| GPS广播星历误差及其对导航定位精度的影响 |
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| 引用本文： | 帅平,陈定昌,江涌.GPS广播星历误差及其对导航定位精度的影响[J].数据采集与处理,2004,19(1):107-110. |
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| 作者姓名： | 帅平 陈定昌 江涌 |
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| 作者单位： | 1. 中国航天科技集团第五研究院,北京,100086
2. 中国航天科工集团第二研究院,北京,100854 |
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| 基金项目： | 国家 8 63高技术 (GA2 .1 -0 1 -0 2 )资助项目 |
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| 摘 要： | 利用国际GPS地球动力学服务(International GPS service (IGS)for geodynamics)提供的广播星历和精密星历数据，全面分析GPS卫星轨道及其钟差修正量误差的变化规律。前者具有6h的短周期正弦波动和1个GPS周的长周期线性递增特性；后者以12h为周期作正弦波动变化，这对用户导航定位精度将产生周期性影响。若使用IGS预报星历代替广播星历数据进行导航定位计算，可以使定位精度提高5m。
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| 关 键 词： | 全球定位系统 卫星轨道 GPS 广播星历误差 导航定位精度 |
| 文章编号： | 1004-9037(2004)01-0107-04 |
| 修稿时间： | 2003年6月12日 |
Errors of GPS Broadcast Ephemerides and Their Effects on Navigation and Positioning Accuracy |
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| SHUAI Ping ,CHEN Ding-chang ,JIANG Yong.Errors of GPS Broadcast Ephemerides and Their Effects on Navigation and Positioning Accuracy[J].Journal of Data Acquisition & Processing,2004,19(1):107-110. |
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| Authors: | SHUAI Ping CHEN Ding-chang JIANG Yong |
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| Affiliation: | SHUAI Ping 1,CHEN Ding-chang 2,JIANG Yong 2 |
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| Abstract: | Using the broadcast ephemerides and precision ones provided by the international GPS service for geodynamics (IGS), the change law of the orbit the errors and the corrected clock errors of GPS satellites can be analyzed. The former possesses the features of 6 h short period sine waving and one GPS-week long period linear increasing. The latter, has only the sine wave features of 12 h period. Therefore, they have also an periodical effect on user navigation and positioning accuracy. If IGS predicting ephemerides are applied to navigation calculation instead of the broadcast ones, the positioning accuracy can be increased by 5 m. |
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| Keywords: | global positioning system navigation and positioning accuracy broadcast ephemeris precision ephemeris |
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