| 可降水份的误差分析 |
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| 引用本文： | 刘焱雄,陈永奇,H.B.Iz.可降水份的误差分析[J].武汉大学学报(信息科学版),2000,25(2). |
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| 作者姓名： | 刘焱雄 陈永奇 H.B.Iz |
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| 作者单位： | 1. 武汉测绘科技大学GPS研究中心,武汉市珞喻路129号,430079
2. 香港理工大学土地测量与地理资讯学系,香港九龙红磡 |
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| 基金项目： | 香港理工大学资助项目!编号V366 |
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| 摘 要： | 分析了由无线电探空数据计算可降水份中逼近误差和观测误差的影响 ,利用香港的无线电探空资料计算出逼近误差和观测误差的影响分别为 0 .5mm和 1 .2mm ,两者的综合影响为 1 .3mm。
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| 关 键 词： | 可降水份 无线电探空数据 逼近误差 观测误差 |
The Effect of Approximation Error and Observation Error on Precipitable Water Vapor |
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| LIU Yanxiong,CHEN Yongqi,H.B.Iz.The Effect of Approximation Error and Observation Error on Precipitable Water Vapor[J].Geomatics and Information Science of Wuhan University,2000,25(2). |
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| Authors: | LIU Yanxiong CHEN Yongqi HBIz |
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| Abstract: | The determination of precipitable water vapor (PWV) is one of the basic objectives of GPS meteorology. PWV calculated from radiosonde data is usually used as a reference to assess GPS derived PWV .The radiosonde_based PWV is derived by integrating the water vapor density along a balloon's uprising path which is a function of the observed temperature,relative humidity at different heights.Hence,the meteorological observations errors propagate to the calculated PWV .Moreover,these meteorological observations are discrete,and a numerical integration scheme is employed to calculate the PWV .Therefore,the density of observations also influences the accuracy of the PWV (approximation error).In this study,we analyze these two error sources in the determination of PWV using 50_day Hong Kong radiosonde data.We estimate an approximation error of 0.5 mm and observation error of 1.2 mm in calculating PWV .The total impact of the both error sources is about 1.3mm. |
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| Keywords: | precipitable water vapor (PWV) radiosonde data approximation error observation error |
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