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2010 IEEE International Geoscience and Remote Sensing Symposium最新文献

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Minimum volume simplicial enclosure for spectral unmixing of remotely sensed hyperspectral data 用于遥感高光谱数据光谱分解的最小体积简易外壳
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5649694
E. Hendrix, I. García, J. Plaza, A. Plaza
Spectral unmixing is an important task for remotely sensed hyperspectral data exploitation. Linear spectral unmixing relies on two main steps: 1) identification of pure spectral constituents (endmembers), and 2) endmember abundance estimation in mixed pixels. One of the main problems concerning the identification of spectral endmembers is the lack of pure spectral signatures in real hyperspectral data due to spatial resolution and mixture phenomena happening at different scales. In this paper, we present a new method for endmember estimation which does not assume the presence of pure pixels in the input data. The method minimizes the volume of an enclosing simplex in the reduced space while estimating the fractional abundance of vertices in simultaneous fashion, as opposed to other volume-based approaches such as N-FINDR which inflate the simplex of maximumvolume that can be formed using available image pixels. Our experimental results and comparisons to other endmember extraction algorithms indicate promising performance of the method in the task of extracting endmembers from real hyperspectral data. In our experiments, we use laboratory-simulated forest scenes with known endmembers and fractional abundances due to their acquisition in a controlled environment using a real hyperspectral imaging instrument.
光谱解混是遥感高光谱数据开发的重要任务。线性光谱分解主要依靠两个步骤:1)纯光谱成分(端元)的识别,2)混合像元中端元丰度的估计。由于空间分辨率和不同尺度的混合现象,实际高光谱数据缺乏纯粹的光谱特征是光谱端元识别的主要问题之一。本文提出了一种新的端元估计方法,该方法不假设输入数据中存在纯像素。该方法在减少的空间中最小化封闭单纯形的体积,同时以同时的方式估计顶点的分数丰度,与其他基于体积的方法(如N-FINDR)相反,N-FINDR会膨胀使用可用图像像素形成的最大体积的单纯形。我们的实验结果和与其他端元提取算法的比较表明,该方法在从实际高光谱数据中提取端元的任务中具有良好的性能。在我们的实验中,我们使用实验室模拟的森林场景,这些场景具有已知的端元和分数丰度,因为它们是在使用真实的高光谱成像仪的受控环境中获取的。
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引用次数: 4
Spatial mapping of actual evapotranspiration and water deficit with MODIS products in the Songnen Plain, northeast China 基于MODIS产品的松嫩平原实际蒸散发和水分亏缺空间制图
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5651301
Lihong Zeng, K. Song, Bai Zhang, Zongming Wang
Analysis of spatial patterns of evapotranspiration (ET) and water deficit (WD) is significant in the evaluation of crop growth status and water use efficiency for the Songnen Plain, an important commodity grain product base of China. Spatial patterns of ET and WD in the Songnen Plain of 2008 growing season (from May to September) were mapped by using MODIS products and meteorological data. The results indicated that ET and WD exhibited obvious spatial variation and gradually increased from southwest to east and northeast. Total ET over the Songnen Plain during the 2008 growing season ranged from 182.7mm to 1002.4mm with the mean value of 591.1mm, and WD ranged from −163.0mm to 645.9mm with the mean value of 195.9mm. Average ET and WD for different land covers varied significantly, water-body and wetlands obtained the highest ET and WD values, while grassland got the lowest ET and WD values. Through this study, it would provide some supports for the assessment of crop growth in arid environments of Songnen Plain.
作为中国重要的商品粮基地,分析松嫩平原作物蒸散发(ET)和水分亏缺(WD)的空间格局对评价作物生长状况和水分利用效率具有重要意义。利用MODIS产品和气象资料,绘制了松嫩平原2008年生长季(5 - 9月)ET和WD的空间格局。结果表明:ET和WD表现出明显的空间差异,由西南向东、东北逐渐增大;松嫩平原2008年生长季总ET在182.7 ~ 1002.4mm之间,平均值为591.1mm; WD在- 163.0 ~ 645.9mm之间,平均值为195.9mm。不同土地覆被的平均ET和WD差异显著,水体和湿地的ET和WD最高,草地的ET和WD最低。通过本研究,可为松嫩平原干旱环境下的作物生长评价提供一定的支持。
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引用次数: 2
Bistatic scattering, backscattering and emissivities of randomly rough soil surfaces at L band based on numerical solutions of Maxwell equations of 3 Dimensional simulations 基于三维模拟Maxwell方程数值解的随机粗糙土壤表面L波段双基地散射、后向散射和发射率
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5651152
Shaowu Huang, L. Tsang
In this paper, we used NMM3D (Numerical Maxwell Model of 3 Dimensional simulations) to study the full wave 3 dimensional scattering of random soil surfaces. In 3D simulations, the height function z=f(x,y) of the rough surfaces vary in both two horizontal directions. Several hundreds of cases are simulated by varying incident angles, surface roughness and soil permittivities. The incident angles vary from 20° to 50°. The coherent/incoherent bistatic coefficients, backscattering coefficients, and emissivities are computed. The results are compared with empirical models and analytical methods. The backscattering coefficients are compared with measurement data and are found to be in good agreement. Based on the several hundreds of computed case, interpolation tables are made for the full range of parameters that can be directly applied to L band active and passive microwave remote sensing of soil moisture, such as the SMAP Mission and the SMOS Mission.
