| 山基无线电掩星模拟 |
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| 引用本文： | 张训械,曾桢,胡雄,张东娅.山基无线电掩星模拟[J].电波科学学报,2004,19(5):530-536. |
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| 作者姓名： | 张训械 曾桢 胡雄 张东娅 |
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| 作者单位： | 1. 中国科学院武汉物理与数学研究所,湖北,武汉,430071
2. 中国科学院空间科学与应用研究中心,北京,100080 |
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| 基金项目： | 中国科学院知识创新工程项目，国家自然科学基金 |
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| 摘 要： | 利用3维射线追踪技术模拟山基(或机载)无线电掩星,研究掩星事件出现的时间、方位角和掩星事件持续时间;详细研究了大气边界层水汽和温度变化对掩星观测高度、相位时延的影响;从CHAMP掩星观测结果分析,得到了地形对掩星观测高度有重要影响的新结论.研究结果对于解释大气边界层掩星观测信号中断和掩星观测高度变化是非常有益的.
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| 关 键 词： | 无线电掩星 山基掩星 |
| 文章编号： | 1005-0388(2004)05-0530-08 |
| 修稿时间： | 2003年7月25日 |
Simulation of the mountain-based radio occultation |
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| ZHANG Xun-xie,ZHEN Zhen,HU Xiong,ZHANG Dong-ya.Simulation of the mountain-based radio occultation[J].Chinese Journal of Radio Science,2004,19(5):530-536. |
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| Authors: | ZHANG Xun-xie ZHEN Zhen HU Xiong ZHANG Dong-ya |
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| Affiliation: | ZHANG Xun-xie 1 ZHEN Zhen 1 HU Xiong 2 ZHANG Dong-ya 1 |
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| Abstract: | In this paper, the mountain-based radio occultation is simulated using the 3D ray tracing technique. The starting time, the azimuth angle and the duration of the occultation events are obtained. The height and the excess phase variations of the occultation caused by water vapor and the temperature variety in the atmosphere boundary layer are studied in details. The influence of the geography on the height of the occultation is analyzed using data observed by CHAMP occultation, and it is very obvious. These results may be significant for explaining occulted processing, signal block and the height variation when the occulted signals' tangent height enters the atmospheric boundary layer. |
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| Keywords: | GPS |
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