| 双站数字摄像测量云高 |
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| 引用本文： | 谭涌波,陶善昌,吕伟涛,刘亦风.双站数字摄像测量云高[J].应用气象学报,2005,16(5):629-637. |
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| 作者姓名： | 谭涌波 陶善昌 吕伟涛 刘亦风 |
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| 作者单位： | 1.中国科学技术大学地球和空间科学学院, 合肥230026 |
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| 基金项目： | 国家自然科学基金项目(49975005)资助 |
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| 摘 要： | 文章提出一种新的地基、双站数字摄像测量云高的方法, 采用两台数字摄像仪同时拍摄实时云图, 自动搜索两幅图像中相互匹配的特征区域, 通过计算特征区域之间的位移量来求取云高。将双站数字摄像云高测量系统与合肥骆岗机场激光测云仪进行对比, 结果较一致。通过对云高计算公式的误差分析确定了适于该系统进行测量的条件, 如基线长度应尽可能长, 但不宜超过200 m, 有效的云高测量视场角在±45°以内。此外还讨论了该方法的优点和局限性。
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| 关 键 词： | 云高 双站 数字摄像 图像分析 |
| 收稿时间： | 2004-09-06 |
| 修稿时间： | 2005-04-01 |
Observation of Cloud Base Height Through Double Location Digital Photography System |
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| Tan Yongbo.Observation of Cloud Base Height Through Double Location Digital Photography System[J].Quarterly Journal of Applied Meteorology,2005,16(5):629-637. |
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| Authors: | Tan Yongbo |
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| Affiliation: | 1.School of Earth and Space Sciences, University of Science and Technology of China, Hefei2300262.Chinese Academy of Meteorological Sciences, Beijing100081 |
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| Abstract: | It is extremely important and valuable work to develop advanced remote sensing system of microphysical and microphysical cloud characters. A new method is proposed to observe cloud base height through ground-based double location digital photography system. In this system, cloud height is calculated in real time from displacement between two matching templates which are automatically searched from two all-sky nephograms. Consistency is shown between cloud heights observed through double location and those through lidar in Luogang airport of Hefei. According to measurement error of cloud height, the observation should be performed under the preferential observing condition with baseline length as long as possible but less than 200 m, and angle of view variable in ±45o. Furthermore, the excellence and limitation of this method are discussed. |
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| Keywords: | Cloud Height Double location Digital photography Image analysis |
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