本文采用NMM3D (Numerical Maxwell Model of three Dimensional simulations)对随机土壤表面的全波三维散射进行了研究。在三维模拟中,粗糙表面的高度函数z=f(x,y)在两个水平方向上都是变化的。通过不同的入射角、表面粗糙度和土壤介电常数,模拟了数百种情况。入射角从20°到50°不等。计算了相干/非相干双基地系数、后向散射系数和发射率。结果与实证模型和分析方法进行了比较。将后向散射系数与实测数据进行了比较,发现两者吻合较好。基于数百个计算实例,编制了可直接应用于SMAP任务和SMOS任务等L波段主动和被动微波土壤湿度遥感的全范围参数插值表。
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引用次数: 2
Fully polarimetric ALOS PALSAR data applications for snow and ice studies 全偏振ALOS PALSAR数据应用于冰雪研究
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5649401
G. Venkataraman, Gulab Singh, Y. Yamaguchi
In this study, the capability assessment of fully polarimetric L-band ALOS PALSAR data has been carried out for snow discrimination from other targets. Eigenvaluve based polarization fraction value has been determined for assessing the capability of PALSAR data for snow discrimination. Radar snow index has been developed using polarization fraction and normalized third eigenvalue of coherency matrix. It has been found that radar snow index is more robust and simple to implement that supervised classification.
本研究对全极化l波段ALOS PALSAR数据进行了与其他目标的积雪识别能力评估。本文确定了基于特征值的偏振分数值,用于评估PALSAR数据的积雪识别能力。利用相干矩阵的极化分数和归一化第三特征值建立了雷达积雪指数。研究发现,雷达雪指数比监督分类具有更强的鲁棒性和更简单的实现。
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引用次数: 4
Performance verification and calibration of Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) 超导亚毫米波肢体发射测深仪(SMILES)性能验证与标定
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5654162
S. Ochiai, Y. Irimajiri, K. Kikuchi, T. Nishibori, T. Sano, R. Sato, T. Manabe, H. Ozeki, M. Shiotani
Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) has been operated on orbit since late September 2009. The on-orbit performance of the SMILES submillimeter receiver satisfied the specifications and demonstrated a high capability of superconducting technology for atmospheric science by providing an invaluable low-noise atmospheric limb-emission spectral data in 640-GHz band. The accuracy of the limb spectral data are going to be improved by radiometric calibration based on the instrumental knowledge measured on the ground and measurements on orbit. The observation by SMILES was unfortunately halted because of a failure of the submillimeter-wave local oscillator on 21 April 2010.
超导亚毫米波肢体发射测深仪(SMILES)自2009年9月下旬开始在轨运行。smile亚毫米接收机的在轨性能满足规格要求,为大气科学提供了宝贵的低噪声大气翼发射光谱数据,展示了超导技术的高能力。基于地面测量和在轨测量的仪器知识,采用辐射定标技术,提高了翼谱数据的精度。由于亚毫米波本振在2010年4月21日发生故障,smile的观测不幸中断。
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引用次数: 3
Reuse of software assets for the NASA Earth science decadal survey missions NASA地球科学十年调查任务的软件资产重用
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5653018
C. Mattmann, R. Downs, J. Marshall, Neal F. Most, S. Samadi
Software assets from existing Earth science missions can be reused for the new decadal survey missions that are being planned by NASA in response to the 2007 Earth Science National Research Council (NRC) Study. The new missions will require the development of software to curate, process, and disseminate the data to science users of interest and to the broader NASA mission community. In this paper, we discuss new tools and a blossoming community that are being developed by the Earth Science Data System (ESDS) Software Reuse Working Group (SRWG) to improve capabilities for reusing NASA software assets.
