| 地基GPS水汽层析的投影面算法 |
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| 引用本文： | 丁楠,张书毕.地基GPS水汽层析的投影面算法[J].测绘学报,2016,45(8):895-903. |
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| 作者姓名： | 丁楠 张书毕 |
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| 作者单位： | 1. 中国矿业大学环境与测绘学院, 江苏 徐州 221008;2. 江苏省资源环境信息工程重点实验室, 江苏 徐州 221008 |
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| 基金项目： | The National Natural Science Foundation of China(41504032)，The National Natural Science Foundation of Jiangsu Province of China(BK20150175)，The Specialized Research Fund for the Doctoral Program of Higher Education of China (No．20130095110022)@@@@国家自然科学基金(41504032)，江苏省自然科学基金(BK20150175)，高等学校博士学科点专项科研基金(20130095110022) |
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| 摘 要： | 水汽层析技术在研究气候变化、极端天气预警、辅助数值天气预报等方面发挥着重要作用。常规的水汽层析技术在计算层析方程系数时,需要进行大量的求交运算。对此,本文提出了一种投影面算法,提高了运算速度和反演的精度。本文采用的试验数据是香港卫星定位参考站网(SatRef)提供的GPS信号数据,与传统算法相比,投影面算法的计算速度更快、计算量更小,不受层析区域大小影响,水汽层析的结果与探空数据具有良好的一致性。
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| 关 键 词： | 水汽层析 信号路径 像素 体素遍历算法 代数重构算法 |
| 收稿时间： | 2016-01-07 |
| 修稿时间： | 2016-05-19 |
Land-based GPS Water Vapor Tomography with Projection Plane Algorithm |
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| DING Nan,ZHANG Shubi.Land-based GPS Water Vapor Tomography with Projection Plane Algorithm[J].Acta Geodaetica et Cartographica Sinica,2016,45(8):895-903. |
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| Authors: | DING Nan ZHANG Shubi |
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| Institution: | 1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China;2. Key Laboratory of Resources and Environmental Information Engineering of Jiangsu Province, China University of Mining and Technology, Xuzhou 221008, China |
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| Abstract: | Water vapor tomography is of crucial theoretical importance to and widely applied in meteorology and climatology,for instance,extreme weather forecasting and now casting,numerical weather prediction and cl imate change study.Conventional water vapor tomography strategy for calculating equation coefficient needs extensive calculation.To solve this problem,projection plane algorithm is developed for improving the speed of calculation and the accuracy of inversion.The GPS signal data used in this article comes from Hong Kong SatRef.The result,which is compared to the traditional algorithm,indicated that new algorithm reduces the computing time greatly and is not affected by size of tomography area and there is consistency in the results of tomographic inversion and radiosonde. |
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| Keywords: | water vapor tomography signal path pixel voxel traversal algorithm algebraic reconstruction technique |
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