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Applicability of category decomposition for the fusion of multi-resolution data 分类分解在多分辨率数据融合中的适用性
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.615313
S. Takeuchi, A. Inanaga
{"title":"Applicability of category decomposition for the fusion of multi-resolution data","authors":"S. Takeuchi, A. Inanaga","doi":"10.1109/IGARSS.1997.615313","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615313","url":null,"abstract":"The authors tested the applicability of the category decomposition method based on the linear mixture model for the fusion of multiple-resolution satellite data such as Landsat-TM and NOAA-AVHRR. The goal of the application of this method is to estimate the mixing ratio of different categories within one pixel of the lower-resolution data using the classification result of the higher-resolution data, which is considered to be useful for the extrapolation of the information from the higher-resolution data over the wider coverage of the lower-resolution data. The authors tested the estimation accuracy by two kinds of decomposition methods, the maximum likelihood estimation and the minimum distance estimation and also by the multiple regression method. The experimental results showed that the most adequate estimation was obtained by the category decomposition based on the minimum distance estimation.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90411063","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: 1
Retrieval of land surface temperature and water vapor content from AVHRR thermal imagery using an artificial neural network 基于人工神经网络的AVHRR热像反演地表温度和水汽含量
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.609165
S. Liang
{"title":"Retrieval of land surface temperature and water vapor content from AVHRR thermal imagery using an artificial neural network","authors":"S. Liang","doi":"10.1109/IGARSS.1997.609165","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.609165","url":null,"abstract":"AVHRR thermal imagery is sensitive to both water vapor content (WVC) and land surface temperature (LST). A new algorithm based on MODTRAN simulations and neural network regression technique for estimating WVC and LST from the two AVHRR thermal channels is developed. The Navy climatological profiles and measured atmospheric profiles from TOGA COARE upper-air sounding archive were used to simulate AVHRR channels 4 and 5 radiances with different combinations of surface temperature, emissivity, viewing zenith angle. The simulated radiances were then converted to brightness temperatures. A feedforward neural network was used to link those physical parameters with simulated brightness temperatures. This algorithm has been tested using measurements from BOREAS and HAPEX, and results indicate that this procedure performs reasonably well. The required improvements are also highlighted.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84855430","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: 2
Deriving glaciers variation integrated remote sensing and GIS in the Tibetan plateau 青藏高原冰川变化遥感与GIS集成研究
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.615899
Zhen Li, Q. Zeng
{"title":"Deriving glaciers variation integrated remote sensing and GIS in the Tibetan plateau","authors":"Zhen Li, Q. Zeng","doi":"10.1109/IGARSS.1997.615899","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615899","url":null,"abstract":"Glaciers on the Tibetan plateau play an important role in the Earth's climate system. Because of high altitude and difficulties in access, regular, systematic surveys of glacier variation are almost impossible in some regions of the Tibetan plateau. As a result, remote sensing techniques are at present the primary, in many cases the only way to measure the state of glaciers. In combination with GIS, it provides an efficient tool to analyze the current state and changes in glaciers. The authors used a technique of integrated remote sensing and GIS to map and measure on the changes in glaciers using a 21-year series of Landsat images (from 1973 to 1994) and topographic maps on a study site on the Tibetan plateau. The details of glacier fluctuation, such as area of glaciers and the changes in the magnitude of recession or advance of a glacier terminus on different dates, are described based on the results of image analysis, including coregistration, classification, vector analysis, and area calculation. Within the study area, during the 21 years, it was determined that the northern glaciers advanced and the southern glaciers retreated, the average rate of change was 50 to 105 m a/sup -1/. The results show that Landsat data provide an important source of information for studies of glacier variation.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76711287","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: 2
The NASA/JPL Airborne Synthetic Aperture Radar's 1996 PacRim deployment 1996年NASA/JPL机载合成孔径雷达的PacRim部署
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.606460
Y. Lou, Y. Kim, J. V. Van Zyl, L. Maldonado, T. Miller, E. O'Leary, G. Romero, W. Skotnicki, V. Taylor
