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500m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。
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.
出处
《北京大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第1期129-134,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
高等学校博士学科点专项科研基金(20040001008)资助项目
关键词
立体观测
云顶高度
图像匹配
stereoscopic observation
cloud-top height
image matching
