2007 IEEE International Geoscience and Remote Sensing Symposium最新文献_第3页

Visualization of hyperplanes for SVM classification SVM分类的超平面可视化

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423230

A. Lucieer

引用次数: 2

Generation of ENVISAT ASAR Mosaics accessible on-line 可在线访问的ENVISAT ASAR马赛克的生成

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423069

C. Caspar, O. Colin, H. Laur, B. Rosich, G. Tandurella, E. Mathot, P. Gonçalves, F. Brito

引用次数: 7

Remote sensing of chlorophyll fluorescence for estimation of stress in vegetation. recommendations for future missions 叶绿素荧光遥感在植被胁迫估算中的应用。对未来任务的建议

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423663

J. Amorós-López, J. Vila-Francés, L. Gómez-Chova, L. Alonso, L. Guanter, Secundino del Valle-Tascun, J. Calpe-Maravilla, J. Moreno

引用次数: 3

Autonomous Objectively Optimized Observing Systems 自主客观优化观测系统

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423062

David John Lary

{"title":"Autonomous Objectively Optimized Observing Systems","authors":"David John Lary","doi":"10.1109/IGARSS.2007.4423062","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423062","url":null,"abstract":"This paper describes one vision for future Earth observing systems. New in this vision is the desire for symbiotic communication to dynamically guide an Earth observation system. An Earth observation system which is not just a single satellite acting on its own but a constellation of satellites, and sub-orbital platforms such as unmanned aerial vehicles, and ground observations interacting with computer systems used for modeling, data analysis and dynamic observation guidance. An autonomous Objectively Optimized Observation Direction System (OOODS) is of great utility for Earth observation. In particular, to have a fleet of smart assets that can be reconfigured based on the changing needs of science and technology. The OOODS integrates a modeling and assimilation system within the sensor web allowing the autonomous scheduling of the chosen assets and the autonomous provision of analyses to users. The OOODS operates on generic principles that could easily be used in configurations other than the specific examples described here. Metrics of what we do not know (state vector uncertainty) are used to define what we need to measure and the required mode, time and location of the observations, i.e. to define in real time the observing system targets. Metrics of how important it is to know this information (information content) are used to assign a priority to each observation. The metrics are passed in real time to the sensor web observation scheduler to implement the observation plan for the next observing cycle. The same system could also be used to reduce the cost and development time in an Observation Sensitivity Simulation Experiment (OSSE) mode for the optimum development of the next generation of space and ground-based observing systems.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123563395","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

Forecasting land-use changes with the use of neural networks and GIS 基于神经网络和GIS的土地利用变化预测

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4424001

A. Vafeidis, S. Koukoulas, Ioannis Gatsis, K. Gkoltsiou

引用次数: 7

Inland lake monitoring using low and medium resolution ENVISAT ASAR and optical data: Case study of Poyang Lake (Jiangxi, P.R. China) 中低分辨率ENVISAT ASAR与光学数据的内陆湖监测——以江西鄱阳湖为例

