您的位置:首页  > 论文页面

双星立体观测云顶高度几何反演中的误差分析

发表时间:2008-07-15  浏览量:1900  下载量:685
全部作者: 王洪庆,张焱,林隐静,吕胜辉
作者单位: 北京大学物理学院;民航天津空中交通管理站气象台
摘 要: 基于卫星立体观测资料的云顶高度几何反演方法,与目标的物理特征几乎无关,较红外亮温资料的云顶高度反演方法具有更高的可信度。同时,随着立体观测资料的质量和分辨率的提高,几何方法的反演精度可能有进一步的提高。云顶高度几何反演过程中,不同卫星图像的准确匹配是提高反演精度,降低反演误差的重要因素。利用卫星、真云、投影云和球心的平面球面几何关系,在几何反演方法的基础上,分析了在固定云高、不同卫星间隔和固定卫星间隔、不同云高这两种情况下,错误对比1个像素导致的可能的反演误差。
关 键 词: 气象学;立体观测;云顶高度;误差分析
Title: The error analysis of cloud-top height from stereoscopic observation
Author: WANG Hongqing, ZHANG Yan, LIN Yinjing, LV Shenghui
Organization: School of Physics, Peking University;Civil Aviation Tianjin Air Traffic Management Meteorological Observatory
Abstract: The cloud-top height retrieved by stereo measurements only depends on the basic geometric relationships of the observed visible cloud particles, and is independent of the physical presentation of cloud. So, stereo measurements are more reliable than retrieval measurement based on infrared brightness temperature. And the accuracy is possibly increasing, as the quality and resolution of stereoscopic observation are improving. When the cloud-top height is retrieved by stereo measurements, accurate matching of different satellite images is important for improving retrieval accuracy and decreasing error. Based on the spherical and plane triangular relationships of the spacecraft, the center of the earth, the projected-cloud and the true-cloud, several error analyses were done when one pixel was incorrectly matched with different intersection angle of crafts and the same cloud height. The error analysis with the same intersection angle of crafts and different cloud height were also done.
Key words: meteorology; stereoscopic observation; cloud-top height; error analysis
发表期数: 2008年11月第13期
引用格式: 王洪庆,张焱,林隐静,等. 双星立体观测云顶高度几何反演中的误差分析[J]. 中国科技论文在线精品论文,2008,1(13):1429-1435.
 
0 评论数 0
暂无评论
友情链接