{"id":58,"date":"2022-04-26T02:33:48","date_gmt":"2022-04-26T02:33:48","guid":{"rendered":"http:\/\/yanjingzhi.china-vo.org\/blog\/?p=58"},"modified":"2022-04-26T02:33:48","modified_gmt":"2022-04-26T02:33:48","slug":"%e5%a4%aa%e9%98%b3%e7%b3%bb%e6%98%9f%e5%8e%86%e8%a1%a8%ef%bc%88%e8%b0%b7%e6%ad%8c%e7%bf%bb%e8%af%91%ef%bc%89","status":"publish","type":"post","link":"http:\/\/yanjingzhi.xyz\/blog\/?p=58","title":{"rendered":"\u592a\u9633\u7cfb\u661f\u5386\u8868\uff08\u8c37\u6b4c\u7ffb\u8bd1\uff09"},"content":{"rendered":"\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u592a\u9633\u7cfb\u661f\u5386\u8868Ephemeris\uff08\u590d\u6570\uff1aephemerides\uff09\u6765\u81ea\u5e0c\u814a\u8bed\u201c&nbsp;<em>eph\u00e9meros<\/em>&nbsp;\u201d\uff0c\u610f\u601d\u662f\u201c<em>\u6bcf\u5929<\/em>\u201d 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\u5229\u7528\u822a\u6d77\u5386\u4e66\u4e2d\u9884\u6d4b\u7684\u6052\u661f\u548c\u884c\u661f\u7684\u4f4d\u7f6e\u6765\u786e\u5b9a\u4ed6\u7684\u4f4d\u7f6e\uff0c\u5e76\u5bf9\u7ed3\u679c\u7684\u7cbe\u786e\u6027\u611f\u5230\u60ca\u8bb6\uff0c1896 \u5e74\uff0cJoshua Slocum \u5728\u4ed6\u7684\u201c<em>\u72ec\u81ea\u73af\u6e38\u4e16\u754c<\/em>\u201c\uff1a&nbsp;<em>&#8230;&#8230;\u6211\u610f\u8bc6\u5230\u4ed6\u4eec\u8fd0\u52a8\u7684\u6570\u5b66\u771f\u7406\uff0c\u4f17\u6240\u5468\u77e5\uff0c\u5929\u6587\u5b66\u5bb6\u7f16\u5236\u4e86\u4ed6\u4eec\u591a\u5e74\u6765\u548c\u65e5\u5b50\u4ee5\u53ca\u4e00\u5929\u4e2d\u7684\u5206\u949f\u7684\u4f4d\u7f6e\u8868\uff0c\u5176\u7cbe\u5ea6\u5982\u6b64\u4e4b\u9ad8\uff0c\u4ee5\u81f3\u4e8e\u4e00\u4e2a\u4eba\u51fa\u73b0\u5373\u4f7f\u5728\u4e94\u5e74\u540e\u7684\u6d77\u4e0a\uff0c\u5728\u4ed6\u4eec\u7684\u5e2e\u52a9\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u627e\u5230\u5730\u7403\u4e0a\u4efb\u4f55\u7ed9\u5b9a\u5b50\u5348\u7ebf\u7684\u6807\u51c6\u65f6\u95f4&#8230;&#8230;<\/em>\u4eca\u5929<br><br>\uff0c\u73b0\u4ee3\u8ba1\u7b97\u673a\u7684\u8ba1\u7b97\u80fd\u529b\u4e0d\u4ec5\u53ef\u4ee5\u9ad8\u7cbe\u5ea6\u5730\u8ba1\u7b97\u884c\u661f\u661f\u5386\uff0c\u800c\u4e14\u4e5f\u4ee5\u6bcf\u5c0f\u65f6\u4e3a\u57fa\u7840\uff08\u800c\u4e0d\u662f\u4f20\u7edf\u7684\u6bcf\u65e5\u57fa\u7840\uff09\u7684\u884c\u661f\u4f4d\u7f6e\u5217\u8868\u3002\u4ee5\u5c0f\u65f6\u4e3a\u57fa\u7840\u7684\u884c\u661f\u661f\u5386\u8868\u662f\u5f53\u4eca\u822a\u6d77\u5386\u4e66\u7684\u4e3b\u8981\u90e8\u5206\u3002<br><br>\u79d1\u5b66\u661f\u5386\u5929\u4f53\u7684\u661f\u5386\u8868\u5c06\u5929\u4f53\u7684\u4f4d\u7f6e\uff08\u548c\u901f\u5ea6\uff09\u63cf\u8ff0\u4e3a\u65f6\u95f4\u7684\u51fd\u6570\u3002\u661f\u5386\u6570\u636e\u662f\u901a\u8fc7\u6c42\u89e3\u7269\u4f53\u7684\u57fa\u672c\u8fd0\u52a8\u65b9\u7a0b\u83b7\u5f97\u7684\uff0c\u8be5\u65b9\u7a0b\u662f\u901a\u8fc7\u5e94\u7528\u5f00\u666e\u52d2\u548c\u725b\u987f\u5047\u8bbe\u7684\u57fa\u672c\u8fd0\u52a8\u5b9a\u5f8b\u83b7\u5f97\u7684\u3002<br><br>\u6c42\u89e3\u57fa\u672c\u8fd0\u52a8\u65b9\u7a0b\u4ee5\u83b7\u5f97\u661f\u5386\u6709\u4e24\u79cd\u57fa\u672c\u65b9\u6cd5\uff1a\u89e3\u6790\u65b9\u6cd5\u548c\u6570\u503c\u65b9\u6cd5\u3002\u5206\u6790\u661f\u5386\u57fa\u4e8e\u5c01\u95ed\u5f62\u5f0f\u7684\u4ee3\u6570\u8868\u8fbe\u5f0f\uff0c\u8be5\u8868\u8fbe\u5f0f\u5728\u7ed9\u5b9a\u7684\u65f6\u95f4\u5b9e\u4f8b\u4e2