| GPS定位中卫星坐标计算的曲线拟合法 |
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| 引用本文： | 陈逸群,胡丛玮,杨欢庆.GPS定位中卫星坐标计算的曲线拟合法[J].测绘工程,2000,9(2):40-44,78. |
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| 作者姓名： | 陈逸群 胡丛玮 杨欢庆 |
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| 作者单位： | 1. 同济大学
2. 上海市城建设计研究院 |
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| 摘 要： | 在ＧＰＳ单点定位和相对定位中都需要不断计算卫星的坐标。卫星的坐标是根据接收到的广播星厍来计算的。在后处理中也可以用精密星历来计算卫生坐标。而每次计算卫星坐标都需要占用大量内存和时间,影响计算好曲线拟合法的基本模型,讨论了知识垢多项式算法,通过对实际观测数据的处理表明采用正交多项式拟合效果最好。另外还就曲线拟合的取样点和多项式的阶数等问题进行了讨论。
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| 关 键 词： | 曲线拟合 广播星厍 卫星坐标 曲线拟合法 |
The Curve-Fitting Model for GPS Orbit Calculation |
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| Chen Yiqun,Hu Congwei,Yang Huanqing.The Curve-Fitting Model for GPS Orbit Calculation[J].Engineering of Surveying and Mapping,2000,9(2):40-44,78. |
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| Authors: | Chen Yiqun Hu Congwei Yang Huanqing |
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| Abstract: | It is important to get the coordinates of the satellites continually in the GPS single point and relative positioning. The coordinates of the satellites are got according to the boradcast ephemeris received. It can also be got in th post processing according to the precise ephemeris. But a lot of memory and time is engrossed in order to get the coordinates of the satellites. This paper introduces the basic model of the curve fitting, discusses the polynomial arithmetic adapting to the computation of the coordinates. By processing of the observation data the precision of millimeter is achieved. In addition this paper discusses the problem of the sample point and the rank of polynomial of Curve fittng model. |
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| Keywords: | Curve fitting Broadcast ephemeris Coordinates of the satellites |
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