2007 IEEE International Geoscience and Remote Sensing Symposium最新文献

{"title":"Sensor application to international disaster management","authors":"T. vonDeak","doi":"10.1109/IGARSS.2007.4423748","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423748","url":null,"abstract":"This provides an overview of activities within the ITU and SFCG to raise the awareness of the regulatory community, particularly within developing countries, regarding the value of remote sensing operations to individual administrations.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"88 8 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":"128003810","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}

{"title":"Space - temporal and frequency - polarization variations in the electromagnetic wave interacting with the forest canopy","authors":"V. Mironov, E. Telpukhovsky, V. Yakubov, S. Novik, A. V. Klokov","doi":"10.1109/IGARSS.2007.4423370","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423370","url":null,"abstract":"An object of the studies in this paper is the electromagnetic field scattered by forest canopy. The purpose of this work are experimental studies of space-time and frequency correlations of the field amplitude arising due to wave interaction with the forest canopy. As a result, in a fairly broad frequency range from 0.1 to 1.0 GHz, there were obtained field autocorrelation functions in both the frequency and time domains, as well as field cross correlation functions, with the receivers being separated along the wave propagation direction and across that both in the horizontal and vertical directions. On the basis of measured data, the major mechanisms of wave scattering by forest canopy were analyzed in both the time and frequency domains. Three main partial waves, namely, direct, lateral, and reflected from the ground ones were identified through the interference picture registered. The results obtained are of great importance for developing data processing algorithms in remote sensing regarding the forest canopies.","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":"125633456","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}

{"title":"Retrieved sea surface salinity spatial variability using high resolution data within the soil moisture and ocean salinity (SMOS) mission","authors":"R. Sabia, Adriano Camps, C. Gommenginger, M. Srokosz","doi":"10.1109/IGARSS.2007.4423051","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423051","url":null,"abstract":"The soil moisture and ocean salinity mission will deliver from 2008 onwards global sea surface salinity estimations over the oceans. In this paper, efforts have been devoted to the analysis of horizontal retrieved salinity variability and to the capabilities of the SMOS-derived data to resolve different-scale observed oceanographic features. Statistics of the error have been provided using input/auxiliary data at increasingly higher spatial resolution.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"51 7 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":"126003983","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}

{"title":"Study of Himalayas Ice using MSMR Data","authors":"O. Calla, Sugandha Lohar","doi":"10.1109/IGARSS.2007.4423726","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423726","url":null,"abstract":"The study of the extent of ice on Himalayas has been done using data from different passive sensors on board satellites, starting from Nimbus. The Indian satellite OCEANSAT-I carried a microwave passive sensor MSMR operating at different frequencies 6.6, 10.6, 18 and 21 GHz with dual polarization having different spatial resolutions of the order of 150, 75 and 50 km. For study of snow and ice the higher frequency like 37 GHz gives better correlation. Here the study has been done at 18 GHz as 21 GHz frequency is affected by presence of water vapour. The frequency chosen gives the extent of snow/ice in the Himalayan region. The 18 GHz data, over certain location was compared with the data of 6.6 GHz as 6.6 GHz data can penetrate dry snow/ice and so when compared the idea of thickness of snow/ice could be assessed. The brightness temperature measured for vertical polarization is higher as compared to horizontal polarization in both frequencies. This indicates that the surface is smooth. The emissivity for smooth surface gives the variability of brightness temperatures in two different polarizations. Different areas of Himalayas have been chosen for the comparison of brightness temperature at two frequencies they are 6.6 GHz and 18 GHz. It is observed that the temperatures in 18 GHz are different as compared to 6.6 GHz for both V and H polarization. The temperature obtained at 6.6 GHz is not from the surface of ice but from certain depth where the effect of underlying land is observed. The brightness temperature at 18 GHz is mostly from surface which is close to dry ice/snow and so the brightness temperature is lower as compared to that obtained at 6.6 GHz The data for frequency channel 6.6 GHz covers larger grid so frequency channel 10.65 GHz is used for study of snow depth as it provides better results. In this paper the detailed study of Himalayan region at 10.65 GHz and 18 GHz frequencies is presented.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"57 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":"127928797","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}