d\u4ea7\u751f\u7269\u4f53\u7684\u4f4d\u7f6e\u548c\u901f\u5ea6\u5206\u91cf\u3002\u8fd9\u4e9b\u8868\u8fbe\u5f0f\u5fc5\u987b\u4ece\u7269\u4f53\u8fd0\u52a8\u65b9\u7a0b\u7684\u4ee3\u6570\u89e3\u4e2d\u63a8\u5bfc\u51fa\u6765\u3002\u5206\u6790\u661f\u5386\u8868\u7684\u4e3b\u8981\u597d\u5904\u662f\u5b83\u4eec\u5c06\u4f4d\u7f6e\u548c\u901f\u5ea6\u5206\u91cf\u8868\u793a\u4e3a\u65f6\u95f4\u7684\u663e\u5f0f\u51fd\u6570\u3002\u5f53\u8003\u8651\u5230\u76f8\u4e92\u5f15\u529b\u6270\u52a8\u548c\u76f8\u5bf9\u8bba\u6548\u5e94\u65f6\uff0c\u8868\u8fbe\u5f0f\u5fc5\u7136\u53d8\u5f97\u76f8\u5f53\u590d\u6742\uff0c\u89e3\u6790\u89e3\u53ef\u80fd\u53d8\u5f97\u4e0d\u53ef\u884c\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u5bf9\u4e8e\u9700\u8981\u4e00\u5b9a\u7cbe\u5ea6\u7684\u5e94\u7528\uff0c\u4e0d\u518d\u4f7f\u7528\u5206\u6790\u661f\u5386\u8868\u3002\u6570\u503c\u661f\u5386\u4f9d\u8d56\u4e8e\u8fd0\u52a8\u65b9\u7a0b\u7684\u6570\u503c\u89e3\u3002\u8fd9\u79cd\u8ba1\u7b97\u7684\u8f93\u51fa\u662f\u4e00\u4e2a\u6570\u5b57\u8868\uff0c\u7ed9\u51fa\u4e86\u6240\u9700\u65f6\u95f4\u5b9e\u4f8b\u7684\u4f4d\u7f6e\u548c\u901f\u5ea6\u3002\u8fd9\u79cd\u65b9\u6cd5\u7684\u4e00\u4e2a\u6f5c\u5728\u7f3a\u70b9\u662f\u5f53\u5bf9\u8c61\u7684\u4f4d\u7f6e\u548c\u901f\u5ea6\u5206\u91cf\u9700\u8981\u5927\u91cf\u65f6\u95f4\u65f6\uff0c\u8868\u683c\u7684\u7edd\u5bf9\u5927\u5c0f\u3002\u5728\u5b9e\u8df5\u4e2d\uff0c\u6570\u5b57\u751f\u6210\u7684\u4f4d\u7f6e\u8868\uff08\u548c\u901f\u5ea6\uff09\u53ef\u4ee5\u901a\u8fc7\u7528\u6570\u5b66\u51fd\u6570\u201c\u62df\u5408\u201d\u5b83\u4eec\u6765\u538b\u7f29\uff0c\u8be5\u6570\u5b66\u51fd\u6570\u53ef\u4ee5\u5c06\u539f\u59cb\u8868\u503c\u590d\u5236\u5230\u4efb\u4f55\u6240\u9700\u65f6\u95f4\u5b9e\u4f8b\u7684\u975e\u5e38\u5c0f\u7684\u5bb9\u5dee\u5185\u3002\u8fd9\u662f\u4f8b\u5982\u5728<em>\u55b7\u6c14\u63a8\u8fdb\u5b9e\u9a8c\u5ba4 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\u884c\u661f\u661f\u5386\u8868\u7684\u5236\u4f5c\u4e2d\u6240\u91c7\u7528\u7684\u65b9\u6cd5<\/em>.&nbsp;\u8bf7\u6ce8\u610f\uff0c\u5141\u8bb8\u4ee5\u4ee3\u6570\u65b9\u5f0f\u8ba1\u7b97\u661f\u5386\u7684\u4e00\u90e8\u5206\u7684\u201c\u62df\u5408\u201d\u51fd\u6570\u4e0e\u57fa\u672c\u8fd0\u52a8\u65b9\u7a0b\u7684\u4ee3\u6570\u89e3\u4e0d\u540c\uff01<br>\u4ece\u661f\u5386\u8868\u83b7\u5f97\u7684\u884c\u661f\u4f4d\u7f6e\u901a\u5e38\u4e0d\u9002\u5408\u5730\u7403\u89c2\u6d4b\u8005\u4f7f\u7528\u3002\u9700\u8981\u8fdb\u884c\u4e00\u4e9b\u53d8\u6362\uff08\u5c06\u5750\u6807\u53c2\u8003\u70b9\u4ece\u592a\u9633\u7cfb\u91cd\u5fc3\u79fb\u52a8\u5230\u89c2\u5bdf\u8005\u7684\u4f4d\u7f6e\uff09\u548c\u6821\u6b63\uff08\u4ee5\u8003\u8651\u5927\u6c14\u6548\u5e94\u4ee5\u53ca\u7531\u4e8e\u5149\u901f\u6709\u9650\u5bfc\u81f4\u7684\u201c\u65f6\u95f4\u5ef6\u8fdf\u201d\u6548\u5e94\uff09\uff0c\u4ee5\u51cf\u5c11\u5c06\u83b7\u5f97\u7684\u661f\u5386\u6570\u636e\u8f6c\u6362\u4e3a\u53ef\u7528\u4e8e\u5c06\u5176\u4e0e\u89c2\u6d4b\u503c\u8fdb\u884c\u6bd4\u8f83\u7684\u5f62\u5f0f\u3002<br><br>\u661f\u5386\u6570\u636e\u7684\u5750\u6807\u7cfb\u5929\u4f53\u7684\u661f\u5386\u6570\u636e\u5c06\u5929\u4f53\u7684\u6811\u7ef4\u4f4d\u7f6e\u548c\u901f\u5ea6\u77e2\u91cf\u63cf\u8ff0\u4e3a\u76f4\u89d2\u5750\u6807\u7cfb\u4e2d\u65f6\u95f4\u7684\u51fd\u6570\u3002\u76f4\u89d2\u5750\u6807\u7cfb\u7684\u539f\u70b9\u4f4d\u4e8e\u592a\u9633\u7cfb\u7684\u91cd\u5fc3\uff08\u8d28\u5fc3\uff09\u3002Z\u8f74\u6307\u5411\u5929\u5317\u6781\uff0c\u661f\u5386\u5750\u6807\u7cfb\u7684XY\u5e73\u9762\u5e73\u884c\u4e8e\u5730\u7403\u8d64\u9053\u5e73\u9762\u3002X \u8f74\u4e3a\u6625\u5206\u65b9\u5411\uff0cY \u8f74\u6307\u5411 RA=6 \u5c0f\u65f6\uff0cDec=0\u3002<br><br>\u7531\u4e8e\u5730\u7403\u6781\u8f74\u7684\u65b9\u5411 &#8211; \u4ee5\u53ca\u5317\u6781\u548c\u8d64\u9053\u5e73\u9762\u7684\u65b9\u5411 &#8211; \u4e0d\u65ad\u53d8\u5316\uff0c\u56e0\u6b64\u5fc5\u987b\u4e3a\u7279\u5b9a\u7684\u65f6\u95f4\u6216<em>\u7eaa\u5143\u6307\u5b9a\u5750\u6807\u7cfb<\/em>.&nbsp;<em>\u55b7\u6c14\u63a8\u8fdb\u5b9e\u9a8c\u5ba4 (JPL)<\/em>\u63d0\u4f9b\u7684\u6700\u65b0\u6570\u5b57\u661f\u5386\u8868\u7cfb\u5217&nbsp;\u4f7f\u7528\u201cJ2000\u201d\u8d64\u9053\u548c\u6625\u5206\u70b9\u3002J2000 \u4ee3\u8868\u5112\u7565\u5386\u4e4b\u540e\u7684 2000 \u5e74 1 \u6708 1 \u65e5\u30021998 \u5e74 1 \u6708\uff0c<a href=\"http:\/\/www.iau.org\/\">\u56fd\u9645\u5929\u6587\u5b66\u8054\u5408\u4f1a<\/a>&nbsp;\u91c7\u7528\u4e86<a href=\"https:\/\/www.siranah.de\/html\/sail040x.htm\">\u201c\u56fd\u9645\u5929\u4f53\u53c2\u8003\u7cfb (ICRF)<\/a>\u4f5c\u4e3a\u65b0\u7684\u53c2\u8003\u7cfb\u3002\u8be5 ICRF \u662f\u57fa\u4e8e\u5206\u5e03\u5728\u6574\u4e2a\u5929\u7a7a\u4e2d\u7684 200 \u591a\u4e2a\u6cb3\u5916\u6e90\u7684\u65e0\u7ebf\u7535\u4f4d\u7f6e\u3002\u8fd9\u4e9b\u5b9a\u4f4d\u7cbe\u5ea6\u6e90\u5728 RA \u548c Dec \u5750\u6807\u4e2d\u90fd\u4f18\u4e8e 1 \u6beb\u5f27\u79d2\u3002\u6846\u67b6\u8f74\u7684\u6700\u7ec8\u65b9\u5411\u662f\u901a\u8fc7\u5c06\u4f4d\u7f6e\u65cb\u8f6c\u5230\u56fd\u9645\u5929\u4f53\u53c2\u8003\u7cfb\u7edf (ICRS) \u7cfb\u7edf\u4e2d\u83b7\u5f97\u7684\uff0c\u5e76\u4e14\u4e0eFK5 J2000.0 \u5149\u5b66\u7cfb\u7edf\u3002<a href=\"http:\/\/www.iau.org\/\"><\/a><br><br>\u5929\u4f53\u5728\u5929\u7a7a\u4e2d\u7684\u4f4d\u7f6e\u661f\u5386\u6570\u636e\u662f\u6307\u592a\u9633\u7cfb\u91cd\u5fc3\uff0c\u7b1b\u5361\u5c14X\u3001Y\u3001Z\u8f74\u5728\u7a7a\u95f4\u4e2d\u56fa\u5b9a\u5982\u4e0b\uff1a X\u3001Y\u8f74\u5728\u8d64\u9053\u5929\u4f53\u5e73\u9762\uff1bZ \u8f74\u5782\u76f4\u4e8e\u8be5\u5e73\u9762\u5e76\u6307\u5411\u5929\u4f53\u5317\u6781\u3002X\u8f74\u7531\u6625\u5206\u70b9\u56fa\u5b9a\u5728\u8d64\u9053\u5e73\u9762\u4e0a\u3002\u7531\u4e8e\u8fd9\u4e2a\u6625\u5206\u70b9\u968f\u7740\u65f6\u95f4\u63a8\u79fb\u800c\u79fb\u52a8\uff0c\u56e0\u6b64\u8fd9\u4e9b\u5750\u6807\u7cfb\u88ab\u7ed1\u5b9a\u5230\u4e00\u4e2a\u65e5\u671f\uff0c\u4f8b\u5982 J2000 \u7cfb\u7edf\u7684\u65e5\u671f\u4e3a 2000 \u5e74 1 \u6708 1 \u65e5\u3002\u5728\u8fd9\u6837\u7684\u6b63\u4ea4 X,Y,Z \u5750\u6807\u7cfb\u4e2d\uff0c\u7a7a\u95f4\u4e2d\u7684\u4efb\u4f55\u5bf9\u8c61\u90fd\u53ef\u4ee5\u7528\u4e00\u7ec4 3 \u4e2a\u5750\u6807 (X,Y,Z) \u8868\u793a\uff0c\u8fd9\u4e9b\u5750\u6807\u8868\u793a\u6cbf\u6b63\u4ea4 X,Y,Z \u8f74\u7684\u4f4d\u7f6e\u77e2\u91cf\u7684\u5206\u91cf\u3002<br><br>\u4e3a\u4e86\u4f7f\u5730\u7403\u4e0a\u7684\u5929\u6587\u5b66\u5bb6\u6216\u5bfc\u822a\u5458\u80fd\u591f\u5c06\u4ed6\u7684\u89c2\u6d4b\u7ed3\u679c\u4e0e\u8ba1\u7b97\u51fa\u7684\u661f\u5386\u6570\u636e\u8fdb\u884c\u6bd4\u8f83\uff0c\u5fc5\u987b\u6839\u636e\u4e0d\u540c\u7684\u539f\u70b9\uff08\u592a\u9633\u4e2d\u5fc3\u91cd\u5fc3\u548c\u89c2\u6d4b\u8005\u5728\u5730\u7403\u4e0a\u7684\u4f4d\u7f6e\uff09\u8fdb\u884c\u884c\u661f\u5750\u6807\u7684\u8f6c\u6362.