机构地区: 北京航空航天大学仪器科学与光电工程学院
出 处: 《红外与激光工程》 2006年第z4期517-522,共6页
摘 要: 比辐射率光谱表征着一个物体的内部物理和化学特征,是定量化遥感的一个关键参数。本文利用ASTER 数据的第10至14波段,根据其数据的特点,基于温度比辐射率分离算法的思想,提出了将比辐射率标准化法(Normalize Emissivity Method,NEM)、经验公式、比值法(Ratio Method)这几个模块结合起来,在迭代的基础上计算出比辐射率的新算法。本文简要分析了模型误差的主要来源,并且把本文的算法与简化的 ASTER 的 TES 算法进行了比较。分析表明本文的算法是可行、有效的,而且该算法简单,易于实现,在能够保证精度的情况下运算速度快;同时也说明 ASTER 遥感数据用于反演地物的比辐射率可以得到比较理想的结果,具有良好的应用前景。 Emissivity spectrum indicates the inner physical and chemical feature of an object which is the key parameter of quantitative remote sensing.A new algorithm is developed which is combined with the Normalized Emissivity Method(NEM)module,empirical formula and Ratio Method.It use the data of ASTER's tenth to fourteenth channel and is based on the idea of TES(Temperature Emissivity Separation) algorithm which can calculate the emissivity based upon iteration.The main source of error and compares this algorithm with the official TES algorithm of ASTER are analyzed.Through the analysis,it can be concluded that the algorithm proposed here is available and simple.It can get high speed without losing accuracy.At the same time,it can also be seen that inversion emissivity from ASTER remote sensing data can get good results and it has bright perspective in applications.
领 域: [自动化与计算机技术] [自动化与计算机技术]