| 利用射线追踪法分析三种典型对流层映射函数在中国区域的精度 |
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| 引用本文： | 郭际明,章迪,史俊波,周命端.利用射线追踪法分析三种典型对流层映射函数在中国区域的精度[J].武汉大学学报(信息科学版),2015,40(2):182-187. |
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| 作者姓名： | 郭际明 章迪 史俊波 周命端 |
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| 作者单位： | 1武汉大学测绘学院湖北 武汉 430079; 2精密工程与工业测量国家测绘地理信息局重点实验室湖北 武汉 430079;3广西空间信息与测绘重点实验室(桂林理工大学)广西 桂林 541004;4北京建筑大学测绘与城市空间信息学院北京 100044 |
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| 基金项目： | 国家自然科学基金资助项目(41474004);广西空间信息与测绘重点实验室2011年开放基金资助项目(桂科能1103108-12);武汉大学实验技术资助项目~~ |
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| 摘 要： | 基于中国区域内8个气象站点2012年全年的探空数据,采用射线追踪法计算了各个站天顶方向至4°高度角区间内18个方向的对流层流体静力学和非流体静力学延迟量,将天顶延迟通过NMF、GMF和VMF1三种映射函数投影到各个高度角方向,与射线追踪法得出的延迟量进行比较,结果显示:①NMF有明显的季节性偏差,且精度与纬度存在强相关性;②VMF1的精度最高、稳定性最好,但在武汉、长沙等站点存在一定的季节性偏差;③GMF的精度介于NMF和VMF1之间。
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| 关 键 词： | 对流层延迟 映射函数 NMF GMF VMF1 射线追踪 |
| 收稿时间： | 2013-05-02 |
Using Ray-Tracing to Analyse the Precision of Three Classical Tropospheric Mapping Functions in China |
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| GUO Jiming;ZHANG Di;SHI Junbo;ZHOU Mingduan.Using Ray-Tracing to Analyse the Precision of Three Classical Tropospheric Mapping Functions in China[J].Geomatics and Information Science of Wuhan University,2015,40(2):182-187. |
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| Authors: | GUO Jiming;ZHANG Di;SHI Junbo;ZHOU Mingduan |
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| Institution: | 1School of Geodesy and Geomatics Wuhan University Wuhan 430079 China;2Key Laboratory of Precise Engineering and Industry Surveying National Administration of Surveying Mapping and Geoinlormation Wuhan 430079 China;3Uuangxi Key Laboratory of Spatial Information and Geomatics, Guilin 541004 China;4College of Geomatics and Urban Information Beijing University of Civil Engineering and Architecture Beijing 100044 China |
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| Abstract: | Radiosonde data from 8 stations in China are analyzed based on ray-tracing technology. Hydrostatic and non-hydrostatic delays for 18 directions，from the zenith to 40 elevation，were computed.The results were compared with 3 mapping functions: NMF, UMF and VMFl，which demonstrate that: ①there is strong relation between the precision of NMF and the latitude of the station;②VMFl is the most precise and stable mapping function, but with certain seasonal variations when applied in WuHan，ChangSha and some other stations;③the precision of UMF falls between that of NMF and VMFl. |
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