<br><br>\u5728\u5df2\u77e5\u5730\u7403\u4f4d\u7f6e\u548c\u5929\u4f53\u4f4d\u7f6e\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u8ba1\u7b97\u7b2c\u4e00\u4e2a\u5730\u5fc3\u4f4d\u7f6e\uff08\u4ece\u5730\u7403\u4e2d\u5fc3\u770b\uff09\uff1a \u5bf9\u8c61(x,y,z) = \u5bf9\u8c61(X,Y,Z) &#8211; \u5730\u7403(X,Y,Z)\u8fd9\u91cc\u7684\u5750\u6807 (X,Y,Z) \u662f\u6307\u661f\u5386\u6570\u636e\u7684\u539f\u59cb\u76f4\u89d2\u5750\u6807\u7cfb\uff0c\u800c (x,y,z) \u5750\u6807\u662f\u6307\u201c\u5e73\u79fb\u201d\u540e\u7684\u5730\u5fc3\u5750\u6807\u7cfb\u3002\u5728\u4e0b\u4e00\u6b65\u4e2d\uff0c\u5fc5\u987b\u5c06\u5730\u5fc3\u5750\u6807\u8f6c\u6362\u4e3a\u83b7\u5f97\u5730\u5fc3\u5750\u6807 (a,b,c) \u7684\u89c2\u5bdf\u8005\u7684\u4f4d\u7f6e\uff1a \u5bf9\u8c61(a,b,c) = \u5bf9\u8c61(x,y,z) &#8211; \u89c2\u5bdf\u8005(x,y,z)\u8bf7\u8bb0\u4f4f\uff0c(x,y,z) \u662f\u5730\u5fc3\u5750\u6807\u3002\u6700\u540e\uff0c\u4ee5\u5730\u5f62\u4e3a\u4e2d\u5fc3\u7684\u5750\u6807 (a,b,c) \u5c06\u88ab\u8f6c\u6362\u4e3a\u66f4\u6709\u7528\u7684\u7f51\u683c\uff0c\u4f8b\u5982\u8d64\u7ecf &#8211; \u8d64\u7eac\u5750\u6807\u7cfb\uff1a \u5341\u4e8c\u6708 = atan(c \/ sqrt(a*a + b*b) ) RA = atan(a \/ b)\u8fd9\u662f\u7f51\u683c\uff0c\u5929\u6587\u5b66\u5bb6\u7528\u5b83\u6765\u63cf\u8ff0\u5929\u4f53\u5728\u5929\u7a7a\u4e2d\u7684\u4f4d\u7f6e\u3002\u5b83\u8fd8\u7528\u4e8e\u5c06\u671b\u8fdc\u955c\u6307\u5411\u5929\u7a7a\u4e2d\u7684\u7269\u4f53\uff0c\u5176 (RA,Dec) \u5750\u6807\u662f\u5df2\u77e5\u7684\u3002<br><br>\u65f6\u95f4\u5ef6\u8fdf\u548c\u8868\u89c2\u65b9\u5411\u592a\u9633\u7cfb\u4e0d\u662f\u9759\u6b62\u7684\u3002\u5149\u4ece\u7269\u4f53\u4f20\u64ad\u5230\u5730\u7403\u4e0a\u7684\u89c2\u5bdf\u8005\u9700\u8981\u4e00\u4e9b\u65f6\u95f4\u8fd9\u4e00\u4e8b\u5b9e\u663e\u7740\u5f71\u54cd\u4e86\u8fdc\u5904\u7269\u4f53\u7684\u8868\u89c2\u65b9\u5411\u3002\u5f53\u6211\u4eec\u89c2\u5bdf\u5929\u7a7a\u4e2d\u7684\u4e00\u9897\u884c\u661f\u65f6\uff0c\u6211\u4eec\u5b9e\u9645\u4e0a\u770b\u5230\u7684\u662f\u8fd9\u9897\u884c\u661f\u5904\u4e8e\u5176\u5149\u7ebf\u79bb\u5f00\u884c\u661f\u65f6\u6240\u5904\u7684\u4f4d\u7f6e\u3002\u8fd9\u53ef\u80fd\u662f\u89c2\u5bdf\u65f6\u523b\u4e4b\u524d\u7684\u51e0\u5206\u949f\u751a\u81f3\u51e0\u4e2a\u5c0f\u65f6\u3002\u8865\u507f\u8fd9\u4e2a\u201c\u65f6\u95f4\u5ef6\u8fdf\u201d\u7684\u8fc7\u7a0b\u662f\u8fed\u4ee3\u8ba1\u7b97\u89c2\u6d4b\u65f6\u5230\u884c\u661f\u7684\u8ddd\u79bb\uff0c\u8ba1\u7b97\u201c\u5149\u4f20\u64ad\u65f6\u95f4\u201d\uff0c\u5e76\u91cd\u65b0\u8ba1\u7b97\u884c\u661f\u5728\u5f53\u524d\u65f6\u95f4\u7684\u4f4d\u7f6e\u51cf\u53bb\u8fd9\u4e2a\u201c\u5149\u4f20\u64ad\u65f6\u95f4\u201d\u3002\u7136\u540e\u91cd\u65b0\u8ba1\u7b97\u5230\u884c\u661f\u7684\u8ddd\u79bb\u5e76\u7ee7\u7eed\u201c\u65f6\u95f4\u201d\u6821\u6b63\uff0c\u76f4\u5230\u8fed\u4ee3\u6536\u655b\u5230\u6b63\u786e\u7684\u4f4d\u7f6e\u3002<br><br>\u7531\u4e8e\u5149\u901f\u6709\u9650\uff0c\u5bf9\u884c\u661f\u8868\u89c2\u65b9\u5411\u7684\u7b2c\u4e8c\u6b21\u4fee\u6b63\u6765\u81ea\u89c2\u5bdf\u8005\u7684\u8fd0\u52a8\u3002\u8fd9\u79cd\u6821\u6b63\u88ab\u79f0\u4e3a\u201c\u5149\u50cf\u5dee\u201d\uff0c\u5e76\u4e14 &#8211; \u5728\u7b2c\u4e00\u8fd1\u4f3c\u4e2d &#8211; \u7b49\u4e8e<em>\u201c\u5782\u76f4\u4e8e\u89c6\u7ebf\u7684\u89c2\u5bdf\u8005\u8fd0\u52a8\u7684\u901f\u5ea6\u5206\u91cf\u201d\u4e0e\u201c\u5149\u901f\u201d<\/em>\u7684<em>\u6bd4\u7387<\/em>\u3002\u5730\u7403\u7684\u8f68\u9053\u901f\u5ea6\u7ea6\u4e3a 30 \u516c\u91cc\/\u79d2\uff0c\u800c\u8d64\u9053\u89c2\u5bdf\u8005\u7684\u5207\u5411\u901f\u5ea6\u5219\u5c0f\u4e8e 0.5 \u516c\u91cc\/\u79d2\u3002\u8fd9\u4f1a\u4ea7\u751f\u5927\u7ea6 0.3 \u5f27\u5206\u7684\u50cf\u5dee\u6548\u679c\u3002<br><br>\u5750\u6807\u7cfb\u4fee\u6b63\u6309\u7167\u73b0\u4ee3\u5929\u4f53\u6d4b\u91cf\u7684\u6807\u51c6\uff0c\u5730\u7403\u662f\u4e00\u4e2a\u975e\u5e38\u4e0d\u7a33\u5b9a\u7684\u5e73\u53f0\uff0c\u53ef\u4ee5\u7528\u6765\u89c2\u5bdf\u5929\u7a7a\u3002\u5730\u7403\u7684\u81ea\u8f6c\u901f\u5ea6\u662f\u4e0d\u5747\u5300\u7684\uff0c\u5b83\u7684\u81ea\u8f6c\u8f74\u5728\u7a7a\u95f4\u4e0a\u662f\u4e0d\u56fa\u5b9a\u7684\uff0c\u751a\u81f3\u5b83\u7684\u5f62\u72b6\u548c\u5730\u8868\u4f4d\u7f6e\u7684\u76f8\u5bf9\u4f4d\u7f6e\u4e5f\u4e0d\u56fa\u5b9a\u3002\u4e3a\u4e86\u5c06\u671b\u8fdc\u955c\u6307\u5411\u4e00\u89d2\u79d2\u7684\u7cbe\u5ea6\uff0c\u4e0d\u89c4\u5219\u7684\u5f62\u72b6\u548c\u8868\u9762\u4e0d\u662f\u95ee\u9898\uff0c\u4f46\u5730\u7403\u81ea\u8f6c\u8f74\u65b9\u5411\u7684\u53d8\u5316\u975e\u5e38\u91cd\u8981\u3002<br><br>\u4ece\u67d0\u79cd\u610f\u4e49\u4e0a\u8bf4\uff0c\u8d64\u9053\u5929\u7a7a\u5750\u6807\u662f\u57fa\u4e8e\u5730\u7403\u7684\u7cfb\u7edf\u548c\u76f8\u5bf9\u4e8e\u9065\u8fdc\u6052\u661f\u7684\u56fa\u5b9a\u7cfb\u7edf\u4e4b\u95f4\u7684\u6298\u8877\u3002\u8d64\u7ecf (RA) \u548c\u8d64\u7eac (Dec) \u975e\u5e38\u7c7b\u4f3c\u4e8e\u5730\u7403\u8868\u9762\u7684\u7ecf\u5ea6\u548c\u7eac\u5ea6\u3002\u5b83\u4eec\u5171\u4eab\u76f8\u540c\u7684\u6781\u8f74\u548c\u8d64\u9053\uff0c\u4f46\u5929\u7a7a\u5750\u6807\u7f51\u683c\u4e0d\u968f\u5730\u7403\u6bcf\u65e5\u81ea\u8f6c\u800c\u65cb\u8f6c\u3002\u7136\u800c\uff0c\u660e\u663e\u7684\u8d64\u7ecf\u548c\u8d64\u7eac\u76f8\u5bf9\u4e8e\u6052\u661f\u6765\u8bf4\u5e76\u4e0d\u662f\u56fa\u5b9a\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u5750\u6807\u7cfb\u9075\u5faa\u5730\u7403\u6781\u70b9\u548c\u8d64\u9053\u7684\u8fd0\u52a8\u3002\u4e3a\u4e86\u80fd\u591f\u5728\u76ee\u5f55\u4e2d\u5217\u51fa\u6052\u661f\u4f4d\u7f6e\uff0c\u5fc5\u987b\u6709\u4e00\u4e2a\u7ea6\u5b9a\uff0c\u5728\u51c6\u786e\u7684\u6307\u5b9a\u65f6\u95f4\u4f7f\u7528\u5730\u7403\u6781\u70b9\u548c\u8d64\u9053\u7684\u4f4d\u7f6e\uff0c\u4e3b\u8981\u662f\u901a\u8fc7\u5728\u8fd9\u4e9b\u6307\u5b9a\u65f6\u95f4\u5b9a\u4e49 RA \u548c Dec\u201c\u96f6\u201d\u70b9\u30021\u67081\u65e5\uff0c<br><br>\u8d64\u7ecf\u7684\u96f6\u70b9\u5e76\u672a\u5206\u914d\u7ed9\u7279\u5b9a\u7684\u5929\u4f53\uff0c\u5c31\u50cf\u96f6\u7ecf\u5ea6\u88ab\u5b9a\u4e49\u4e3a\u82f1\u683c\u5170\u683c\u6797\u5a01\u6cbb\u4e00\u6837\u3002\u96f6\u8d64\u7ecf\u662f\u592a\u9633\uff08\u5728\u9ec4\u9053\u4e0a\uff09\u5728\u6625\u5929\u4ece\u5357\u5230\u5317\u7a7f\u8d8a\u5929\u7a7a\u7a7f\u8fc7\u5929\u8d64\u9053\u7684\u70b9\u3002\u5728\u4e09\u4e2a\u7ef4\u5ea6\u4e0a\uff0c\u6625\u5206\u70b9\u662f\u5730\u7403\u8d64\u9053\u5e73\u9762\u4e0e\u5730\u7403\u8f68\u9053\u5e73\u9762\uff08\u9ec4\u9053\u5e73\u9762\uff09\u76f8\u4