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光谱解混是一种重要岩矿光谱定量反演方法.但该方法的影响因素较多,机理复杂,严重影响了岩矿定量反演精度,其中岩石表面的粗糙度和光谱观测角度是重要的影响因素.为揭示粗糙度和观测角度对岩石热红外光谱及光谱解混的影响特征,论文在国家自然基金面上项目"粗糙度和观测角度对岩石热红外光谱解混影响规律的实验研究"的资助下开展研究.主要内容和研究结果如下:(1)自然块状岩石表面形态研究. 相似文献
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《国土资源遥感》2017,(1)
Hapke岩矿二向反射率光谱定量模型是研究混合矿物光谱的有利工具,而国内对该模型的基础研究较少。通过4组室内混合矿物光谱数据来研究该模型在模拟混合矿物光谱时的准确性与存在的问题,进而探讨混合矿物光谱的特征规律。研究表明,在模拟混合矿物光谱方面不论是各向同性,还是各向异性的Hapke模型均有很高的精度,权重调整后4组各向同性模型的模拟结果均方根误差(RMSE)均值为0.014 4,相关系数(R)均值为0.994 7,4组各向异性模型的模拟结果 RMSE均值为0.008 4,R均值为0.994 4,说明该模型是优异的混合光谱分析手段;但模型对暗色矿物适用性较差,如当混合矿物中含有黑云母时模拟精度较低;混合矿物的光谱谱形需要针对矿物组成进行具体分析,其中所占质量分数较高的矿物并不一定能主导混合矿物的光谱谱形,而低反射率的矿物在混合矿物光谱中发挥的作用远大于其质量分数的比重。 相似文献
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利用ASTER热红外遥感数据开展岩石化学成分填图的初步研究 总被引：14，自引：0，他引：14
ASTER遥感成像仪的发射提供了廉价的多光谱热红外数据,是热红外遥感数据的一个重要来源。ASU热红外光谱库提供了多种矿物的热红外发射率波谱的同时,还提供了矿物的化学成分即氧化物含量的分析结果。把ASU波谱库的矿物波谱重采样至ASTER各热红外波段,对矿物的波谱进行波段比值处理,与各矿物成分进行相关分析,选择波段比值与各氧化物含量最大相关系数,进行对数模拟,从而可以确定出发射率光谱与化学成分的数值关系。本文分别对SiO2,MgO,Al2O3,CaO,K2O,Na2O进行了数值分析及公式模拟。统计是根据各矿物做出的,模拟公式同样适用于岩石,进而可以在遥感热红外数据中得以应用。在四川省西范坪矿区利用模拟公式对SiO2,Na2O,K2O三种氧化物进行了岩石填图,在野外大部分得到了证实;利用SiO2进行了硅化蚀变带填图,在异常带内发现了砂岩型铜矿化。 相似文献
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遥感光谱研究是遥感地质的基础研究工作之一,主要用于地质领域中岩石、矿物、地质构造、地质演变过程[1]的研究以及找矿勘查(确定蚀变矿化带)。结合研究课题,本文主要介绍了相山铀矿田地面光谱测量数据的处理与分析方法,从定性和定量两个方面确定蚀变矿物的特征光谱,建立相应的识别光谱模型,为利用高光谱成像技术圈定热液矿化蚀变带,分析蚀变矿物组合,圈定找矿靶区打下基础。 相似文献
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以福建平和钟腾铜钼矿区为例,简要介绍了Hyperion高光谱数据处理技术,探讨了基于特征谱带的光谱微分及基于完全波形特征的光谱匹配等遥感矿物识别方法,初步识别出该矿区的绢英岩,并为地质资料、野外踏勘以及岩矿鉴定所证实.旨在交流基于高光谱遥感数据的岩矿信息提取方法技术,对高植被覆盖区的遥感技术应用进行探索. 相似文献
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Md Soyeb Alam Dheeraj Kumar R. S. Chatterjee Vijay Upreti 《Journal of the Indian Society of Remote Sensing》2018,46(10):1569-1580
Differential interferometric synthetic aperture radar (DInSAR) is a novel remote sensing technique to measure earth surface deformation. It is capable of obtaining dense information related to the deformation of a large area efficiently, economically and effectively. Therefore, DInSAR is a promising technology for monitoring the earth surface deformation related to some natural hazardous events, such as earthquake, volcano eruption, land subsidence, landslide. In present study, Conventional DInSAR technique have been applied to a mineral rich zone, coming under the Khetri copper belt, a part of Northern Aravali range of hillocks in India, predominant with mining activities since late 1960’s to address the possibility of deformation phenomena due to hard rock underground metal mining. Four interferometric SAR data sets of Radarsat-2 was used for the study area to address the subsidence/uplift phenomena. Further, results obtained from conventional DInSAR technique using Radarsat-2 data sets compared with results obtained from ground based observation technique for its validity. In both the techniques, deformation results obtained in terms of average subsidence rate in mm (quarterly basis) of points under study within mining zone of Mine-A has well agreed to each other. Further, it has been observed that average subsidence rate in mm (quarterly basis) obtained from space based observation and ground based observation are 5.6 and 6.67, respectively over the points under study in mining zone of Mine-A. 相似文献