{"title":"Lidar DEM for characterizing the volcanic landforms of tatun volcanoes in metropolitan taipei","authors":"Jin-King Liu, Y. Chan, T. Shih, Y. Hsieh","doi":"10.1109/IGARSS.2007.4423659","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423659","url":null,"abstract":"Tatun volcano group is a cluster of dormant volcanoes surrounding metropolitan Taipei. Rugged terrain, monotonic lithology and dense vegetation covers are adverse factors for mapping the geological structures. In this study, airborne lidar survey was conducted to obtain a bare ground DEM with 2 m grid and with an accuracy of decimeters. Shaded-relief images, pit-patterns and drainage networks are then derived from these DEMs for visual interpretation. 51 volcanoes are thus recognized. Two fissures running through the highest volcano in this area, namely Mount Seven-Stars, are extending 2000 m and 1000 m, respectively. The largest width and depth of the opening of the ruptures is located in the west flank of the volcanic cone. The slope angle of the east-wing of the volcanic cone is 36deg, whereas the angle of the west-wing is only 24.5deg. The opening of the west fissure is larger and its extension is longer than the east one. Thus, the west side can be subjected to an active extensional process of strain. The fissures could be resulted from the ongoing regional extension of the Tatun volcanic area due to the plate subduction and collision of the Eurasian plate and the Philippine sea plate.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"173 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":"132085020","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}

{"title":"Parallel computation of synthetic SAR raw data","authors":"M. Kalkuhl, P. Droste, W. Wiechert, H. Nies, O. Loffeld, M. Lambers","doi":"10.1109/IGARSS.2007.4422849","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4422849","url":null,"abstract":"For modern SAR data acquisition, bi- and multistatic SAR missions become increasingly important. Established methods for processing monostatic SAR signals need to be adapted to new algorithms for signal processing. In order to support the evolution and development of these new algorithms simulated SAR raw data of arbitrary bi- and multistatic SAR scenarios are essential. This paper refers to a modular SAR simulator, which is able to simulate complex bi- and multistatic SAR scenarios. It focuses on the geometrical simulation approach of the simulator and the computationally intensive synthesis of SAR raw data. The main part descripts the parallel implementation of the radar lobe footprint scan and of the succeeding SAR raw data generation executed on a compute cluster. An example will be shown, which compares the simulation of the same SAR scenario on three different compute systems and their runtimes.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"24 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":"132239574","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}

{"title":"The climate change and its ecosystem effect in the upper yellow river","authors":"Jianying Feng, Z. Yao, N. Guo, Mingling Gu, Hui Guo","doi":"10.1109/IGARSS.2007.4422916","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4422916","url":null,"abstract":"Based on meteorological and hydrological data collected from 1961 to 2004,NOAA/AVHRR NDVI data with 8times8 km spatial resolution from 1982 to 2003, climate change and its ecosystem effect are analyzed in the upper yellow river in this paper. The results showed that the change trend of temperature in the upper yellow river was consistent with global warming, and the increasing rate of annual mean soil temperature was higher than that of air temperature. Annual precipitation presented fluctuant change. Annual maximum frozen soil depth and annual runoff tends to decrease over the past 40 years, especially in 1990s.Dry and warming trend takes place both in climate and soil in the region, especially in soil. The drainage area of upper yellow river is an ecosystem fragility area, and it is sensitive to climate change. Our analyses indicated that grassland main growth periods are from May to October,NDVI peak value appeared in July in drainage area of the upper yellow river. Annual NDVI peak value and NDVI mean value could reflect preferably climate changes, and the trends of them appeared increased in some degree among oscillations in the past 20 years, which meant a better condition for vegetation growth or longer growing days in the study area. Furthermore, the temperature exhibits a more remarkable relativity than precipitation in the area.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"16 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":"132344875","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}

