| 差分GPS水下立体定位导航系统的时间测量 |
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| 引用本文： | 蔡艳辉,章传银,王泽民,程剑,秘金钟.差分GPS水下立体定位导航系统的时间测量[J].测绘科学,2006,31(2):25-26. |
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| 作者姓名： | 蔡艳辉 章传银 王泽民 程剑 秘金钟 |
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| 作者单位： | 中国测绘科学研究院大地所,北京,100039;中国船泊重工集团公司第七一五研究所,杭州,310012 |
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| 摘 要： | 差分GPS水下立体定位系统是通过测量同一水声信号到达不同浮标的时刻,计算水下收发机到各枚浮标的距离差,实现水下立体双曲线交会定位的。本文对水下立体定位导航系统的数学模型进行了推导。根据差分GPS水下立体定位导航系统的要求对GPS接收机时钟同步进行了详细分析,同时对GPS接收机接口数据输出和支持的三种时间测量方案进行了介绍,并对时间延迟进行了分析。
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| 关 键 词： | 差分GPS 水下立体定位导航系统 时间测量 浮标 |
| 文章编号： | 1009-2307(2006)02-0025-02 |
| 收稿时间： | 2005-06-24 |
| 修稿时间： | 2005年6月24日 |
Time measuring of under-water GPS positioning system |
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| CAI Yan-hui,ZHANG Chuan-yin,WANG Ze-min,CHENG Jian,BEI Jin-zhong.Time measuring of under-water GPS positioning system[J].Science of Surveying and Mapping,2006,31(2):25-26. |
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| Authors: | CAI Yan-hui ZHANG Chuan-yin WANG Ze-min CHENG Jian BEI Jin-zhong |
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| Abstract: | Under-water GPS positioning system uses distance difference between two ranges from target to GPS-buoys to resolve the target's position.The distance difference is calculated from time difference of the same signal arriving to the two buoys,therefore,time measuring is the key problem of Under-water GPS positioning system.In this paper,the positioning algorithm is developed and GPS time system is introduced.At the same time,the synchrony accuracy of GPS receivers is validated.Furthermore,three types of time measuring and delay time are shown in detail. |
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| Keywords: | differential GPS under-water GPS positioning system time measuring buoy |
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