| GPS"射线打靶”模式的并行计算 |
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| 作者姓名： | Li Shuyong Wang Bin Zhang Xin |
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| 作者单位： | Li Shuyong，Wang Bin and Zhang Xin LASG，Institute of Atmospheric Physics，Chinese Academy of Science，Beijing 100029 |
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| 基金项目： | This research was supported by the National Natural Science Foundation of China(Orant No.49825109)，the National Key Developme |
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| 摘 要： | 全球定位系统（ＧＰＳ）“射线打靶”模式是ＧＰＳ／ＭＥＴ（气象）资料变分同化中联系ＧＰＳ原始观测与大气状况的一种自成一体的观测算子，但因其计算量非常巨大而一直没能得到实用。为了克服这一困难，我们建立一个并行版本的 ＧＰＳ“射线打靶”模式，并在国家重点基础研究发展规划项目“大规模科学计算研究”资助下研制的微机机群系统（ＬＳＳＣ）上成功地实现了并行计算，取得了理想的加速比和并行效率，而且具有良好的可扩展性，为该观测算子达到实用迈出了实质性的一步。
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| 关 键 词： | GPS射线打靶 并行计算 效率 可扩展性 |
| 收稿时间： | 15 November 2003 |
The Parallel Computing of GPS Ray-shooting Model |
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| Li Shuyong,Wang Bin,Zhang Xin.The Parallel Computing of GPS Ray-shooting Model[J].Advances in Atmospheric Sciences,2001,18(6):1185-1191. |
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| Authors: | Li Shuyong Wang Bin and Zhang Xin |
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| Institution: | LASG, Institute of Atmospheric Physics, Chine,se Academy of Sciences, Beijing 100029,LASG, Institute of Atmospheric Physics, Chine,se Academy of Sciences, Beijing 100029,LASG, Institute of Atmospheric Physics, Chine,se Academy of Sciences, Beijing 100029 |
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| Abstract: | The Global Positioning System (GPS) ray-shooting model is a self-sufficient observation operator in GPS MET (Meteorology) data variational assimilation linking up the GPS observation data and the atmospheric state variables. But its huge computations make it impracticable in real data assimilation so far. In order to overcome this default, a parallel version of the GPS ray shooting model has been developed,and has been running successfully on the PC cluster manufactured under the support of the China National Key Development Planning Project for Basic Research: The Large Scale Scientific Computation Research.High speed-up and Efficiency as well as good scalability are obtained. This is an important step for this GPS observation operator to become practicable. |
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| Keywords: | GPS ray-shooting Parallel computing Efficiency Scalability |
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