根据2007年地球科学国家研究委员会(NRC)的研究,现有地球科学任务的软件资产可以重新用于NASA正在计划的新的十年调查任务。新的任务将需要开发软件来管理、处理和传播数据给感兴趣的科学用户和更广泛的NASA任务社区。在本文中,我们讨论了地球科学数据系统(ESDS)软件重用工作组(SRWG)正在开发的新工具和蓬勃发展的社区,以提高NASA软件资产的重用能力。
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引用次数: 8
Log-polar and polar image for recognition targets 对数极坐标和极坐标图像用于识别目标
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5652527
A. Toumi, A. Khenchaf
We describe in this paper, data processing algorithms applied on radar image in order to extract feature descriptors and then to perform recognition task. Several kinds of descriptors can be used to acquire information about target characteristics from radar images such as ISAR (Inverse Synthetic Aperture Radar) images. This paper presents two types of vector descriptors extracted via two minds of transformed images so-called polar and log-polar images obtained respectively from the polar and log-polar mapping. In order to guarantee the invariance of some geometrical transformation, additional processing are proposed. In this paper, we present the polar and log-polar transformations and then the classification scheme adapted on correspondent polar and log-polar templates. In the classification step, log-polar and polar mapping results are compared using adapted classification scheme.
本文介绍了应用于雷达图像的数据处理算法,以提取特征描述符并进行识别。从ISAR(逆合成孔径雷达)等雷达图像中获取目标特征信息,可以使用几种描述符。本文提出了两种矢量描述子,分别由极坐标映射和对数极坐标映射得到两种变换后的图像,即极坐标和对数极坐标图像。为了保证某些几何变换的不变性,提出了附加处理方法。本文首先给出了极坐标和对数极坐标变换,然后给出了相应极坐标和对数极坐标模板上的分类方案。在分类步骤中,使用适应的分类方案对对数极坐标和极坐标映射结果进行比较。
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引用次数: 6
Comparison of global land cover products: community remote sensing to validate areas of high disagreement 全球土地覆盖产品的比较:社区遥感以验证高度不一致的地区
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5652081
S. Fritz, I. Mccallum, L. See, F. Kraxner, M. Obersteiner
Maps of global land cover derived from satellite-based earth observation have existed for almost two decades and represent one of the most important sources of baseline terrestrial information for a wide variety of users, e.g. the Convention on Biological Diversity. More importantly, land cover maps provide critical input data for global models of land use and land use changes [1]. Urgent questions have arisen that depend upon an accurate global land cover dataset, e.g. how much land is available for agricultural use or how high will competition for land be between food and bioenergy, considering increasing needs in the future. Some of these questions could be answered if a global baseline map of land cover would exist. However, at present, a unified and satisfactory solution has not surfaced, owing in part to large disagreements among existing global land cover datasets.
基于卫星的地球观测绘制的全球土地覆盖地图已经存在了近二十年,是各种用户(例如《生物多样性公约》)获取基线陆地信息的最重要来源之一。更重要的是,土地覆被图为全球土地利用和土地利用变化模型提供了关键的输入数据[1]。基于准确的全球土地覆盖数据集,出现了一些紧迫的问题,例如,考虑到未来不断增长的需求,有多少土地可用于农业用途,或者粮食和生物能源之间对土地的竞争将有多激烈。如果有一张全球土地覆盖基线地图,其中一些问题就可以得到解答。然而,目前还没有一个统一和令人满意的解决方案,部分原因是现有全球土地覆盖数据集之间存在很大分歧。
{"title":"Comparison of global land cover products: community remote sensing to validate areas of high disagreement","authors":"S. Fritz, I. Mccallum, L. See, F. Kraxner, M. Obersteiner","doi":"10.1109/IGARSS.2010.5652081","DOIUrl":"https://doi.org/10.1109/IGARSS.2010.5652081","url":null,"abstract":"Maps of global land cover derived from satellite-based earth observation have existed for almost two decades and represent one of the most important sources of baseline terrestrial information for a wide variety of users, e.g. the Convention on Biological Diversity. More importantly, land cover maps provide critical input data for global models of land use and land use changes [1]. Urgent questions have arisen that depend upon an accurate global land cover dataset, e.g. how much land is available for agricultural use or how high will competition for land be between food and bioenergy, considering increasing needs in the future. Some of these questions could be answered if a global baseline map of land cover would exist. However, at present, a unified and satisfactory solution has not surfaced, owing in part to large disagreements among existing global land cover datasets.","PeriodicalId":406785,"journal":{"name":"2010 IEEE International Geoscience and Remote Sensing Symposium","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126799398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
C- and Ku-band (at 5.6GHz and 13.6GHz), dual-frequency, multi-polarization, short pulse, combined scatterometer-radiometer system for low altitude platform, vessel and aircraft applications C波段和ku波段(5.6GHz和13.6GHz),双频,多极化,短脉冲,低空平台,船舶和飞机应用的散射辐射计组合系统
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5651415
A. Arakelyan, A. Hambaryan, V. Karyan, G. Hovhannisyan, M. Grigoryan, A. Arakelyan, M. Simonyan, T. Poghosyan, N. Poghosyan
In this paper C-, and Ku-band, dual frequency, multi-polarization, combined, short-pulse scatterometer-radiometer system is described, for short (from low altitude platform), middle (from vessel) and long (from aircraft) distance remote sensing applications for water surface, soil and land snow cover's microwave reflective and emissive characteristics simultaneous and spatially coincident measurements.
