\u76ee\u5f55<\/p>\n\n\n\n
\u5728\u8ba1\u7b97 GPS \u536b\u661f\u4f4d\u7f6e\u65f6\uff0c\u7406\u89e3\u53c2\u8003\u7cfb\u548c\u65f6\u95f4\u53c2\u6570\u81f3\u5173\u91cd\u8981\uff0c\u7279\u522b\u662f\u5173\u4e8e \u5347\u4ea4\u70b9\u8d64\u7ecf\uff08Right Ascension of Ascending Node, RAAN\uff09<\/strong> \u7684\u5904\u7406\u3002<\/p>\n\n\n\n Screenshot-[01:06]<\/em><\/p>\n\n\n\n \u622a\u56fe\u8bf4\u660e<\/strong>\uff1a\u89c6\u9891\u5c55\u793a\u4e86\u6625\u5206\u70b9\u3001\u683c\u6797\u5c3c\u6cbb\u5b50\u5348\u7ebf\u968f\u65f6\u95f4\u53d8\u5316\u7684\u89d2\u5ea6\u5173\u7cfb\uff0c\u89e3\u91ca\u4e86\u5730\u7403\u81ea\u8f6c\u89d2\u901f\u5ea6 \\dot{\\Omega}_e \u5982\u4f55\u5f71\u54cd\u89d2\u5ea6\u8ba1\u7b97\u3002<\/p>\n<\/blockquote>\n\n\n\n \u4e3a\u4e86\u65b9\u4fbf\u8ba1\u7b97\u536b\u661f\u5728\u5730\u56fa\u5750\u6807\u7cfb\uff08ECEF\uff09\u4e2d\u7684\u4f4d\u7f6e\uff0c\u9700\u8981\u6c42\u51fa\u89c2\u6d4b\u65f6\u523b t \u5347\u4ea4\u70b9\u76f8\u5bf9\u4e8e\u683c\u6797\u5c3c\u6cbb\u5b50\u5348\u7ebf\u7684\u7ecf\u5ea6 \\Omega_k\u3002<\/p>\n\n\n\n Screenshot-[05:50]<\/em><\/p>\n\n\n\n \u622a\u56fe\u8bf4\u660e<\/strong>\uff1a\u56fe\u793a\u8be6\u7ec6\u89e3\u6790\u4e86\u89d2\u5ea6\u5173\u7cfb\uff1a\\Omega\uff08\u5927Omega\uff09\u662f\u4ece\u6625\u5206\u70b9\u5230\u5347\u4ea4\u70b9\u7684\u89d2\u5ea6\uff08\u8d64\u7ecf\uff09\uff0c\u800c\u6211\u4eec\u9700\u8981\u7684\u662f\u4ece\u683c\u6797\u5c3c\u6cbb\u5b50\u5348\u7ebf\u5230\u5347\u4ea4\u70b9\u7684\u89d2\u5ea6\uff08\u7ecf\u5ea6 \\lambda \u6216 \\Omega_k\uff09\u3002\u56fe\u89e3\u5c55\u793a\u4e86\u5982\u4f55\u901a\u8fc7\u51cf\u53bb\u683c\u6797\u5c3c\u6cbb\u6052\u661f\u65f6\u6765\u5b9e\u73b0\u8fd9\u4e00\u8f6c\u6362\u3002<\/p>\n<\/blockquote>\n\n\n\n \u5229\u7528\u5bfc\u822a\u7535\u6587\u63d0\u4f9b\u7684 16 \u4e2a\u53c2\u6570\uff086\u4e2a\u8f68\u9053\u6839\u6570 + 9\u4e2a\u6444\u52a8\u53c2\u6570 + \u53c2\u8003\u65f6\u95f4 t_{oe}\uff09\uff0c\u8ba1\u7b97\u536b\u661f\u5728 WGS-84 \u5750\u6807\u7cfb\u4e0b\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n GPS \u536b\u661f\u53d7\u6444\u52a8\u5f71\u54cd\uff0c\u8f68\u9053\u4e0d\u662f\u5b8c\u7f8e\u7684\u692d\u5706\u3002\u9700\u8981\u8ba1\u7b97\u4e09\u4e2a\u65b9\u5411\u7684\u5468\u671f\u6027\u6539\u6b63\u9879\uff08\u5229\u7528\u4e8c\u500d\u89d2 2\\Phi_k\uff09\uff1a<\/p>\n\n\n\n 1. \u5347\u4ea4\u8ddd\u89d2\u6539\u6b63 \\delta u_k<\/strong>\uff1a Screenshot-[17:42]<\/em><\/p>\n\n\n\n \u622a\u56fe\u8bf4\u660e<\/strong>\uff1a\u5c55\u793a\u4e86\u5229\u7528 C_{uc}, C_{us}, C_{rc}, C_{rs}, C_{ic}, C_{is} \u8fdb\u884c\u5468\u671f\u6027\u6444\u52a8\u6539\u6b63\u7684\u516c\u5f0f\u5217\u8868\u3002<\/p>\n<\/blockquote>\n\n\n\n Screenshot-[19:56]<\/em><\/p>\n\n\n\n \u622a\u56fe\u8bf4\u660e<\/strong>\uff1a\u8f68\u9053\u5e73\u9762\u793a\u610f\u56fe\uff0c\u6e05\u6670\u6807\u6ce8\u4e86\u8fd1\u5730\u70b9\u3001\u5347\u4ea4\u70b9\u3001\u771f\u8fd1\u70b9\u89d2 f\u3001\u8fd1\u5730\u70b9\u89d2\u8ddd \\omega \u4ee5\u53ca\u536b\u661f\u4f4d\u7f6e\u3002<\/p>\n<\/blockquote>\n\n\n\n Screenshot-[25:30]<\/em><\/p>\n\n\n\n \u622a\u56fe\u8bf4\u660e<\/strong>\uff1a\u6700\u7ec8\u7684\u5750\u6807\u8f6c\u6362\u516c\u5f0f\u77e9\u9635\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5c06\u8f68\u9053\u5e73\u9762\u5750\u6807 (x’, y’) \u8f6c\u6362\u4e3a\u5927\u5730\u5750\u6807 (X, Y, Z)\u3002<\/p>\n<\/blockquote>\n\n\n\n\n
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2. \u5347\u4ea4\u70b9\u7ecf\u5ea6 \\Omega_k \u7684\u8ba1\u7b97\u539f\u7406 \u539f\u7247 @ 02:27<\/a>*<\/h2>\n\n\n\n
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\u4efb\u4f55\u65f6\u523b\u7684\u5347\u4ea4\u70b9\u8d64\u7ecf \\Omega(t) \u53ef\u4ee5\u8868\u793a\u4e3a\uff1a
\\Omega(t) = \\Omega_{t_{oe}} + \\dot{\\Omega}(t – t_{oe}) \u5176\u4e2d \\dot{\\Omega} \u662f\u5347\u4ea4\u70b9\u8d64\u7ecf\u7684\u53d8\u5316\u7387\uff08\u7531\u5730\u7403\u6241\u7387\u7b49\u6444\u52a8\u56e0\u7d20\u5f15\u8d77\uff0c\u5bfc\u822a\u7535\u6587\u5df2\u7ed9\u51fa\uff09\u3002<\/li>\n\n\n\n
\u89c2\u6d4b\u65f6\u523b\u7684\u5347\u4ea4\u70b9\u7ecf\u5ea6\uff08\u5728\u5927\u5730\u5750\u6807\u7cfb\u4e2d\uff09\u9700\u51cf\u53bb\u5f53\u524d\u7684\u683c\u6797\u5c3c\u6cbb\u6052\u661f\u65f6\uff08GAST\uff09\u3002
\\Omega_k = \\Omega_{t_{oe}} + \\dot{\\Omega} \\cdot \\Delta t – (GAST_{week\\_start} + \\dot{\\Omega}_e \\cdot t_{total}) \u4e3a\u4e86\u7b80\u5316\u8ba1\u7b97\uff0c\u5bfc\u822a\u7535\u6587\u4e2d\u7684 \\Omega_0 \u5b9e\u9645\u4e0a\u5df2\u7ecf\u5305\u542b\u4e86\u90e8\u5206\u9879\u3002<\/li>\n\n\n\n
\\Omega_k = \\Omega_0 + (\\dot{\\Omega} – \\dot{\\Omega}_e)t_k – \\dot{\\Omega}_e t_{oe}\n\n
