| GPS广播星历参数拟合算法的探讨 |
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| 引用本文： | 崔先强,焦文海,秦显平.GPS广播星历参数拟合算法的探讨[J].测绘科学,2006,31(1):25-26,48. |
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| 作者姓名： | 崔先强 焦文海 秦显平 |
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| 作者单位： | 西安测绘研究所,西安,710054 |
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| 基金项目： | 国家863青年创新基金项目(2002AA717011)，国家自然科学基金项目(40274002和40474001) |
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| 摘 要： | 介绍了全球定位系统(GPS)的广播星历参数拟合算法,在推导卫星位置对GPS广播星历参数偏导数的基础上,导出了调和项对偏导数的影响函数。计算结果表明,考虑调和项并不能提高GPS广播星历参数拟合的精度和效率,实际应用时应忽略调和项的影响。
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| 关 键 词： | 全球定位系统 广播星历 调和项 偏导数 影响函数 |
| 文章编号： | 1009-2307（2006）01-0025-03 |
| 收稿时间： | 2004-07-16 |
| 修稿时间： | 2004-07-16 |
Discussion on the fitting of GPS broadcast ephemeris parameters |
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| CUI Xian-qiang,JIAO Wen-hai,QIN Xian-ping.Discussion on the fitting of GPS broadcast ephemeris parameters[J].Science of Surveying and Mapping,2006,31(1):25-26,48. |
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| Authors: | CUI Xian-qiang JIAO Wen-hai QIN Xian-ping |
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| Abstract: | After a review of the fitting of GPS broadcast ephemeris parameters, the influence function (IF) of the harmony term (HT) to the partial derivative is presented based on the partial derivative of satellite position with respect to ephemeris parameters. The results indicate that taking into account harmony terms cannot improve the precision and efficiency of GPS broadcast ephemeris parameter fitting, so the harmony term can be ignored in application. |
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| Keywords: | GPS broadcast ephemeris harmony term partial derivative influence function |
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