本文介绍了C波段、ku波段、双频、多极化、组合、短脉冲散射仪-辐射计系统,在近(低空平台)、中(船舶)和长(飞机)距离遥感应用中,对水面、土壤和陆地积雪的微波反射和发射特性进行同步和空间同步测量。
{"title":"C- and Ku-band (at 5.6GHz and 13.6GHz), dual-frequency, multi-polarization, short pulse, combined scatterometer-radiometer system for low altitude platform, vessel and aircraft applications","authors":"A. Arakelyan, A. Hambaryan, V. Karyan, G. Hovhannisyan, M. Grigoryan, A. Arakelyan, M. Simonyan, T. Poghosyan, N. Poghosyan","doi":"10.1109/IGARSS.2010.5651415","DOIUrl":"https://doi.org/10.1109/IGARSS.2010.5651415","url":null,"abstract":"In this paper C-, and Ku-band, dual frequency, multi-polarization, combined, short-pulse scatterometer-radiometer system is described, for short (from low altitude platform), middle (from vessel) and long (from aircraft) distance remote sensing applications for water surface, soil and land snow cover's microwave reflective and emissive characteristics simultaneous and spatially coincident measurements.","PeriodicalId":406785,"journal":{"name":"2010 IEEE International Geoscience and Remote Sensing Symposium","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129194204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bistatic SAR tomography: Processing and experimental results 双基地SAR层析成像:处理和实验结果
Pub Date : 2010-07-25 DOI: 10.1109/IGARSS.2010.5649760
S. Duque, P. López-Dekker, J. C. Merlano, J. Mallorquí
This paper presents across-track tomography applied to a bistatic geometry with fixed receivers. This kind of geometry can overcome some of the classical monostatic tomography limitations such as temporal decorrelation and irregular baseline distribution. The Remote Sensing Laboratory (RSLab) of the Universitat Politècnica de Catalunya (UPC) has implemented a SAR Bistatic Receiver for INterferometric Applications, SABRINA, with 4-channels. SABRINA has been used to carry out a bistatic tomographic experiment. The acquired data has been processed with different tomographic methods and their performances compared.
本文介绍了应用于固定接收机的双基地几何结构的跨航迹层析成像。这种几何结构可以克服一些经典的单静态层析成像的局限性,如时间去相关和不规则的基线分布。加泰罗尼亚政治大学(UPC)的遥感实验室(RSLab)已经实现了用于干涉测量应用的SAR双基地接收机SABRINA,具有4通道。利用SABRINA进行了双基地层析实验。用不同的层析成像方法对采集到的数据进行了处理,并对其性能进行了比较。
{"title":"Bistatic SAR tomography: Processing and experimental results","authors":"S. Duque, P. López-Dekker, J. C. Merlano, J. Mallorquí","doi":"10.1109/IGARSS.2010.5649760","DOIUrl":"https://doi.org/10.1109/IGARSS.2010.5649760","url":null,"abstract":"This paper presents across-track tomography applied to a bistatic geometry with fixed receivers. This kind of geometry can overcome some of the classical monostatic tomography limitations such as temporal decorrelation and irregular baseline distribution. The Remote Sensing Laboratory (RSLab) of the Universitat Politècnica de Catalunya (UPC) has implemented a SAR Bistatic Receiver for INterferometric Applications, SABRINA, with 4-channels. SABRINA has been used to carry out a bistatic tomographic experiment. The acquired data has been processed with different tomographic methods and their performances compared.","PeriodicalId":406785,"journal":{"name":"2010 IEEE International Geoscience and Remote Sensing Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129207362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
期刊
2010 IEEE International Geoscience and Remote Sensing Symposium
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