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3. \u536b\u661f\u4f4d\u7f6e\u8ba1\u7b97\u6b65\u9aa4\u8be6\u89e3\uff08\u57fa\u4e8e\u5e7f\u64ad\u661f\u5386\uff09 \u539f\u7247 @ 10:10<\/a>*<\/h2>\n\n\n\n
3.1 \u8ba1\u7b97\u5e73\u5747\u8fd0\u52a8\u89d2\u901f\u5ea6 \u539f\u7247 @ 11:00<\/a>*<\/h3>\n\n\n\n
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n_0 = \\sqrt{\\frac{GM}{A^3}}\n\n
n = n_0 + \\Delta n\n\n
3.2 \u8ba1\u7b97\u5e73\u8fd1\u70b9\u89d2\u4e0e\u504f\u8fd1\u70b9\u89d2 \u539f\u7247 @ 12:49<\/a>*<\/h3>\n\n\n\n
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M_k = M_0 + n \\cdot t_k\n\n
M_k = E_k – e \\sin E_k\n\n
3.3 \u8ba1\u7b97\u771f\u8fd1\u70b9\u89d2\u4e0e\u5347\u4ea4\u8ddd\u89d2 \u539f\u7247 @ 14:06<\/a>*<\/h3>\n\n\n\n
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\u5229\u7528\u51e0\u4f55\u5173\u7cfb\u6216\u516c\u5f0f\u7531 E_k \u6c42\u5f97\u3002
\\tan \\frac{f_k}{2} = \\sqrt{\\frac{1+e}{1-e}} \\tan \\frac{E_k}{2}<\/li>\n\n\n\n
\\Phi_k = \\omega + f_k\n\n
3.4 \u6444\u52a8\u6539\u6b63\u4e0e\u4e8c\u4f53\u95ee\u9898\u4fee\u6b63 \u539f\u7247 @ 16:50<\/a>*<\/h3>\n\n\n\n
\\delta u_k = C_{uc} \\cos(2\\Phi_k) + C_{us} \\sin(2\\Phi_k) 2. \u5411\u5f84\uff08\u8ddd\u79bb\uff09\u6539\u6b63 \\delta r_k<\/strong>\uff1a
\\delta r_k = C_{rc} \\cos(2\\Phi_k) + C_{rs} \\sin(2\\Phi_k) 3. \u8f68\u9053\u503e\u89d2\u6539\u6b63 \\delta i_k<\/strong>\uff1a
\\delta i_k = C_{ic} \\cos(2\\Phi_k) + C_{is} \\sin(2\\Phi_k)<\/p>\n\n\n\n\n
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4. \u5750\u6807\u8f6c\u6362\uff1a\u4ece\u8f68\u9053\u5e73\u9762\u5230\u5730\u56fa\u5750\u6807\u7cfb \u539f\u7247 @ 19:28<\/a>*<\/h2>\n\n\n\n
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\u539f\u70b9\u5728\u5730\u7403\u8d28\u5fc3\uff08\u692d\u5706\u7126\u70b9\uff09\uff0cx’ \u6307\u5411\u5347\u4ea4\u70b9\uff0cy’ \u5728\u8f68\u9053\u5e73\u9762\u5185\u5782\u76f4\u4e8e x’\u3002
x’_k = r_k \\cos u_k y’_k = r_k \\sin u_k<\/li>\n<\/ul>\n\n\n\n\n
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\u9700\u8981\u8fdb\u884c\u4e24\u6b21\u65cb\u8f6c\uff1a
X_k = x’_k \\cos \\Omega_k – y’_k \\cos i_k \\sin \\Omega_k Y_k = x’_k \\sin \\Omega_k + y’_k \\cos i_k \\cos \\Omega_k Z_k = y’_k \\sin i_k<\/li>\n<\/ul>\n\n\n\n\n
5. \u6781\u79fb\u4e0e\u5730\u7403\u81ea\u8f6c\u4e0d\u5747\u5300\u6027\u7684\u8ba8\u8bba \u539f\u7247 @ 26:01<\/a>*<\/h2>\n\n\n\n
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