{"title":"Boundary-adaptive MRF classification of optical very high resolution images","authors":"G. Trianni, P. Gamba","doi":"10.1109/IGARSS.2007.4423091","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423091","url":null,"abstract":"Urban area classification of very high resolution optical images relies on the one hand on the precise characterization of homogenous spectral responses within objects. On the other hand, sharp edges between the same objects, usual in man-made environments, have to be correctly detected. These two conflicting requirements make adaptive algorithms more suitable fo the task. The present work is devoted to introduce and validate one of these adaptive algorithms, based on Markov random fields (MRF) and neural networks, the approach works in a separate way on the two parts of the image, homogeneous and non.homogeneous ones, and allows to take into account their peculiarities. As such, it proves to be more reliable and accurate than basic maximum likelihood or even MRF and neural network classifiers considered alone.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"36 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":"132400518","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}

{"title":"Disaster monitoring and environmental alert in Taiwan by repeat-pass spaceborne SAR","authors":"Chih-Tien Wang, Kun Shan Chen, Hong-Wei Lee, Jong-Sen Lee, W. Boerner, Ruei-Yuan Wang, H. Wan","doi":"10.1109/IGARSS.2007.4423384","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4423384","url":null,"abstract":"The prevailing complex geological and ecological conditions of Taiwan have drawn considerable attention from various geo-ecological communities because of their vulnerability to produce various natural hazards at different scales. Located in the tropical/subtropical zone of the Pacific Rim, its ecological and rugged mountainous properties are environmentally sensitive making monitoring and observations especially difficult because of the high population density. For example, in terms of natural hazard mitigation tectonically active regions are used for analyzing the cause of abundant risk events, such as earthquakes, landslides and land subsidence. In fact Taiwan is well suited as a test site for studying those geologically disastrous processes. Implementing novel techniques of space remote sensing has proved to be an effective means in recent years for greatly improving our understanding of these phenomena. In this paper we report on the monitoring of such events using multi-modal polarimetric and/or interferometric SAR images at C and L band from ERS, JERS-1, RADARSAT-1, ENVISAT, and from the recent ALOS satellite. For crustal and surface deformation, we used radar image pairs with long temporal baselines and large areas of coverage for investigating deformation over Western Taiwan. Pre-seismic and co-seismic deformation patterns are spatial-temporally analyzed. The other topic deals with the coastline changes observed from a sequence of ERS-1/2 SAR images within the years of 1996 to 2005. Waterlines were extracted using multi-scale procedures of edge detection and were corrected with tidal motion data. Substantial analyses were carried out in conjunction with ground surveys and lidar mapping. The topographic feature changes due to large scale landslides triggered by torrential rains were also monitored. In addition, the SAR interferograms were used to analyze the deposition changes along the riverbeds and riverbanks for short-intervals using optimal baselines. Summary and remarks on the implementation of such multi-modal polarimetric and/or interferometric SAR imagery for environmental monitoring are provided.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"481 1 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":"129982069","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}

{"title":"Clutter analysis of high resolution millimeter-wave SAR-data in the spatial and wavelet domain","authors":"P. Wellig, Konrad Schmid, H. Essen, A. Kurz, H. Schimpf, T. Brehm","doi":"10.1109/IGARSS.2007.4422855","DOIUrl":"https://doi.org/10.1109/IGARSS.2007.4422855","url":null,"abstract":"This paper presents the analysis of high resolution millimeter SAR clutter data, measured in a joint Swiss-German flight campaign. The generalized Gaussian function and the Kolmogorov-Smirnov test are considered to test the hypothesis of Gaussian clutter process. 35 GHz and 94 GHz data are compared. The results are presented in the time and wavelet domain, as the wavelet domain is an import transform domain for the development of terrain classification, target recognition and data compression algorithms.","PeriodicalId":284711,"journal":{"name":"2007 IEEE International Geoscience and Remote Sensing Symposium","volume":"70 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":"130147052","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}