北京大学学报（自然科学版）

双星立体观测云顶高度几何反演方法

黄磊1吕胜辉2张焱1王洪庆1   

  1. 1 北京大学物理学院大气科学系，北京100871；2 中国民用航空总局天津空中交通管理站气象台，天津300300；
  • 收稿日期:2007-04-17 出版日期:2008-01-20 发布日期:2008-01-20

Geometric Method for Determining Cloud-Top Heightfrom Stereoscopic Observation

HUANG Lei1 , L Shenghui2 , ZHANG Yan1 , WANG Hongqing1    

  1. 1 Department of Atmospheric Science, School of Physics, Peking University, Beijing 100871; 2 Civil Aviation Tianjin Air Traffic Management Meteorological Observatory, Tianjin 300300；
  • Received:2007-04-17 Online:2008-01-20 Published:2008-01-20

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摘要： 通过双星立体观测中卫星-球心-投影云-真云的平面和球面三角几何关系推导出真云云顶高度计算公式，利用云顶高度变化和图像匹配的方法，对模拟得到的双星“立体观测图像对"进行云顶高度反演实验。通过对具有台风和冷锋形态分布的卫星红外云图模拟资料进行实验，得出平均垂直高度误差不超过500 m的云顶高度，并对图像对比中1个像素偏移导致的云顶高度误差进行了误差分析。

关键词: 立体观测, 云顶高度, 图像匹配

Abstract: A new and accurate method based on cloud movements, spherical and plane triangular relationships of satellites, earth's core, projected-cloud and true-cloud for determining cloud-top height is developed. Synthetic stereo images from a single satellite are used to test this method. It is demonstrated that the cloud-top height can be determined from stereoscopic measurements of geo-synchronous satellites with vertical accuracy of approximately 500 m. Error analysis of 1-pixel incorrect match was presented.

Key words: stereoscopic observation, cloud-top height, image matching

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