雪粒径遥感反演研究进展

Progress in the Research on Snow Grain Size Retrieved from Remote Sensing

介绍了雪粒径遥感反演的研究历史,阐述了球形或非球形假设下基于雪在可见光波段高反射,在红外区雪面反射率显著下降且对雪粒径变化敏感原理的遥感反演基础,其中包括诸如温度、波长、颗粒形状等,并总结了目前研究中所应用的模型和算法,指出其优点和不足之处.此外,为了得到反演粒径的准确性,讨论了诸如温度、波长、颗粒形状等因素对粒径反演的影响以及其验证方法.

In this paper,the significance and history of studying the snow grain size are introduced.Based on the assumption that highly reflectivity in the visible band and the reflectivity of snow surface decreasing significantly in the infrared band,the grain size of snow,spherical and non-spherical,is sensitive to the change in remote sensing retrieval foundation.Finally the models and algorithms applied in current studies are summed up,together with their advantage and shortage.In addition,in order to get the accuracy of the retrieval,some factors that may affect the grain size retrieved are also discussed,such as temperature,wavelength,particle shape,etc.,as well as the authentication method.