基于Hapke模型多角度孔雀石光谱特性分析  

Spectral Characteristics of Multi-angle Malachite on Hapke Model

作　　者：程寅益 周可法[1,2,3] 王金林 王珊珊[1,3] 崔世超 Cheng Yinyi;Zhou Kefa;Wang Jinlin;Wang Shanshan;Cui Shichao(Xinjiang Research Center for Mineral Resources,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;Xinjiang Laboratory of Mineral Resources and Digital Geology,Urumqi 830011,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院新疆生态与地理研究所新疆矿产资源研究中心,乌鲁木齐830011 [2]中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐830011 [3]新疆矿产资源与数字地质重点实验室,乌鲁木齐830011 [4]中国科学院大学,北京100049

出　　处：《地质科技情报》2019年第4期293-298,共6页Geological Science and Technology Information

基　　金：新疆维吾尔自治区重点实验室开放课题(2016D03006);国家自然科学基金联合基金项目-重点支持项目(U1503291);国家自然科学基金青年基金项目(41402296);国家自然科学基金-新疆联合基金重点项目(U1803241)

摘　　要：岩矿的光谱特征是利用遥感手段识别岩矿的理论基础,随着遥感技术的不断发展,多角度观测为岩矿的遥感精确识别提供了新的思路。选取孔雀石粉末的多角度光谱特征作为研究对象,利用Hapke模型对孔雀石的多角度光谱特征进行精确描述,以确定孔雀石的单次散射反照率的多角度光谱特征。研究表明,光源天顶角和传感器观测天顶角之间的关系对于孔雀石的单次散射反照率有着重要影响,样本的单次散射反照率标准差与其光谱之间整体体现负相关关系。根据这一结论,比较样品单位波长内各角度二向反射率和单次散射反照率标准差,二向反射率受到影响作用较小,故可以利用多角度条件下单次散射反照率波谱特征提高对孔雀石的遥感识别精度。Hyperspectral remote sensing technology has contributed to the quantitative inversion of mineral content in the visible-near infrared(350-500 nm)band.This paper explores an improved remote sensing mineral identification involved in using this model to convert bidirectional reflectance into the average single-scattering albedo of rocks and minerals,and establishes the average single-scattering albedo spectral function of rocks and minerals.The results show that the relationship between the incident and observed zenith angles significantly influences the average single-scattering albedo of rocks and minerals.The standard single-scattering albedo parameter at each wavelength introduced in the paper can help indicate the presence of more obvious directional characteristics of rock and mineral average single-scattering albedo.The study has revealed a negative correlation between the standard deviation of the average single-scattering albedo and its spectrum.The comparision of the standard deviations of the bidirectional reflectance and the single-scattering albedo for each angle in the sample’s unit wavelength demonstrates that the difference in the incident light′s angle barely influences the bidirectional reflectance.Traditional rock identification based on bidirectional reflectivity cannot decompose complex nonlinear rock spectrum data.Based on the model,the average single-scattering albedo can decompose the nonlinear spectrum and approach linear mixing,greatly improving remote sensing rock and mineral identification accuracy.

关 键 词：Hapke模型 平均单次散射反照率 多角度 光谱特性 

分 类 号：P627[天文地球—地质矿产勘探]