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423876

R. Andreoli, H. Yésou, Jiren Li, Y. Desnos

引用次数: 9

On SAR hurricane wind speed ambiguities 关于SAR飓风风速模糊

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423359

Hui Shen, W. Perrie, Yijun He

{"title":"On SAR hurricane wind speed ambiguities","authors":"Hui Shen, W. Perrie, Yijun He","doi":"10.1109/IGARSS.2007.4423359","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423359","url":null,"abstract":"Radar backscattered signals over the ocean are dampened in extremely high winds, which leads to a wind speed ambiguity problem during the process of wind retrieval from synthetic aperture radar (SAR). This problem was firstly studied by Shen et al. (2007), where we proposed a wind speed ambiguity removal scheme for the two wind speed solutions that may exist for any given normalized radar cross section (NRCS) and wind direction. This approach is based on the operational geophysical model function (GMF) CMOD5. Recently, new C-band GMFs for high wind have been developed, among which, a HH polarized GMF was established for the first time. In this study, the wind speed ambiguity problem will be studied within the context of the available high wind GMFs, which are,CMOD5,CMOD4HW,HWGMF_V and HWGMF_H. For the wind retrieval from HH polarized SAR images, a hybrid empirical polarization ratio is generally adopted. To compare the different behavior of various GMF models, this polarization ratio is used to transform the HH polarized GMF into a W field. Although the wind speed ambiguity problem is found in most GMFs, the saturation wind speed where radar backscattered signals start to decrease is different for the various GMFs. We show that consideration of the wind speed ambiguity problem is important for high wind retrieval from SAR images, especially for category 5 hurricanes.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125421423","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: 3

Analysis of climate change from dry to wet phase in NW China with an aridity-wetness homogenized index 基于干湿均一化指数的中国西北干湿期气候变化分析

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423165

Pengxiang Wang, Youfei Zheng, Jinhai He, Qiang Zhang, Baojiang Wang

{"title":"Analysis of climate change from dry to wet phase in NW China with an aridity-wetness homogenized index","authors":"Pengxiang Wang, Youfei Zheng, Jinhai He, Qiang Zhang, Baojiang Wang","doi":"10.1109/IGARSS.2007.4423165","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423165","url":null,"abstract":"Based on 1960-2003 rainfall and small-sized evaporation pan measurements from 131 stations in NW China, an aridity-wetness homogenized index is proposed of rainfall and evaporation as the crucial components of hydrological equilibrium, whereupon research is made of space/time characteristics of the climate that may change from a warm, dry to warm, wet phase in this region. Results show that 1) a regional consistent anomaly serves as the paramount mode of the 1960- 2003 yearly dry and wet features, as well as the opposite feature in the NW (NE) to the SE (SW) is also the important modes for the annual dry and wet abnormality; 2) the space patterns for the arid and moist anomaly include the westerly, tableland and monsoon climates; 3) the annual arid and wet features display greatly humidification trends in the whole NW, westerly and tableland climate zones, with the westerly climate humidification stronger than and the trend of the tableland sub-zone, their abrupt change from arid to moist in the mid 1970s while the area on the fringe of monsoon climate in the southeast of NW China shows a trend of aridification, which is rather weak, however.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125530264","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: 4

Hyperspectral feature space partitioning via mutual information for data fusion 基于互信息的高光谱特征空间划分进行数据融合

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423946

S. Prasad, L. Bruce

{"title":"Hyperspectral feature space partitioning via mutual information for data fusion","authors":"S. Prasad, L. Bruce","doi":"10.1109/IGARSS.2007.4423946","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423946","url":null,"abstract":"Multi-source data fusion is being actively explored in the remote sensing community for robust automatic target recognition (ATR) and other similar applications. Such an approach exploits multiple, independent observations of a phenomenon and performs a feature level or a decision level fusion for ATR, scene classification, land cover mapping, etc. In this paper, we present a method that utilizes such fusion techniques to exploit hyperspectral data, which otherwise typically suffers from the small sample size problem, (i.e., there are typically not as many ground truth pixels as the dimensionality of the data). In this work, we study the efficacy of using higher order statistical information (using average mutual information) for a bottom up band grouping in a multi- classifier setup. The band grouping procedure is employed to partition the hyperspectral space into approximately independent subspaces. A classifier is assigned to each subspace in the partition. Final classification decisions are made by fusing local decisions from each subspace. The goal of this paper is to (1) perform subspace identification using the proposed mutual information based metric, (2) explore the effect of the design parameters on the fusion performance and, (3) compare the performance of decision level fusion with feature level fusion over the partitioned subspace.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125559263","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: 16

A new method for moving target indication and detection in multi-channel SAR data 一种多通道SAR数据中运动目标指示与检测的新方法

2007 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2007-07-23 DOI: 10.1109/IGARSS.2007.4423935

L. Lidicky

引用次数: 0