| GPS卫星伪广播星历技术研究 |
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| 引用本文： | 何丽娜,王解先.GPS卫星伪广播星历技术研究[J].海洋测绘,2008,28(4):11-14. |
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| 作者姓名： | 何丽娜 王解先 |
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| 作者单位： | 1. 同济大学,测量与国土信息工程系,上海,200092
2. 同济大学,测量与国土信息工程系,上海,200092;现代工程测量国家测绘局重点实验室,上海,200092 |
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| 摘 要： | 通过GPS广播星历求出一个时间段内间隔一定时间的离散卫星三维坐标，以这些卫星坐标序列为已知数据反求星历参数的方法，论述和验证了当卫星坐标发生旋转变化时，解算得到的相应地面点坐标的旋转矩阵与卫星坐标发生旋转变化的矩阵具有相同的值。这对于实现GPS加密具有很大的意义。
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| 关 键 词： | 广播星历参数 拟合 最小二乘 单点定位 |
Research on GPS Satellite Pseudo Broadcast Ephemeris Technology |
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| HE Li-n,WANG Jie-xian.Research on GPS Satellite Pseudo Broadcast Ephemeris Technology[J].Hydrographic Surveying and Charting,2008,28(4):11-14. |
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| Authors: | HE Li-n WANG Jie-xian |
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| Institution: | HE Li-na ,WANG Jie-xia(1. Department of Surveying and Geoinformatics of Tongji University ,Shanghai,200092; 2. Key Laboratory of Advanced Engineering Survey of SBSM,Shanghai,200092) |
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| Abstract: | In this paper an approach of fitting GPS broadcast ephemeris parameters based on a series of known satellite coordinates through the least-square algorithm is introduced.Then we discuss the results of Single Point Positioning when the satellite coordinates are rotated.Numerical tests show that the positioning results rotated have the same angle as that of satellite coordinates.This research is valuable for GPS encryption. |
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| Keywords: | broadcast ephemeris parameters fitting least-square single point positioning |
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