用于月球风化层遥感的光谱分离技术研究

为了解决混合像元问题，发展了一门新的技术——光谱分离技术，线形混合模型是目前应用最成功的方法，但是当应用到月球风化层遥感时，其存在两个内在的缺陷: 一是由于充分混合引起的非线性，二是纯光谱的不“纯”性.对于第一个缺陷，从 Hapke理论出发，充分考虑了数据的特点，大大简化多重散射模型来提高充分混合的线形性，同时降低了原模型计算的复杂度；对于后一个问题，提出用修正线形混合模型来弥补“纯”光谱中的误差.该方法通过Relab数据库中的模拟月壤的光谱数据进行了验证，试验结果表明，这种方法具有很好的性能.

The Application of Spectral Unmixing Technology for Lunar Regolith

Spectral unmixing technology has been developed to solve mixing pixel problem, the linear mixing model is more successful to this day. But when applied to the lunar regolith, it would have two limitations: the nonlinerity of intimate mixture and the error caused by the lack of endmember spectra. As to the former, simpled multiple scattering model based on Hapke's theory is developed to improve the linearity of intimate mixture and reduce computational complexity; as to the latter, Modified Linear Mixing Model (MLMM) is advanced to compensate for the error in endmember spectra. The motheds are test by the simulated lunar soils' spectra data gained from the Relab, the experimental result display their good performances.