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The geologic features indicative of Cu, Pb, Zn mineral deposits in a area are fractures (structure), and host rock sediments. Datasets used include Cu, Pb, Zn deposit points record, geological data, remote sensing imagery (Landsat TM5). The mineral potential of the study area is assessed by means of GIS based geodata integration techniques for generating predictive maps. GIS predictive model for Cu, Pb, Zn potential was carried out in this study area (Weixi) using weight of evidence. 相似文献
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半参数测量平差模型参数的二阶段估计 总被引：4，自引：2，他引：2
本文首先利用自然样条函数法,找到符合条件的非参数自然插值样条函数。其次利用核函数并综合最小二乘法建立了参数x和S非参数的估计量x、S,讨论了窗宽参数h的选取方法。最后,用一个模拟的平差算例从估值的稳定性、均方差等方面与最小二乘法进行了比较,结果说明,半参数测量模型能更接近于真实情况。 相似文献
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基于集合卡尔曼滤波和通用陆面模型(CLM 1.0)发展了一个地表温度的同化系统。这个系统同化了MODIS温度产品, 并将MODIS的叶面积指数引入CLM模型中, 主要用于改进地表水热通量的估算精度。将CLM输出的地表温度与MODIS地表温度建立关系, 并作为同化系统的观测算子。将MODIS地表温度与实测地表温度进行了比较, 将其均方差(Root Mean Square Error, RMSE)作为观测误差。选取3个美国通量网站点(Blackhill、Bondville、Brookings)作为实验数据, 结果表明: 同化结果中地表温度、显热通量的估算精度均有提高。其中Blackhill站的估算精度改进最大, 均方差由81.5W·m-2减小到58.4W·m-2, Bondville站均方差由47.0W·m-2减小到31.8W·m-2, Brookings站均方差由46.5W·m-2减小到45.1W·m-2。潜热通量估算精度在Bondville站均方差由88.6W·m-2减小到57.7W·m-2, Blackhill站均方差由53.4W·m-2减小到47.2W·m-2。总之, 结合陆面过程模型同化MODIS温度产品估算地表水热通量是可行的。 相似文献
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Tarik. B. Benomar BIAN Fuling 《地球空间信息科学学报》2006,9(2):151-156
IntroductionChina is the third richest country in the world ofmineral resources with a total potential value of 11trillion USdollars. Yunnan Provincce is one of theimportant metallogenic belts for nonferrous and pre-cious metal deposits[1].Mineral source … 相似文献
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Huadong Guo 《International Journal of Digital Earth》2018,11(6):546-557
Although Earth’s surface parameters obtained from satellite data have become more and more precise, it is still difficult to guarantee temporal consistency and spatial continuity for large-scale geoscience phenomena. Developing new Earth observation platforms is a feasible way to improve the consistency and continuity of such data. As the planet’s only natural satellite, the Moon has special advantages as a platform for observing Earth, including long lifetime, whole disk view, tectonic stability and unique perspective. After presenting the observation geometry constructed by using the ephemeris, this paper mainly discusses the characteristics of a lunar platform and the proper Moon-based sensors, as well as the scientific objectives of Moon-based Earth observation. Solid Earth dynamics, the energy budget of Earth, Earth’s environmental elements and the Earth-space environment are four potential applications analysed in this paper. 相似文献
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不同于双频数据的应用,多频数据的采用对单点定位有着特殊意义,可以更好地获得其模糊度的解。基于卫星导航定位系统多频载波相位线性组合理论,研究了具有特殊意义的组合观测值及其特性。在此基础上,通过多频观测值数据的数值仿真,采用新方法进行整周模糊度快速求解。编制了基于多频载波相位组合单点定位软件,通过结果的比较分析,得出有一定实际应用意义的结论。此方法算法简单,速度快,能够满足实时导航定位的需要,具有工程应用价值。 相似文献