Retrieval of conifer leaf area index based on the optical physical model

Compared with the traditional remote sensing, multi-angle obersvation could get the detailed three-dimensional structural information of forest through different directional observations, which provides a new method for quantitative remote sensing. In this paper the look-up table was constructed according with the different kinds of remote sensing model. The mixed pixel model was used as TM/ETM+ data was used, and the appropriate physical model was used according to the different forest sense as CHRIS datawais used. Base on the model the look-up tables were constructed,and the leaf area index was retrieved from the different kinds of data making use of interpolation. Comparing the LAI (Leaf Area Index) with MODIS 15A2 LAI, the result showes that the multi-angle remote sensing can improve the precision of retrieval of conifer LAI, and there is a certain theoretical research and practical application value