面向LAI反演的参数化SAILH模型  

A parameterized SAILH model for LAI retrieval

作　　者：李静[1,2] 阎广建[1,2] 穆西晗[1,2] 

机构地区：[1]遥感科学国家重点实验室北京师范大学 [2]北京师范大学地理学与遥感科学学院,北京100875

出　　处：《遥感学报》2010年第6期1182-1195,共14页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金项目(编号:40871164);国家重点基础研究发展计划(编号:2007CB714402);欧盟FP7计划CEOPAEGIS(编号:212921)~~

摘　　要：建立了一种基于植被冠层辐射传输模型SAILH的参数化模型。该模型首先对SAILH模型中用到的9个中间变量的计算过程进行简化,然后用一个明确的表达式计算光照冠层的单次散射贡献。分别用模拟数据和2008年黑河地区星-机-地同步实验中获取的地面测量数据对该参数化模型的反演精度和效率进行了评价。评价结果表明该参数化模型能在保证反演精度的基础上极大的提高反演效率;利用模拟数据进行的模型稳定性评价表明,参数化模型的稳定性优于SAILH模型。The paper proposes a parameterized model based on the vegetation canopy radiative transfer model SMLH. This model simplifies the calculation of the nine intermediate variables of the SAILH model, and adapts an explicit formula to calculate the contribution of the single scattering in the illuminated canopy. We evaluate the retrieval accuracy and efficiency of the parameterized model with simulated data and ground-based measurements which are taken in the satellite-aircraft-ground synchronous experiment over the Heihe river basin in 2008.The results shows that the retrieval efficiency is improved greatly by the parameterized models but the retrieval accuracy is kept. It is also found that the stability of the parameterized model is better than the SAILH model.

关 键 词：SAILH模型 参数化 LAI反演 

分 类 号：P237[天文地球—摄影测量与遥感]