1. Department of Information Engineering, China University of Geosciences(Wuhan), Wuhan 430074, China 2. Jilin Provincial Communication Planning and Design Institute, Changchun 130021, China
The distribution of the mineral abundances on lunar surface has a significant meaning. Hapke model is one of the most usually used methods for studying lunar surface, and particle size is one of the parameters that must be clearly understood in doing model calculation. Nevertheless, the research on grain size remains very insufficient. To study the distribution of the abundances of five main minerals, i.e., clinopyroxene, orthopyroxene, plagioclase, olivine and ilmenite, the authors considered the influence of grain size and built inverse models of these five minerals by using fully constrained linear-unmixing method with Relab data based on Hapke radioative transfer model, with the correlation coefficients of these five minerals being 0.98, 0.98, 0.83, 0.91 and 0.50. Furthermore, the accuracy of this models was verified by using data of Apollo sampling points . At last, the lunar minerals abundance distribution maps of Sinus Iridum were compiled by applying the models to the M 3 hyperspectral data,which shows that the fully constrained linear-unmixing method in consideration of mineral grain sizes can be used to study lunar mineral abundance distribution.
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