ea4\u7684\u7ebf\u7684\u65b9\u5411\u3002\u7531\u4e8e\u5730\u7403\u7684\u65b9\u4f4d\u76f8\u5bf9\u4e8e\u6052\u661f\u4e0d\u65ad\u53d8\u5316\uff0c\u56e0\u6b64\u6625\u5206\u7684\u4f4d\u7f6e\u4e5f\u662f\u5982\u6b64\u3002<br><br>\u5728\u5b9e\u8df5\u4e2d\uff0c\u5929\u4f53\u5750\u6807\u4e0e\u89c2\u5bdf\u5230\u7684\u7269\u4f53\u76f8\u5173\u8054\uff0c\u56e0\u4e3a\u6625\u5206\u70b9\u7684\u4f4d\u7f6e\u5f88\u96be\u76f4\u63a5\u6d4b\u91cf\u3002B1950\u5750\u6807\u7f51\u683c\u4f4d\u7f6e\u7531\u7b2c\u56db\u672c\u300a\u57fa\u7840\u76ee\u5f55\u300bFK4\u4e2d\u6052\u661f\u7684\u53d1\u5e03\u4f4d\u7f6e\u5b9a\u4e49\uff0cJ2000\u7cfb\u7edf\u4ee5FK5\u4e3a\u57fa\u7840\u3002\u8fd9\u4e9b\u76ee\u5f55\u4e3b\u8981\u5217\u51fa\u4e86\u9644\u8fd1\u7684\u6052\u661f\uff0c\u56e0\u6b64\u4e0e\u8fd9\u4e9b\u76ee\u5f55\u76f8\u5173\u7684\u4efb\u4f55\u5750\u6807\u5b9a\u4e49\u90fd\u4f1a\u56e0\u5929\u7a7a\u4e2d\u6052\u661f\u7684\u8fd0\u52a8\u800c\u51fa\u73b0\u9519\u8bef\u3002\u73b0\u5728\u5df2\u77e5 FK4 \u6625\u5206\u70b9\u76f8\u5bf9\u4e8e FK5 \u6625\u5206\u70b9\u6bcf\u4e16\u7eaa\u6f02\u79fb\u7ea6 0.085 \u89d2\u79d2\uff0c\u8fd9\u5728 VLBI\uff08\u8d85\u5927\u57fa\u5e72\u6d89\u6d4b\u91cf\uff09\u6807\u51c6\u4e0b\u76f8\u5f53\u5927\uff0c\u4f46\u5bf9\u4e8e\u57fa\u4e8e\u7b80\u5355\u5149\u5b66\u89c2\u6d4b\u7684\u5e94\u7528\u6ca1\u6709\u5b9e\u9645\u610f\u4e49\u3002\u76ee\u524d\uff0cJ2000 \u5750\u6807\uff08X\u3001Y\u3001Z \u8f74\uff09\u6700\u7a33\u5b9a\u7684\u5b9a\u4e49\u662f\u57fa\u4e8e&nbsp;<a href=\"http:\/\/rorf.usno.navy.mil\/rorf.html\">\u65e0\u7ebf\u7535\u5149\u5b66\u53c2\u8003<\/a>\u7cfb (RORF) \u4e2d\u7ea6 400 \u4e2a\u6cb3\u5916\u5929\u4f53\u7684\u5b9a\u4e49\u3002\uff08<strong>\u6ce8\u610f\uff1a\u65e0\u7ebf\u7535\u5149\u5b66\u53c2\u8003\u6846\u67b6\u5728 1998 \u5e74 1 \u6708\u88ab<\/strong><a href=\"https:\/\/www.siranah.de\/html\/sail040x.htm\">\u201c\u56fd\u9645\u5929\u4f53\u53c2\u8003\u6846\u67b6 (ICRF)<\/a>\u53d6\u4ee3&nbsp;\uff0c\u4f46\u5b83\u7684\u5b9e\u73b0\u4f7f\u5f97 &#8211; \u5bf9\u4e8e\u5927\u591a\u6570\u5b9e\u9645\u5e94\u7528 &#8211; \u5b83\u4e0e J2000 \u7cfb\u7edf\u201c\u517c\u5bb9\u201d\uff09\u3002RORF \u662f\u7a33\u5b9a\u5728\u6bcf\u4e16\u7eaa\u81f3\u5c11 0.020 \u89d2\u79d2\uff0c\u5e76\u4e14\u968f\u7740\u66f4\u597d\u7684\u89c2\u6d4b\u548c\u66f4\u957f\u7684\u65f6\u95f4\u57fa\u51c6\u800c\u4e0d\u65ad\u6539\u5584\u3002\u5b8c\u6574\u7684 400 \u4e2a\u7269\u4f53\u7684\u5b9a\u4f4d\u7cbe\u5ea6\u7ea6\u4e3a 0.0005 \u89d2\u79d2\u3002<br><br>\u7531\u4e8e\u90e8\u5206\u5386\u53f2\u539f\u56e0\u548c\u90e8\u5206\u5b9e\u9645\u539f\u56e0\uff0c\u5730\u7403\u81ea\u8f6c\u8f74\u65b9\u5411\u7684\u65f6\u95f4\u53d8\u5316\u4ee5\u53ca\u5929\u6587\u53f0\u4e0e\u5176\u4e4b\u95f4\u7684\u5173\u7cfb\u5206\u4e3a\u56db\u4e2a\u90e8\u5206\uff1a&nbsp;<strong>\u5c81\u5dee<\/strong>\u3001<strong>\u7ae0\u52a8<\/strong>\u3001<strong>\u5929\u6781\u504f\u79fb<\/strong>\u548c<strong>\u6781\u79fb<\/strong>\u3002\u6839\u636e\u5b9a\u4e49\uff0c\u8fdb\u52a8\u548c\u7ae0\u52a8\u662f\u901a\u8fc7\u91c7\u7528\u6700\u4f73\u53ef\u7528\u65b9\u7a0b\u5728\u6570\u5b66\u4e0a\u5b9a\u4e49\u7684\u3002\u5929\u6781\u504f\u79fb\u548c\u6781\u5730\u8fd0\u52a8\u662f\u4ece\u6570\u5b66\u516c\u5f0f\u4e2d\u89c2\u5bdf\u5230\u7684\u504f\u79fb\uff0c\u5e76\u4e14\u5728\u5f88\u957f\u4e00\u6bb5\