff1f\u95dc\u9375\u5c31\u5728\u300c\u661f\u66c6\u300d\u548c\u300c\u5e74\u66c6\u300d\uff01<\/p>\n<hr \/>\n<h2>\ud83d\udce1 \u4ec0\u9ebc\u662f\u661f\u66c6\uff08Ephemeris\uff09\uff1f<\/h2>\n<h3>\u57fa\u672c\u5b9a\u7fa9<\/h3>\n<p>\u661f\u66c6\u662f\u63cf\u8ff0<strong>\u55ae\u9846\u885b\u661f<\/strong>\u5728<strong>\u7279\u5b9a\u6642\u9593\u6bb5\u5167<\/strong>\u7684<strong>\u7cbe\u78ba\u8ecc\u9053\u53c3\u6578<\/strong>\u3002<\/p>\n<p><strong>\u7c21\u55ae\u6bd4\u55bb<\/strong>\uff1a\u5c31\u50cf\u98db\u6a5f\u7684\u300c\u5373\u6642\u98db\u884c\u8a08\u5283\u300d\uff0c\u544a\u8a34\u4f60\u9019\u67b6\u98db\u6a5f\u73fe\u5728\u7cbe\u78ba\u5728\u54ea\u88e1\u3001\u5f80\u54ea\u98db\u3001\u901f\u5ea6\u591a\u5feb\u3002<\/p>\n<h3>\u5305\u542b\u54ea\u4e9b\u8cc7\u8a0a\uff1f<\/h3>\n<ul>\n<li>\ud83d\udef0\ufe0f \u885b\u661f\u7684\u7cbe\u78ba\u4f4d\u7f6e\u5ea7\u6a19<\/li>\n<li>\ud83d\udccd \u885b\u661f\u7684\u904b\u884c\u901f\u5ea6\u548c\u65b9\u5411<\/li>\n<li>\u23f0 \u885b\u661f\u6642\u9418\u7684\u4fee\u6b63\u53c3\u6578<\/li>\n<li>\ud83d\udd27 \u8ecc\u9053\u651d\u52d5\u4fee\u6b63\u6578\u64da<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<h3>\u6838\u5fc3\u7279\u6027<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u7279\u6027<\/th>\n<th>\u8aaa\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u7cbe\u5ea6<\/strong><\/td>\n<td>\u7c73\u7d1a\uff081-5\u516c\u5c3a\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7bc4\u570d<\/strong><\/td>\n<td>\u53ea\u63cf\u8ff0\u55ae\u9846\u885b\u661f<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6709\u6548\u671f<\/strong><\/td>\n<td>2-4\u5c0f\u6642<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6a94\u6848\u5927\u5c0f<\/strong><\/td>\n<td>~100-200 bytes\/\u9846<\/td>\n<\/tr>\n<tr>\n<td><strong>\u66f4\u65b0\u983b\u7387<\/strong><\/td>\n<td>\u6bcf30\u5206\u9418\u5ee3\u64ad\u4e00\u6b21<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7528\u9014<\/strong><\/td>\n<td>\u7cbe\u78ba\u5b9a\u4f4d\u8a08\u7b97<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u70ba\u4ec0\u9ebc\u9700\u8981\u661f\u66c6\uff1f<\/h3>\n<p>GPS\u5b9a\u4f4d\u7684\u539f\u7406\u662f<strong>\u6e2c\u8ddd<\/strong>\uff1a<\/p>\n<ol>\n<li>\u6e2c\u91cf\u4f60\u5230\u591a\u9846\u885b\u661f\u7684\u8ddd\u96e2<\/li>\n<li>\u8981\u6e2c\u8ddd\uff0c\u5fc5\u9808\u77e5\u9053\u885b\u661f\u7684\u7cbe\u78ba\u4f4d\u7f6e<\/li>\n<li><strong>\u6c92\u6709\u7cbe\u78ba\u661f\u66c6 = \u7121\u6cd5\u7cbe\u78ba\u5b9a\u4f4d<\/strong><\/li>\n<\/ol>\n<h3>\u70ba\u4ec0\u9ebc\u6709\u6548\u671f\u9019\u9ebc\u77ed\uff1f<\/h3>\n<p>\u885b\u661f\u8ecc\u9053\u4e26\u975e\u5b8c\u5168\u7a69\u5b9a\uff0c\u6703\u53d7\u5230\uff1a<\/p>\n<ul>\n<li>\u2600\ufe0f \u592a\u967d\u8f3b\u5c04\u58d3\u529b<\/li>\n<li>\ud83c\udf0d \u5730\u7403\u5f15\u529b\u4e0d\u5747\uff08\u5730\u7403\u4e0d\u662f\u5b8c\u7f8e\u7403\u9ad4\uff09<\/li>\n<li>\ud83c\udf19 \u6708\u7403\u5f15\u529b\u5f71\u97ff<\/li>\n<li>\ud83d\udca8 \u6975\u7a00\u8584\u7684\u9ad8\u5c64\u5927\u6c23\u963b\u529b<\/li>\n<li>\u23f1\ufe0f \u885b\u661f\u6642\u9418\u6f02\u79fb<\/li>\n<\/ul>\n<p><strong>\u7d50\u679c<\/strong>\uff1a<\/p>\n<ul>\n<li>\u6bcf\u5c0f\u6642\u504f\u79fb\uff1a\u6578\u516c\u5c3a\u5230\u6578\u5341\u516c\u5c3a<\/li>\n<li>4\u5c0f\u6642\u5f8c\u504f\u79fb\uff1a\u53ef\u9054100\u516c\u5c3a\u4ee5\u4e0a<\/li>\n<li>24\u5c0f\u6642\u5f8c\u504f\u79fb\uff1a\u53ef\u9054\u6578\u516c\u91cc<\/li>\n<\/ul>\n<p>\u56e0\u6b64\u9700\u8981\u983b\u7e41\u66f4\u65b0\u4ee5\u7dad\u6301\u7cbe\u5ea6\u3002<\/p>\n<h3>\u5f9e\u54ea\u88e1\u4e0b\u8f09\u661f\u66c6\uff1f<\/h3>\n<h4>\u65b9\u5f0f1\uff1a\u5f9e\u885b\u661f\u5ee3\u64ad\uff08\u50b3\u7d71\uff09<\/h4>\n<ul>\n<li><strong>\u4f86\u6e90<\/strong>\uff1a\u6b63\u5728\u8ffd\u8e64\u7684\u885b\u661f\u672c\u8eab<\/li>\n<li><strong>\u6642\u9593<\/strong>\uff1a30\u79d2\/\u9846\u885b\u661f<\/li>\n<li><strong>\u7279\u9ede<\/strong>\uff1a\u514d\u8cbb\u3001\u4e0d\u9700\u7db2\u8def\u3001\u4f46\u8f03\u6162<\/li>\n<li><strong>\u6ce8\u610f<\/strong>\uff1a\u6bcf\u9846\u885b\u661f\u53ea\u5ee3\u64ad\u81ea\u5df1\u7684\u661f\u66c6<\/li>\n<\/ul>\n<h4>\u65b9\u5f0f2\uff1a\u5f9e\u7db2\u8def\u4e0b\u8f09\uff08A-GPS\uff09<\/h4>\n<ul>\n<li><strong>\u4f86\u6e90<\/strong>\uff1a\u5b9a\u4f4d\u670d\u52d9\u5668\n<ul>\n<li>Apple\uff1aiOS\u8a2d\u5099<\/li>\n<li>Google\uff1aAndroid\u8a2d\u5099<\/li>\n<li>\u9ad8\u901aXTRA\uff1a\u8a31\u591aAndroid\u624b\u6a5f<\/li>\n<li>\u806f\u767c\u79d1EPO\uff1a\u806f\u767c\u79d1\u6676\u7247<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6642\u9593<\/strong>\uff1a2-5\u79d2<\/li>\n<li><strong>\u6a94\u6848<\/strong>\uff1a5-10 KB\uff08\u591a\u9846\u885b\u661f\uff09<\/li>\n<li><strong>\u7279\u9ede<\/strong>\uff1a\u5feb\u901f\u3001\u9700\u8981\u7db2\u8def\u9023\u63a5<\/li>\n<\/ul>\n<h4>\u65b9\u5f0f3\uff1a\u5c08\u696d\u6578\u64da\u4e2d\u5fc3\uff08\u79d1\u7814\uff09<\/h4>\n<ul>\n<li><strong>\u4f86\u6e90<\/strong>\uff1aIGS\u3001NASA\u7b49\u6a5f\u69cb<\/li>\n<li><strong>\u7cbe\u5ea6<\/strong>\uff1a\u91d0\u7c73\u7d1a\uff08\u7cbe\u5bc6\u661f\u66c6\uff09<\/li>\n<li><strong>\u7528\u9014<\/strong>\uff1a\u9ad8\u7cbe\u5ea6\u6e2c\u91cf\u3001\u79d1\u5b78\u7814\u7a76<\/li>\n<\/ul>\n<h3>\u661f\u66c6\u6a94\u6848\u5927\u5c0f<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u7cfb\u7d71<\/th>\n<th>\u55ae\u9846\u885b\u661f<\/th>\n<th>\u5b8c\u6574\u661f\u5ea7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>GPS<\/td>\n<td>~216 bytes<\/td>\n<td>~7 KB\uff0832\u9846\uff09<\/td>\n<\/tr>\n<tr>\n<td>GLONASS<\/td>\n<td>~60 bytes<\/td>\n<td>~1.5 KB\uff0824\u9846\uff09<\/td>\n<\/tr>\n<tr>\n<td>Galileo<\/td>\n<td>~150 bytes<\/td>\n<td>~4.5 KB\uff0830\u9846\uff09<\/td>\n<\/tr>\n<tr>\n<td>BeiDou<\/td>\n<td>~100 bytes<\/td>\n<td>~3.5 KB\uff0835\u9846\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u66f4\u65b0\u7b56\u7565<\/h3>\n<p><strong>\u6301\u7e8c\u4f7f\u7528<\/strong>\uff08\u5982\u8eca\u8f09\u5c0e\u822a\uff09\uff1a<\/p>\n<ul>\n<li>\u81ea\u52d5\u6bcf30\u5206\u9418\u63a5\u6536\u65b0\u661f\u66c6<\/li>\n<li>\u7528\u6236\u5b8c\u5168\u7121\u611f\u77e5<\/li>\n<\/ul>\n<p><strong>\u9593\u6b47\u4f7f\u7528<\/strong>\uff08\u5982\u624b\u6a5fGPS\uff09\uff1a<\/p>\n<ul>\n<li>\u958b\u6a5f\u6642\u6aa2\u67e5\u661f\u66c6\u6642\u9593<\/li>\n<li>\u8d85\u904e2\u5c0f\u6642\u5247\u91cd\u65b0\u4e0b\u8f09<\/li>\n<li>\u901a\u904eA-GPS\u5e7e\u79d2\u5b8c\u6210<\/li>\n<\/ul>\n<p><strong>\u5c08\u696d\u6e2c\u91cf<\/strong>\uff1a<\/p>\n<ul>\n<li>\u6bcf\u5c0f\u6642\u66f4\u65b0<\/li>\n<li>\u6216\u4f7f\u7528\u4e8b\u5f8c\u7cbe\u5bc6\u661f\u66c6<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83d\udcc5 \u4ec0\u9ebc\u662f\u5e74\u66c6\uff08Almanac\uff09\uff1f<\/h2>\n<h3>\u57fa\u672c\u5b9a\u7fa9<\/h3>\n<p>\u5e74\u66c6\u662f\u63cf\u8ff0<strong>\u6574\u500b\u885b\u661f\u661f\u5ea7<\/strong>\u7684<strong>\u9577\u671f\u6982\u7565\u8ecc\u9053\u53c3\u6578<\/strong>\u3002<\/p>\n<p><strong>\u7c21\u55ae\u6bd4\u55bb<\/strong>\uff1a\u5c31\u50cf\u822a\u7a7a\u516c\u53f8\u7684\u300c\u822a\u73ed\u6642\u523b\u8868\u300d\uff0c\u544a\u8a34\u4f60\u5927\u6982\u4ec0\u9ebc\u6642\u5019\u6703\u6709\u98db\u6a5f\u7d93\u904e\u9019\u500b\u5340\u57df\uff0c\u4f46\u4e0d\u6703\u7cbe\u78ba\u5230\u79d2\u3002<\/p>\n<h3>\u5305\u542b\u54ea\u4e9b\u8cc7\u8a0a\uff1f<\/h3>\n<ul>\n<li>\ud83c\udf10 \u6240\u6709\u885b\u661f\u7684\u5927\u81f4\u8ecc\u9053\u4fe1\u606f<\/li>\n<li>\ud83d\udc9a \u885b\u661f\u7684\u5065\u5eb7\u72c0\u614b<\/li>\n<li>\ud83d\udc41\ufe0f \u885b\u661f\u7684\u53ef\u898b\u6027\u9810\u5831<\/li>\n<li>\ud83d\udcca \u7c21\u5316\u7684\u8ecc\u9053\u6a21\u578b<\/li>\n<\/ul>\n<h3>\u6838\u5fc3\u7279\u6027<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u7279\u6027<\/th>\n<th>\u8aaa\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u7cbe\u5ea6<\/strong><\/td>\n<td>\u516c\u91cc\u7d1a\uff08\u6578\u516c\u91cc\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7bc4\u570d<\/strong><\/td>\n<td>\u6db5\u84cb\u6240\u6709\u885b\u661f<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6709\u6548\u671f<\/strong><\/td>\n<td>30-180\u5929<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6a94\u6848\u5927\u5c0f<\/strong><\/td>\n<td>~15 KB\/\u5b8c\u6574\u661f\u5ea7<\/td>\n<\/tr>\n<tr>\n<td><strong>\u66f4\u65b0\u983b\u7387<\/strong><\/td>\n<td>\u6bcf\u9031\/\u6bcf\u6708<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7528\u9014<\/strong><\/td>\n<td>\u5feb\u901f\u641c\u661f\u3001\u885b\u661f\u9810\u5831<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u70ba\u4ec0\u9ebc\u9700\u8981\u5e74\u66c6\uff1f<\/h3>\n<p>\u60f3\u50cf\u6c92\u6709\u5e74\u66c6\u7684\u60c5\u6cc1\uff1a<\/p>\n<ol>\n<li>\u274c \u63a5\u6536\u6a5f\u4e0d\u77e5\u9053\u54ea\u4e9b\u885b\u661f\u5728\u5929\u7a7a\u4e2d<\/li>\n<li>\u274c \u9700\u8981\u76f2\u76ee\u641c\u7d22\u6240\u6709\u53ef\u80fd\u7684\u885b\u661f\uff0832\u9846GPS\uff09<\/li>\n<li>\u274c \u6bcf\u9846\u90fd\u8981\u5617\u8a66\u9396\u5b9a\uff0c\u6d6a\u8cbb\u5927\u91cf\u6642\u9593<\/li>\n<\/ol>\n<p><strong>\u6709\u4e86\u5e74\u66c6<\/strong>\uff1a<\/p>\n<ol>\n<li>\u2705 \u6839\u64da\u7576\u524d\u6642\u9593\u548c\u4f4d\u7f6e<\/li>\n<li>\u2705 \u5feb\u901f\u8a08\u7b97\u51fa\u54ea\u4e9b\u885b\u661f\u53ef\u898b<\/li>\n<li>\u2705 \u76f4\u63a5\u9396\u5b9a\u9019\u4e9b\u885b\u661f\uff0c\u7bc0\u7701\u6642\u9593<\/li>\n<\/ol>\n<h3>\u70ba\u4ec0\u9ebc\u6709\u6548\u671f\u9019\u9ebc\u9577\uff1f<\/h3>\n<p>\u56e0\u70ba\u5e74\u66c6\u4f7f\u7528<strong>\u7c21\u5316\u7684\u8ecc\u9053\u6a21\u578b<\/strong>\uff1a<\/p>\n<ul>\n<li>\u53ea\u63cf\u8ff0\u885b\u661f\u7684\u5927\u81f4\u904b\u884c\u898f\u5f8b<\/li>\n<li>\u5ffd\u7565\u77ed\u671f\u7684\u8ecc\u9053\u64fe\u52d5<\/li>\n<li>\u5c0d\u5fae\u5c0f\u8b8a\u5316\u4e0d\u654f\u611f<\/li>\n<\/ul>\n<p><strong>\u885b\u661f\u8ecc\u9053\u7684\u9577\u671f\u7a69\u5b9a\u6027<\/strong>\uff1a<\/p>\n<ul>\n<li>\u4e3b\u8981\u53c3\u6578\uff08\u9031\u671f\u3001\u50be\u89d2\u7b49\uff09\u5e7e\u4e4e\u4e0d\u8b8a<\/li>\n<li>\u53ea\u6709\u76f8\u4f4d\u6703\u6301\u7e8c\u8b8a\u5316<\/li>\n<li>\u9577\u671f\u8da8\u52e2\u8b8a\u5316\u7de9\u6162<\/li>\n<\/ul>\n<p>\u5c31\u50cf\u6c23\u5019\u7d71\u8a08\u6578\u64da\u53ef\u4ee5\u7528\u5f88\u4e45\uff0c\u4f46\u5929\u6c23\u9810\u5831\u53ea\u80fd\u7528\u5e7e\u5929\u3002<\/p>\n<h3>\u5f9e\u54ea\u88e1\u4e0b\u8f09\u5e74\u66c6\uff1f<\/h3>\n<h4>\u65b9\u5f0f1\uff1a\u5f9e\u885b\u661f\u5ee3\u64ad\uff08\u50b3\u7d71\uff09<\/h4>\n<ul>\n<li><strong>\u4f86\u6e90<\/strong>\uff1a\