| A PARAMETRIC METHOD OF SITE ERROR ESTIMATION FOR A LIGHTNING LOCATION SYSTEM |
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| 作者姓名： | Chen Mingli Liu Xingsheng Guo Changming Ge Zhengmo |
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| 作者单位： | Chen Mingli;Liu Xingsheng;Guo Changming;Ge Zhengmo，Lanzhou Institute of Plateau Atmospheric Physics，Academia Sinica，Lanzhou |
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| 摘 要： | In this paper,a parametric method of site error estimation is developed for a lightning location system (LLS)which consists of three or more direction finders (DFs) and one position analyzer (PA). The site error for eachDF is a function of bearings measured by the DF, and is assumed to be limited-term harmonics. The problemof site error estimation is reduced to a non-linear unconstrained minimization problem by employing the eigentechnique (Orville Jr., 1987). The site error can be found directly by minimizing the objective function. By using the data set obtained with the LLS of three DFs in Beijing area during the summer of 1988, thesite error correction curves for all DFs were found. About 4900 lightning flashes detected by the three DFswere used. The results showed that about 95% of the flash residuals of the sample were within ± 1 degree aftercorrections. The lightning locations with site error corrections were more consistent with the corresponding radarechoes than those without corrections.
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| 收稿时间： | 1989/9/29 0:00:00 |
A PARAMETRIC METHOD OF SITE ERROR ESTIMATION FOR A LIGHTNING LOCATION SYSTEM |
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| Chen Mingli,Liu Xingsheng,Guo Changming,Ge Zhengmo.A PARAMETRIC METHOD OF SITE ERROR ESTIMATION FOR A LIGHTNING LOCATION SYSTEM[J].Acta Meteorologica Sinica,1991,5(3):370-380. |
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| Authors: | Chen Mingli Liu Xingsheng Guo Changming and Ge Zhengmo |
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| Institution: | Lanzhou Institute of Plateau Atmospheric Physics, Academia Sinica, Lanzhou;Lanzhou Institute of Plateau Atmospheric Physics, Academia Sinica, Lanzhou;Lanzhou Institute of Plateau Atmospheric Physics, Academia Sinica, Lanzhou;Lanzhou Institute of Plateau Atmospheric Physics, Academia Sinica, Lanzhou |
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| Abstract: | In this paper,a parametric method of site error estimation is developed for a lightning location system (LLS) which consists of three or more direction finders (DFs) and one position analyzer (PA).The site error for each DF is a function of bearings measured by the DF,and is assumed to be limited-term harmonics.The problem of site error estimation is reduced to a non-linear unconstrained minimization problem by employing the eigen technique (Orville Jr.,1987).The site error can be found directly by minimizing the objective function.By using the data set obtained with the LLS of three DFs in Beijing area during the summer of 1988,the site error correction curves for all DFs were found.About 4900 lightning flashes detected by the three DFs were used.The results showed that about 95% of the flash residuals of the sample were within ±1 degree after corrections.The lightning locations with site error corrections were more consistent with the corresponding radar echoes than those without corrections. |
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| Keywords: | lightning location system random error site error |
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