u65f6\u95f4\u5185\u662f\u4e0d\u53ef\u9884\u6d4b\u7684\u3002\u4e0b\u9762\u66f4\u8be6\u7ec6\u5730\u63cf\u8ff0\u6240\u6709\u56db\u4e2a\u7ec4\u4ef6\u3002<br>\u5c81\u5dee\u5730\u7403\u8f68\u9053\u5e73\u9762\u3001\u9ec4\u9053\u5e73\u9762\u548c\u5730\u7403\u8d64\u9053\u5e73\u9762\u90fd\u4e0d\u662f\u76f8\u5bf9\u4e8e\u8fdc\u5904\u7269\u4f53\u56fa\u5b9a\u7684\u3002\u4e3b\u5bfc\u8fd0\u52a8\u662f\u5730\u7403\u6781\u8f74\u7ed5\u9ec4\u9053\u7684\u8fdb\u52a8\uff0c\u4e3b\u8981\u662f\u7531\u4e8e\u6708\u7403\u548c\u592a\u9633\u5bf9\u5730\u7403\u4ea7\u751f\u7684\u626d\u77e9\u3002\u5730\u8f74\u5728 26,000 \u5e74\u5185\u626b\u8fc7\u4e00\u4e2a\u534a\u89d2\u4e3a 23.5 \u5ea6\u7684\u5706\u9525\u4f53\u3002<br><br>\u9ec4\u9053\u6781\u79fb\u52a8\u5f97\u66f4\u6162\u3002\u5982\u679c\u6211\u4eec\u60f3\u8c61\u4e24\u6781\u76f8\u5bf9\u4e8e\u975e\u5e38\u9065\u8fdc\u7684\u7269\u4f53\u7684\u8fd0\u52a8\uff0c\u5730\u7403\u7684\u4e24\u6781\u6bcf\u5e74\u79fb\u52a8\u7ea6 20 \u89d2\u79d2\uff0c\u9ec4\u9053\u6781\u6bcf\u5e74\u79fb\u52a8\u7ea6 0.5 \u89d2\u79d2\u3002\u8054\u5408\u8fd0\u52a8\u53ca\u5176\u5bf9\u6625\u5206\u4f4d\u7f6e\u7684\u5f71\u54cd\u79f0\u4e3a\u4e00\u822c\u5c81\u5dee\u3002\u5730\u7403\u8f74\u4e0e\u5176\u957f\u671f\u5c81\u5dee\u7684\u53ef\u9884\u6d4b\u77ed\u671f\u504f\u5dee\u79f0\u4e3a\u7ae0\u52a8\uff0c\u4e0b\u4e00\u8282\u5c06\u5bf9\u6b64\u8fdb\u884c\u89e3\u91ca\u3002<br><br>\u7528\u4e8e\u8ba1\u7b97 2000 \u5e74\u7ea6 20 \u5e74\u5185\u7ed9\u5b9a\u65e5\u671f\u5bf9\u8d64\u7ecf\u548c\u8d64\u7eac\u7684\u8fdb\u52a8\u6821\u6b63\u7684\u65b9\u7a0b\uff0c\u7cbe\u786e\u5230 1 \u89d2\u79d2 RA [s] = RA(2000) + (3.075 + 1.336 * sin(RA) * tan(Dec)) * T ys Dec [&#8220;] = Dec(2000) + 20.04 * cos(RA) * T ys \u5176\u4e2d T&nbsp;ys\u662f\u4ece 2000 \u5e74 1 \u6708 1 \u65e5\u5f00\u59cb\u7684\u5c0f\u6570\u5e74\u65f6\u95f4\uff0cRA \u548c Dec \u4e2d\u7684\u504f\u79fb\u91cf\u5206\u522b\u4ee5\u65f6\u95f4\u79d2\u548c\u5f27\u79d2\u4e3a\u5355\u4f4d\u3002\u5782\u5934\u5730\u7403\u81ea\u8f6c\u8f74\u5728\u5c0f\u4e8e 300 \u5e74\u7684\u65f6\u95f4\u5c3a\u5ea6\u4e0a\u7684\u53ef\u9884\u6d4b\u8fd0\u52a8\u5728\u7ae0\u52a8\u4e0b\u7ec4\u5408\u5728\u4e00\u8d77\u3002\u8fd9\u53ef\u4ee5\u88ab\u8ba4\u4e3a\u662f\u5bf9\u5c81\u5dee\u7684\u4e00\u9636\u4fee\u6b63\u3002\u76ee\u524d\u7684\u6807\u51c6\u7ae0\u52a8\u7406\u8bba\u7531 106 \u4e2a\u975e\u8c10\u6ce2\u76f8\u5173\u7684\u6b63\u5f26\u548c\u4f59\u5f26\u5206\u91cf\u7ec4\u6210\uff0c\u4e3b\u8981\u662f\u7531\u4e8e\u6765\u81ea\u592a\u9633\u548c\u6708\u7403\u7684\u4e8c\u9636\u626d\u77e9\u6548\u5e94\uff0c\u52a0\u4e0a 85 \u4e2a\u884c\u661f\u6821\u6b63\u9879\u3002\u7ae0\u52a8\u7684\u56db\u4e2a\u4e3b\u8981\u5468\u671f\u662f18.6\u5e74\uff08\u6708\u7403\u8f68\u9053\u8fdb\u52a8\u5468\u671f\uff09\u3001182.6\u5929\uff08\u534a\u5e74\uff09\u300113.7\u5929\uff08\u534a\u4e2a\u6708\uff09\u548c9.3\u5e74\uff08\u6708\u7403\u8fd1\u5730\u70b9\u81ea\u8f6c\u5468\u671f\uff09\u3002<br><br>\u4ee5\u4e0b\u7ae0\u52a8\u7684\u8fd1\u4f3c\u503c\u9002\u7528\u4e8e\u5927\u7ea6\u4e00\u79d2\u548c\u4e00\u89d2\u79d2\u3002 delta RA [s] = (0.9175 + 0.3978 * sin(RA) * tan(Dec)) * dL &#8211; cos(RA) * tan(Dec) * dE delta Dec [&#8220;] = 0.3978 * cos(RA) * dL + sin(RA) * dE \u5176\u4e2d delta RA \u548c delta Dec \u88ab\u6dfb\u52a0\u5230\u5e73\u5747\u5750\u6807\u4ee5\u83b7\u5f97\u89c6\u5750\u6807\uff0c\u800c\u7ecf\u5ea6 dL \u548c\u9ec4\u9053\u503e\u89d2 dE \u7684\u7ae0\u52a8\u53ef\u4ee5\u5728\u5929\u6587\u5e74\u5386\u4e2d\u627e\u5230\uff0c\u6216\u8005\u4ece\u4e00\u822c\u7684\u4e24\u4e2a\u6700\u5927\u9879\u8ba1\u7b97\u7406\u8bba\uff1a dL = -17.3 * sin(125.0 &#8211; 0.05295 * d) &#8211; 1.4 * sin(200.0 + 1.97129 * d) dE = 9.4 * cos(125.0 &#8211; 0.05295 * d) + 0.7 * cos(200.0 + 1.97129 * d) \u5176\u4e2d d = Julian Date &#8211; 2451545.0\uff0c\u6b63\u5f26\u548c\u4f59\u5f26\u53c2\u6570\u4ee5\u5ea6\u4e3a\u5355\u4f4d\uff0cdL \u548c dE \u4ee5\u5f27\u79d2\u4e3a\u5355\u4f4d\u3002\u5929\u6781\u504f\u79fb\u5929\u6781\u504f\u79fb\u662f\u7ae0\u52a8\u4e2d\u4e0d\u53ef\u9884\u6d4b\u7684\u90e8\u5206\u3002\u8fd9\u4e9b\u504f\u79fb\u91cf\u5728&nbsp;<a href=\"ftp:\/\/maia.usno.navy.mil\/ser7\/ser7.dat\">IERS Bulletin A<\/a>\u4e2d\u4f5c\u4e3a dL \u548c dE \u7684\u504f\u79fb\u91cf\u53d1\u5e03\u3002\u5bf9\u4e8e\u671b\u8fdc\u955c\u6307\u5411\u6765\u8bf4\uff0c\u5b83\u4eec\u5e76\u4e0d\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u4eec\u53ea\u6709 0.03 \u89d2\u79d2\u7684\u6570\u91cf\u7ea7\u3002\u6781\u5730\u8fd0\u52a8\u7531\u4e8e\u5730\u7403\u7684\u5185\u90e8\u8fd0\u52a8\u548c\u5f62\u72b6\u53d8\u5f62\uff0c\u7531\u5730\u7403\u8868\u9762\u4e0a\u4e00\u7ec4\u5929\u6587\u53f0\u7684\u4f4d\u7f6e\u5b9a\u4e49\u7684\u8f74\u76f8\u5bf9\u4e8e\u5b9a\u4e49\u5929\u6781\u7684\u65cb\u8f6c\u8f74\u5e76\u4e0d\u56fa\u5b9a\u3002\u4e00\u4e2a\u8f74\u76f8\u5bf9\u4e8e\u53e6\u4e00\u4e2a\u8f74\u7684\u8fd0\u52a8\u79f0\u4e3a\u6781\u8fd0\u52a8\u3002\u5bf9\u4e8e\u7279\u5b9a\u7684\u5929\u6587\u53f0\uff0c\u5b83\u5177\u6709\u6539\u53d8\u5929\u6587\u53f0\u7684\u6709\u6548\u7eac\u5ea6\u7684\u6548\u679c\uff0c\u7528\u4e8e\u4ece\u5730\u9762\u5750\u6807\u5230\u5929\u4f53\u5750\u6807\u7684\u8f6c\u6362\u3002\u56fd\u9645\u5730\u7403\u81ea\u8f6c\u670d\u52a1\u5bf9\u5730\u7403\u53c2\u8003\u7cfb\u8f74\u7684\u5b9a\u4e49\u79f0\u4e3a&nbsp;<a href=\"ftp:\/\/maia.usno.navy.mil\/ser7\/iersexp.sup\">IERS \u53c2\u8003\u6781 (IRP)<\/a>&nbsp;\uff0c\u7531\u5176\u5929\u6587\u53f0\u96c6\u5408\u5b9a\u4e49\u3002<br><br>\u6781\u5730\u8fd0\u52a8\u7684\u4e3b\u8981\u6210\u5206\uff0c\u79f0\u4e3a\u94b1\u5fb7\u52d2\u6446\u52a8\uff0c\u662f IRP \u56f4\u7ed5\u5929\u6781\u7684\u5927\u81f4\u5706\u5468\u8fd0\u52a8\uff0c\u5e45\u5ea6\u7ea6\u4e3a 0.7 \u89d2\u79d2\uff0c\u5468\u671f\u7ea6\u4e3a 14 \u4e2a\u6708\u3002\u7531\u4e8e\u5730\u7403\u7684\u5185\u90e8\u8fd0\u52a8\uff0c\u66f4\u77ed\u548c\u66f4\u957f\u7684\u65f6\u95f4\u5c3a\u5ea6\u7684\u4e0d\u89c4\u5219\u6027\u662f\u4e0d\u53ef\u9884\u6d4b\u7684\uff0c\u5fc5\u987b\u901a\u8fc7\u89c2\u5bdf\u6765\u76d1\u6d4b\u3002\u94b1\u5fb7\u52d2\u6446\u52a8\u548c\u6781\u5730\u8fd0\u52a8\u7684\u4e0d\u89c4\u5219\u5206\u91cf\u7684\u603b\u548c\u6bcf\u5468\u5728&nbsp;<a href=\"ftp:\/\/maia.usno.navy.mil\/ser7\/ser7.dat\">IERS \u516c\u544a A<\/a>\u4e0a\u53d1\u5e03\uff0c\u4ee5\u53ca\u5bf9\u672a\u6765\u51e0\u4e2a\u6708\u7684\u9884\u6d4b\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n<div class=\"clearfix\"><\/div>","protected":false},"excerpt":{"rendered":"<p>\u592a\u9633\u7cfb\u661f\u5386\u8868Ephemeris\uff08\u590d\u6570\uff1aephemerides 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