摘要
确定大气中的云参数对于大气物理及气候研究具有重要意义。这些参数一般难以由测量直接得出,而必须基于相关的可测物理量进行反演后才可得出。通过分析云的天基观测方式,发现云的大气路径长度、云顶气温或气压以及云组成的微观特性可用来进行云高遥感与反演。文献调研表明,实际中使用的方法可以分为成像几何关系和通道辐射特性两大类:前者依赖于成像过程中得到精密控制的光源、目标和遥感器的空间方位信息;后者利用定量化的遥感能够准确地获得地物目标的辐射量值信息,如果再结合多光谱或高光谱手段,便能够得出详细丰富的云团信息。同时分别介绍了八种实用化方法。
The determination of the cloud parameters in atmosphere is of importance to the study of atmospheric physics and climate.These parameters are difficult to be derived directly in actual measurement and should only be derived after some related measurable physical factors are retrieved. Through analysis of space-based cloud observation,it is found that atmosphere path length,cloud-top temperature or pressure and the micro composition of different clouds can be used in the remote sensing and retrieval of cloud-top height.Some references show that the practical methods can be divided into two classes：the method using the geometry of imaging and the one using spectral radiation characteristics. The former relies on the space orientation of the light source,target and sensor controlled precisely during imaging and the latter relies on the quantitative radiation values of ground objects.When combined with the multispectral or hyper-spectral technology,they can derive abundant cloud information.Eight methods are presented.
出处
《红外》
CAS
2010年第11期1-5,共5页
Infrared
基金
中国科学院知识创新工程项目(KGCX1-YW-16)
关键词
云顶高度
遥感
反演
cloud-top height
remote sensing
retrieval