u4efb\u4f55\u4e00\u9846GNSS\u885b\u661f<\/li>\n<li><strong>\u6642\u9593<\/strong>\uff1a12.5\u5206\u9418\uff08\u5b8c\u6574\u5e74\u66c6\uff09<\/li>\n<li><strong>\u7279\u9ede<\/strong>\uff1a\n<ul>\n<li>\u4efb\u4f55\u885b\u661f\u90fd\u5ee3\u64ad\u5b8c\u6574\u661f\u5ea7\u7684\u5e74\u66c6<\/li>\n<li>\u5305\u542b\u6240\u6709\u885b\u661f\u7684\u6982\u7565\u8ecc\u9053<\/li>\n<li>\u4f46\u5be6\u969b\u4e0a<strong>2-3\u5206\u9418<\/strong>\u5c31\u80fd\u63a5\u6536\u5230\u8db3\u5920\u8cc7\u8a0a\u958b\u59cb\u5de5\u4f5c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>\u70ba\u4ec0\u9ebc\u662f12.5\u5206\u9418\uff1f<\/strong><\/p>\n<ul>\n<li>\u5e74\u66c6\u5305\u542b25\u500b\u9801\u9762<\/li>\n<li>\u6bcf\u980130\u79d2<\/li>\n<li>25 \u00d7 30\u79d2 = 750\u79d2 = 12.5\u5206\u9418<\/li>\n<li>\u4f46\u4e0d\u9700\u8981\u7b49\u5b8c\u6574\u4e0b\u8f09\u5c31\u80fd\u958b\u59cb\u5b9a\u4f4d\uff01<\/li>\n<\/ul>\n<h4>\u65b9\u5f0f2\uff1a\u5f9e\u7db2\u8def\u4e0b\u8f09\uff08A-GPS\uff09<\/h4>\n<ul>\n<li><strong>\u4f86\u6e90<\/strong>\uff1a\u5b9a\u4f4d\u670d\u52d9\u5668<\/li>\n<li><strong>\u6642\u9593<\/strong>\uff1a1-2\u79d2<\/li>\n<li><strong>\u6a94\u6848<\/strong>\uff1a10-20 KB<\/li>\n<li><strong>\u7279\u9ede<\/strong>\uff1a\u5feb\u901f\u7372\u53d6\u5b8c\u6574\u5e74\u66c6<\/li>\n<\/ul>\n<h4>\u65b9\u5f0f3\uff1a\u5f9e\u8a2d\u5099\u8a18\u61b6\u9ad4\u8b80\u53d6<\/h4>\n<ul>\n<li><strong>\u4f86\u6e90<\/strong>\uff1a\u63a5\u6536\u6a5f\u5167\u90e8\u5132\u5b58<\/li>\n<li><strong>\u689d\u4ef6<\/strong>\uff1a\u4e0a\u6b21\u4e0b\u8f09\u7684\u5e74\u66c6\u9084\u5728\u6709\u6548\u671f\u5167<\/li>\n<li><strong>\u6642\u9593<\/strong>\uff1a\u77ac\u9593<\/li>\n<li><strong>\u9019\u5c31\u662f\u70ba\u4ec0\u9ebc\u6709\u6642GPS\u555f\u52d5\u5f88\u5feb\uff01<\/strong><\/li>\n<\/ul>\n<h3>\u5e74\u66c6\u6a94\u6848\u5927\u5c0f<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u7cfb\u7d71<\/th>\n<th>\u5b8c\u6574\u5e74\u66c6\u5927\u5c0f<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>GPS<\/td>\n<td>~15 KB\uff0832\u9846\u885b\u661f\uff09<\/td>\n<\/tr>\n<tr>\n<td>GLONASS<\/td>\n<td>~12 KB\uff0824\u9846\u885b\u661f\uff09<\/td>\n<\/tr>\n<tr>\n<td>Galileo<\/td>\n<td>~20 KB\uff0830\u9846\u885b\u661f\uff09<\/td>\n<\/tr>\n<tr>\n<td>BeiDou<\/td>\n<td>~18 KB\uff0835\u9846\u885b\u661f\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u591a\u7cfb\u7d71\u7e3d\u8a08<\/strong><\/td>\n<td><strong>~65 KB<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u66f4\u65b0\u7b56\u7565<\/h3>\n<p><strong>\u81ea\u52d5\u66f4\u65b0<\/strong>\uff08\u73fe\u4ee3\u8a2d\u5099\uff09\uff1a<\/p>\n<ul>\n<li>\u6bcf\u9031\u901a\u904e\u7db2\u8def\u81ea\u52d5\u66f4\u65b0<\/li>\n<li>\u80cc\u666f\u4e0b\u8f09\uff0c\u7528\u6236\u7121\u611f\u77e5<\/li>\n<\/ul>\n<p><strong>\u624b\u52d5\u66f4\u65b0<\/strong>\uff08\u50b3\u7d71\u8a2d\u5099\uff09\uff1a<\/p>\n<ul>\n<li>\u9577\u6642\u9593\u672a\u4f7f\u7528\u5f8c<\/li>\n<li>\u9996\u6b21\u958b\u6a5f\u7b49\u5f85\u63a5\u6536<\/li>\n<\/ul>\n<p><strong>\u904e\u671f\u5f71\u97ff<\/strong>\uff1a<\/p>\n<ul>\n<li>\u274c \u9996\u6b21\u5b9a\u4f4d\u6642\u9593\u8b8a\u9577<\/li>\n<li>\u274c \u641c\u661f\u6548\u7387\u4e0b\u964d<\/li>\n<li>\u2705 \u4f46\u4e0d\u5f71\u97ff\u6700\u7d42\u5b9a\u4f4d\u7cbe\u5ea6<\/li>\n<li>\u2705 \u9396\u5b9a\u885b\u661f\u5f8c\u4f7f\u7528\u661f\u66c6\u5b9a\u4f4d<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83d\udd04 \u661f\u66c6 vs \u5e74\u66c6\uff1a\u6838\u5fc3\u5dee\u7570<\/h2>\n<h3>\u4e00\u53e5\u8a71\u7e3d\u7d50<\/h3>\n<ul>\n<li><strong>\u661f\u66c6<\/strong> = \u55ae\u9846\u885b\u661f\u7684\u300c\u7cbe\u78ba\u5373\u6642\u4f4d\u7f6e\u300d\uff08\u7c73\u7d1a\u7cbe\u5ea6\uff0c\u5e7e\u5c0f\u6642\u6709\u6548\uff09<\/li>\n<li><strong>\u5e74\u66c6<\/strong> = \u6240\u6709\u885b\u661f\u7684\u300c\u5927\u6982\u4f4d\u7f6e\u8868\u300d\uff08\u516c\u91cc\u7d1a\u7cbe\u5ea6\uff0c\u5e7e\u500b\u6708\u6709\u6548\uff09<\/li>\n<\/ul>\n<h3>\u5b8c\u6574\u5c0d\u6bd4\u8868<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u9805\u76ee<\/th>\n<th>\u661f\u66c6\uff08Ephemeris\uff09<\/th>\n<th>\u5e74\u66c6\uff08Almanac\uff09<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u7cbe\u5ea6<\/strong><\/td>\n<td>\u7c73\u7d1a\uff081-5\u516c\u5c3a\uff09<\/td>\n<td>\u516c\u91cc\u7d1a\uff08\u6578\u516c\u91cc\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7bc4\u570d<\/strong><\/td>\n<td>\u55ae\u9846\u885b\u661f<\/td>\n<td>\u5168\u90e8\u885b\u661f<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6a94\u6848\u5927\u5c0f<\/strong><\/td>\n<td>~100 bytes\/\u9846<\/td>\n<td>~15 KB\/\u5b8c\u6574\u7cfb\u7d71<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6709\u6548\u671f<\/strong><\/td>\n<td>2-4\u5c0f\u6642<\/td>\n<td>30-180\u5929<\/td>\n<\/tr>\n<tr>\n<td><strong>\u66f4\u65b0\u983b\u7387<\/strong><\/td>\n<td>\u6bcf30\u5206\u9418<\/td>\n<td>\u6bcf\u9031\/\u6bcf\u6708<\/td>\n<\/tr>\n<tr>\n<td><strong>\u885b\u661f\u4e0b\u8f09\u6642\u9593<\/strong><\/td>\n<td>30\u79d2\/\u9846<\/td>\n<td>12.5\u5206\u9418\uff08\u5b8c\u6574\uff09<br \/>2-3\u5206\u9418\uff08\u53ef\u7528\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7db2\u8def\u4e0b\u8f09\u6642\u9593<\/strong><\/td>\n<td>2-5\u79d2<\/td>\n<td>1-2\u79d2<\/td>\n<\/tr>\n<tr>\n<td><strong>\u4e3b\u8981\u7528\u9014<\/strong><\/td>\n<td>\u7cbe\u78ba\u5b9a\u4f4d\u8a08\u7b97<\/td>\n<td>\u5feb\u901f\u641c\u661f\u9810\u5831<\/td>\n<\/tr>\n<tr>\n<td><strong>\u904e\u671f\u5f71\u97ff<\/strong><\/td>\n<td>\u5b9a\u4f4d\u7cbe\u5ea6\u4e0b\u964d<\/td>\n<td>\u641c\u661f\u901f\u5ea6\u8b8a\u6162<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u6bd4\u55bb\u5c0d\u7167<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u6982\u5ff5<\/th>\n<th>\u661f\u66c6<\/th>\n<th>\u5e74\u66c6<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5929\u6c23<\/td>\n<td>\u4eca\u65e5\u5929\u6c23\u9810\u5831<\/td>\n<td>\u6c23\u5019\u7d71\u8a08\u8cc7\u6599<\/td>\n<\/tr>\n<tr>\n<td>\u5730\u5716<\/td>\n<td>\u5373\u6642\u5c0e\u822a<\/td>\n<td>\u5730\u5716\u7d22\u5f15<\/td>\n<\/tr>\n<tr>\n<td>\u822a\u7a7a<\/td>\n<td>\u5373\u6642\u98db\u884c\u8a08\u5283<\/td>\n<td>\u822a\u73ed\u6642\u523b\u8868<\/td>\n<\/tr>\n<tr>\n<td>\u7279\u6027<\/td>\n<td>\u7cbe\u78ba\u4f46\u77ed\u6548<\/td>\n<td>\u7c97\u7565\u4f46\u9577\u6548<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>\ud83d\ude80 \u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n<h3>\u5834\u666f1\uff1a\u51b7\u555f\u52d5\uff08Cold Start\uff09<\/h3>\n<p><strong>\u60c5\u6cc1<\/strong>\uff1a\u6c92\u6709\u4efb\u4f55\u6709\u6548\u6578\u64da<\/p>\n<ul>\n<li>\u65b0\u8a2d\u5099\u9996\u6b21\u4f7f\u7528<\/li>\n<li>\u9577\u671f\u672a\u4f7f\u7528\uff08\u6578\u6708\uff09<\/li>\n<li>\u8de8\u570b\u65c5\u884c<\/li>\n<li>\u8a2d\u5099\u88ab\u91cd\u7f6e<\/li>\n<\/ul>\n<h4>\u50b3\u7d71\u65b9\u5f0f\uff08\u5f9e\u885b\u661f\u63a5\u6536\uff09<\/h4>\n<ol>\n<li>\u23f3 \u641c\u5c0b\u885b\u661f\u4fe1\u865f\uff1a1-2\u5206\u9418<\/li>\n<li>\u23f3 \u63a5\u6536\u5e74\u66c6\uff08\u90e8\u5206\uff09\uff1a2-3\u5206\u9418<\/li>\n<li>\u23f3 \u63a5\u6536\u661f\u66c6\uff084\u9846\uff09\uff1a2\u5206\u9418<\/li>\n<li>\u2705 \u958b\u59cb\u5b9a\u4f4d<\/li>\n<\/ol>\n<p><strong>\u7e3d\u6642\u9593<\/strong>\uff1a\u7d04 <strong>5-7\u5206\u9418<\/strong><\/p>\n<h4>A-GPS\u65b9\u5f0f\uff08\u5f9e\u7db2\u8def\u4e0b\u8f09\uff09<\/h4>\n<ol>\n<li>\ud83d\udcf6 \u4e0b\u8f09\u5e74\u66c6\uff1a1-2\u79d2<\/li>\n<li>\ud83d\udcf6 \u4e0b\u8f09\u661f\u66c6\uff1a2-5\u79d2<\/li>\n<li>\ud83d\udd0d \u9396\u5b9a\u885b\u661f\uff1a5-10\u79d2<\/li>\n<li>\u2705 \u958b\u59cb\u5b9a\u4f4d<\/li>\n<\/ol>\n<p><strong>\u7e3d\u6642\u9593<\/strong>\uff1a\u7d04 <strong>10-20\u79d2<\/strong><\/p>\n<h3>\u5834\u666f2\uff1a\u71b1\u555f\u52d5\uff08Hot Start\uff09<\/h3>\n<p><strong>\u60c5\u6cc1<\/strong>\uff1a\u6709\u6709\u6548\u7684\u661f\u66c6\u548c\u5e74\u66c6<\/p>\n<ul>\n<li>\u525b\u4f7f\u7528\u904eGPS\uff08\u5e7e\u5206\u9418\u5167\uff09<\/li>\n<li>\u661f\u66c6\u548c\u5e74\u66c6\u90fd\u9084\u6709\u6548<\/li>\n<\/ul>\n<p><strong>\u6b65\u9a5f<\/strong>\uff1a<\/p>\n<ol>\n<li>\ud83d\udcd6 \u8b80\u53d6\u5e74\u66c6\uff0c\u5feb\u901f\u5224\u65b7\u53ef\u898b\u885b\u661f<\/li>\n<li>\ud83d\udd0d \u9396\u5b9a\u9019\u4e9b\u885b\u661f\u4fe1\u865f<\/li>\n<li>\ud83d\udcca \u4f7f\u7528\u5df2\u6709\u661f\u66c6\u8a08\u7b97\u4f4d\u7f6e<\/li>\n<li>\u2705 \u958b\u59cb\u5b9a\u4f4d<\/li>\n<\/ol>\n<p><strong>\u7e3d\u6642\u9593<\/strong>\uff1a\u7d04 <strong>5-30\u79d2<\/strong><\/p>\n<h3>\u5834\u666f3\uff1a\u6eab\u555f\u52d5\uff08Warm Start\uff09<\/h3>\n<p><strong>\u60c5\u6cc1<\/strong>\uff1a\u6709\u5e74\u66c6\u4f46\u661f\u66c6\u904e\u671f<\/p>\n<ul>\n<li>\u5e7e\u5c0f\u6642\u524d\u4f7f\u7528\u904e<\/li>\n<li>\u5e74\u66c6\u9084\u6709\u6548\uff0c\u4f46\u661f\u66c6\u5df2\u904e\u671f<\/li>\n<\/ul>\n<p><strong>\u6b65\u9a5f<\/strong>\uff1a<\/p>\n<ol>\n<li>\ud83d\udcd6 \u4f7f\u7528\u5e74\u66c6\u5feb\u901f\u627e\u5230\u885b\u661f<\/li>\n<li>\u23f3 \u91cd\u65b0\u63a5\u6536\u661f\u66c6\uff0830\u79d2\u00d74\u9846\uff09<\/li>\n<li>\u2705 \u958b\u59cb\u5b9a\u4f4d<\/li>\n<\/ol>\n<p><strong>\u7e3d\u6642\u9593<\/strong>\uff1a\u7d04 <strong>1-2\u5206\u9418<\/strong><\/p>\n<h3>\u5169\u8005\u5982\u4f55\u914d\u5408\u5de5\u4f5c\uff1f<\/h3>\n<pre><code>\u958b\u6a5f \u2192 \u8b80\u53d6\u5e74\u66c6 \u2192 \u5feb\u901f\u627e\u5230\u53ef\u898b\u885b\u661f\n              \u2193\n          \u9396\u5b9a\u885b\u661f\u4fe1\u865f\n              \u2193\n          \u63a5\u6536\/\u8b80\u53d6\u661f\u66c6\n              \u2193\n          \u7cbe\u78ba\u8a08\u7b97\u4f4d\u7f6e\n              \u2193\n            \u958b\u59cb\u5b9a\u4f4d<\/code><\/pre>\n<p><strong>\u95dc\u9375<\/strong>\uff1a<\/p>\n<ul>\n<li>\u5e74\u66c6\u8ca0\u8cac\u300c\u627e\u661f\u300d\uff08\u5feb\u901f\u5b9a\u4f4d\u54ea\u4e9b\u885b\u661f\u53ef\u898b\uff09<\/li>\n<li>\u661f\u66c6\u8ca0\u8cac\u300c\u5b9a\u4f4d\u300d\uff08\u7cbe\u78ba\u8a08\u7b97\u4f60\u7684\u4f4d\u7f6e\uff09<\/li>\n<li>\u5169\u8005\u7f3a\u4e00\u4e0d\u53ef\uff01<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83c\udf0d \u6240\u6709GNSS\u7cfb\u7d71\u90fd\u6709\u55ce\uff1f<\/h2>\n<p><strong>\u662f\u7684\uff01<\/strong> \u9019\u662f\u6240\u6709\u885b\u661f\u5c0e\u822a\u7cfb\u7d71\u7684\u57fa\u672c\u8a2d\u8a08\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7cfb\u7d71<\/th>\n<th>\u570b\u5bb6\/\u5730\u5340<\/th>\n<th>\u661f\u66c6\u8853\u8a9e<\/th>\n<th>\u5e74\u66c6\u8853\u8a9e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>GPS<\/strong><\/td>\n<td>\u7f8e\u570b<\/td>\n<td>Ephemeris<\/td>\n<td>Almanac<\/td>\n<\/tr>\n<tr>\n<td><strong>GLONASS<\/strong><\/td>\n<td>\u4fc4\u7f85\u65af<\/td>\n<td>Ephemeris<\/td>\n<td>Almanac<\/td>\n<\/tr>\n<tr>\n<td><strong>Galileo<\/strong><\/td>\n<td>\u6b50\u76df<\/td>\n<td>Ephemeris<\/td>\n<td>Almanac<\/td>\n<\/tr>\n<tr>\n<td><strong>BeiDou<\/strong><\/td>\n<td>\u4e2d\u570b<\/td>\n<td>\u661f\u66c6<\/td>\n<td>\u66c6\u66f8<\/td>\n<\/tr>\n<tr>\n<td><strong>QZSS<\/strong><\/td>\n<td>\u65e5\u672c<\/td>\n<td>Ephemeris<\/td>\n<td>Almanac<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u70ba\u4ec0\u9ebc\u90fd\u9700\u8981\uff1f<\/h3>\n<p>\u56e0\u70ba\u9019\u662f\u885b\u661f\u5c0e\u822a\u7684<strong>\u57fa\u672c\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a<\/p>\n<ol>\n<li>\u63a5\u6536\u6a5f\u9700\u8981\u77e5\u9053\u885b\u661f\u5728\u54ea\u88e1<\/li>\n<li>\u7cbe\u78ba\u4f4d\u7f6e\u7528\u65bc\u5b9a\u4f4d\uff08\u661f\u66c6\uff09<\/li>\n<li>\u6982\u7565\u4f4d\u7f6e\u7528\u65bc\u641c\u661f\uff08\u5e74\u66c6\uff09<\/li>\n<li>\u7121\u8ad6\u54ea\u500b\u7cfb\u7d71\uff0c\u539f\u7406\u90fd\u4e00\u6a23<\/li>\n<\/ol>\n<hr \/>\n<h2>\u2753 \u5e38\u898b\u554f\u984c<\/h2>\n<h3>Q1: \u70ba\u4ec0\u9ebc\u624b\u6a5fGPS\u6bd4\u8eca\u6a5f\u5feb\uff1f<\/h3>\n<p><strong>\u7b54<\/strong>\uff1a\u624b\u6a5f\u4f7f\u7528A-GPS\uff0c\u901a\u904e\u7db2\u8def\u5e7e\u79d2\u4e0b\u8f09\u5b8c\u6210\u3002\u8eca\u6a5f\u5982\u679c\u6c92\u7db2\u8def\uff0c\u9700\u5f9e\u885b\u661f\u63a5\u6536\uff08\u5e7e\u5206\u9418\uff09\u3002<\/p>\n<h3>Q2: \u98db\u822a\u6a21\u5f0f\u4e0bGPS\u9084\u80fd\u7528\u55ce\uff1f<\/h3>\n<p><strong>\u7b54<\/strong>\uff1a\u53ef\u4ee5\uff01\u4f46\u9996\u6b21\u5b9a\u4f4d\u6703\u8b8a\u6162\u3002\u5982\u679c\u661f\u66c6\u548c\u5e74\u66c6\u9084\u6709\u6548\uff0c\u901f\u5ea6\u4e0d\u53d7\u5f71\u97ff\u3002<\/p>\n<h3>Q3: \u9700\u8981\u624b\u52d5\u66f4\u65b0\u55ce\uff1f<\/h3>\n<p><strong>\u7b54<\/strong>\uff1a\u901a\u5e38\u4e0d\u9700\u8981\u3002\u73fe\u4ee3\u8a2d\u5099\u6703\u81ea\u52d5\u7ba1\u7406\u3002\u53ea\u6709\u9577\u671f\u672a\u7528\u5f8c\u53ef\u80fd\u9700\u8981\u7b49\u5f85\u91cd\u65b0\u4e0b\u8f09\u3002<\/p>\n<h3>Q4: \u661f\u66c6\u548c\u5e74\u66c6\u6703\u4e1f\u5931\u55ce\uff1f<\/h3>\n<p><strong>\u7b54<\/strong>\uff1a\u95dc\u6a5f\u4e0d\u6703\u4e1f\u5931\uff08\u5132\u5b58\u5728\u8a18\u61b6\u9ad4\uff09\u3002\u4f46\uff1a<\/p>\n<ul>\n<li>\u9577\u6642\u9593\u95dc\u6a5f\u6703\u904e\u671f<\/li>\n<li>\u96fb\u6c60\u5b8c\u5168\u8017\u76e1\u53ef\u80fd\u4e1f\u5931<\/li>\n<li>\u91cd\u7f6e\u8a2d\u5099\u6703\u6e05\u9664<\/li>\n<\/ul>\n<h3>Q5: \u70ba\u4ec0\u9ebc\u6709\u6642\u5019\u7a81\u7136\u5b9a\u4f4d\u5f88\u6162\uff1f<\/h3>\n<p><strong>\u7b54<\/strong>\uff1a\u53ef\u80fd\u539f\u56e0\uff1a<\/p>\n<ul>\n<li>\u661f\u66c6\u904e\u671f\uff08\u8d85\u904e4\u5c0f\u6642\u672a\u4f7f\u7528\uff09<\/li>\n<li>\u5e74\u66c6\u904e\u671f\uff08\u9577\u671f\u672a\u4f7f\u7528\uff09<\/li>\n<li>\u4f4d\u7f6e\u8b8a\u5316\u592a\u5927\uff08\u8de8\u570b\u65c5\u884c\uff09<\/li>\n<li>\u7db2\u8def\u4e0d\u4f73\uff08\u7121\u6cd5\u4f7f\u7528A-GPS\uff09<\/li>\n<\/ul>\n<h3>Q6: \u5e74\u66c6\u771f\u7684\u898112.5\u5206\u9418\u55ce\uff1f<\/h3>\n<p><strong>\u7b54<\/strong>\uff1a\u5b8c\u6574\u5e74\u66c6\u78ba\u5be6\u9700\u898112.5\u5206\u9418\uff0c\u4f46\uff1a<\/p>\n<ul>\n<li>\u5be6\u969b\u4e0a2-3\u5206\u9418\u5c31\u80fd\u958b\u59cb\u5de5\u4f5c<\/li>\n<li>\u73fe\u4ee3\u8a2d\u5099\u901a\u904eA-GPS\u53ea\u97001-2\u79d2<\/li>\n<li>\u4f60\u5e7e\u4e4e\u4e0d\u6703\u9047\u5230\u9700\u8981\u7b4912.5\u5206\u9418\u7684\u60c5\u6cc1<\/li>\n<\/ul>\n<hr \/>\n<h2>\ud83d\udca1 \u8a18\u61b6\u53e3\u8a23<\/h2>\n<blockquote>\n<p><strong>\u661f\u66c6\u50cf\u300c\u5373\u6642\u5c0e\u822a\u300d\u2014\u2014 \u7cbe\u78ba\u4f46\u8981\u5e38\u66f4\u65b0<\/strong><br \/>\n<strong>\u5e74\u66c6\u50cf\u300c\u5730\u5716\u7d22\u5f15\u300d\u2014\u2014 \u7c97\u7565\u4f46\u80fd\u7528\u5f88\u4e45<\/strong><\/p>\n<\/blockquote>\n<p>\u6216\u8005\uff1a<\/p>\n<blockquote>\n<p><strong>\u661f\u66c6 = \u7cbe\u5bc6\u5730\u5716\uff08\u7c73\u7d1a\uff0c\u5e7e\u5c0f\u6642\uff09<\/strong><br \/>\n<strong>\u5e74\u66c6 = \u76ee\u9304\u7d22\u5f15\uff08\u516c\u91cc\u7d1a\uff0c\u5e7e\u500b\u6708\uff09<\/strong><\/p>\n<\/blockquote>\n<hr \/>\n<h2>\ud83d\udcdd \u7e3d\u7d50<\/h2>\n<h3>\u661f\u66c6\uff08Ephemeris\uff09<\/h3>\n<ul>\n<li>\u2705 \u55ae\u9846\u885b\u661f\u7684\u7cbe\u78ba\u4f4d\u7f6e<\/li>\n<li>\u2705 \u7c73\u7d1a\u7cbe\u5ea6<\/li>\n<li>\u2705 2-4\u5c0f\u6642\u6709\u6548<\/li>\n<li>\u2705 \u7528\u65bc\u7cbe\u78ba\u5b9a\u4f4d\u8a08\u7b97<\/li>\n<li>\u2705 \u9700\u8981\u983b\u7e41\u66f4\u65b0<\/li>\n<\/ul>\n<h3>\u5e74\u66c6\uff08Almanac\uff09<\/h3>\n<ul>\n<li>\u2705 \u6240\u6709\u885b\u661f\u7684\u6982\u7565\u4f4d\u7f6e<\/li>\n<li>\u2705 \u516c\u91cc\u7d1a\u7cbe\u5ea6<\/li>\n<li>\u2705 30-180\u5929\u6709\u6548<\/li>\n<li>\u2705 \u7528\u65bc\u5feb\u901f\u641c\u5c0b\u885b\u661f<\/li>\n<li>\u2705 \u9577\u671f\u6709\u6548<\/li>\n<\/ul>\n<h3>\u5169\u8005\u95dc\u4fc2<\/h3>\n<ul>\n<li>\ud83e\udd1d \u76f8\u8f14\u76f8\u6210\uff0c\u7f3a\u4e00\u4e0d\u53ef<\/li>\n<li>\ud83e\udd1d \u5e74\u66c6\u5feb\u901f\u627e\u661f\uff0c\u661f\u66c6\u7cbe\u78ba\u5b9a\u4f4d<\/li>\n<li>\ud83e\udd1d \u914d\u5408\u4f7f\u7528\u5be6\u73fe\u5feb\u901f\u4e14\u7cbe\u78ba\u7684\u5b9a\u4f4d<\/li>\n<\/ul>\n<p><strong>\u4e0b\u6b21\u6253\u958b\u5730\u5716APP\uff0c\u4f60\u5c31\u77e5\u9053\u80cc\u5f8c\u767c\u751f\u4e86\u4ec0\u9ebc\uff01<\/strong> \ud83d\uddfa\ufe0f\ud83d\udccd<\/p>\n<hr \/>\n<p><em>\u53c3\u8003\u8cc7\u6599\uff1aGPS\u5b98\u65b9\u6587\u4ef6\u3001IGS\u6280\u8853\u898f\u7bc4\u3001\u5404GNSS\u7cfb\u7d71\u516c\u958b\u8cc7\u6599<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u70ba\u4ec0\u9ebcGPS\u6709\u6642\u5019\u79d2\u5b9a\u4f4d\uff0c\u6709\u6642\u5019\u8981\u7b49\u597d\u5e7e\u5206\u9418\uff1f\u95dc\u9375\u5c31\u5728\u300c\u661f\u66c6\u300d\u548c\u300c\u5e74\u66c6\u300d\uff01 \ud83d\udce1  &hellip; <a href=\"https:\/\/hsiang.cc\/?p=677\">\u95b1\u8b80\u5168\u6587 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[497,396],"tags":[678,676,675,99,68,549,677,680,106,674,683,673,682,552,679,681,684],"class_list":["post-677","post","type-post","status-publish","format-standard","hentry","category-iot","category-tech","tag-a-gps","tag-almanac","tag-ephemeris","tag-gnss","tag-gps","tag-ttff","tag-677","tag-680","tag-106","tag-674","tag-683","tag-673","tag-682","tag-552","tag-679","tag-681","tag-684"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/677","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=677"}],"version-history":[{"count":4,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/677\/revisions"}],"predecessor-version":[{"id":680,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/677\/revisions\/680"}],"wp:attachment":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}