{"title":"The NASA/JPL Airborne Synthetic Aperture Radar's 1996 PacRim deployment","authors":"Y. Lou, Y. Kim, J. V. Van Zyl, L. Maldonado, T. Miller, E. O'Leary, G. Romero, W. Skotnicki, V. Taylor","doi":"10.1109/IGARSS.1997.606460","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.606460","url":null,"abstract":"In November and December 1996, the NASA/JPL Airborne Synthetic Aperture Radar System (AIRSAR) embarked on a seven-week campaign to several Pacific Rim countries. This mission was jointly organized by NASA, Australia's Office of Space Science and Application, and University of New South Wales. The major purpose of the mission is to establish a collaborative effort in the area of radar remote sensing application between the United States and the Pacific Rim countries. SAR data were acquired for both U.S. researchers as well as the participating countries. In addition to Hawaii, the authors imaged areas of interest in New Zealand, Australia, Papua New Guinea, Malaysia, Brunei, the Philippines, Taiwan, Thailand, and Cambodia including coastal regions of some countries. The target areas of this multi-frequency, polarimetric and interferometric SAR system included volcanoes, sites for studies in geology, hydrology, and land use mapping, and forested mountains to generate height maps of rugged and inaccessible areas.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76910111","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
Passive microwave signatures of the melting layer in stratiform clouds 层状云中熔融层的被动微波特征
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.606421
Peter Bauer, J.P.V. Poiares Baptista, M. D. Iulis
{"title":"Passive microwave signatures of the melting layer in stratiform clouds","authors":"Peter Bauer, J.P.V. Poiares Baptista, M. D. Iulis","doi":"10.1109/IGARSS.1997.606421","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.606421","url":null,"abstract":"A study was carried out in order to estimate the effect of melting particles on brightness temperatures at microwave frequencies between 10.7 and 85.5 GHz. A meteorological model framework was set up to determine the melting stage of various frozen particles below the freezing layer. Different approaches for calculating the effective permittivity of mixed particles were compared. The resulting extinction coefficients, single scattering albedos, and asymmetry parameters indicate a maximum effect when a water matrix with air/ice inclusions is assumed. Extreme local differences of 20-25% between the optical parameters employing either a Marshall-Palmer or a Gamma-type dropsize distribution occur. When radiative transfer calculations are carried out, maximum deviations of >20 K at low frequencies are observed. Neglecting the melting effect may lead to severe overestimations of surface rainrates by up to 100% in stratiform conditions.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78555428","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
A simple model for the estimation of biomass density of regenerating tropical forest using JERS-1 SAR and its application to Amazon region image mosaics 基于JERS-1 SAR估算热带再生林生物量密度的简单模型及其在亚马逊地区图像拼接中的应用
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.609076
A. Luckman, J. Baker
{"title":"A simple model for the estimation of biomass density of regenerating tropical forest using JERS-1 SAR and its application to Amazon region image mosaics","authors":"A. Luckman, J. Baker","doi":"10.1109/IGARSS.1997.609076","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.609076","url":null,"abstract":"Regenerating tropical forests are important to the regional carbon balance because they represent areas of high carbon flux from the atmosphere to the land. These forests are complex in species distribution and structure so generalised models of radar backscatter are difficult to develop. However, empirical studies suggest a sensitivity of L-band SAR to the biomass density in these forests which may be employed to map and measure their growth. This paper investigates a simple empirical model representing the response of the JERS-1 SAR to the biomass density of regenerating forest in Brazil. This model was verified using independent data sources and employed to map biomass density over large regions of Amazonia from large scale JERS-1 image mosaics provided by NASDA.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75327064","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
Artificial recharge studies through remote sensing in central part of Tamil Nadu, India 在印度泰米尔纳德邦中部通过遥感进行人工补给研究
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.615789
S. Anbazhagan, S. Ramasamy, J. Edwin
{"title":"Artificial recharge studies through remote sensing in central part of Tamil Nadu, India","authors":"S. Anbazhagan, S. Ramasamy, J. Edwin","doi":"10.1109/IGARSS.1997.615789","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615789","url":null,"abstract":"A remote sensing based geological analysis was carried out in the hard rock terrains of Central Tamil Nadu, India. Rock-soil contact, pervious-impervious soil covered areas, structural trend lines and folded configurations and lineaments were interpreted from airborne and satellite data. Finally, the favourable domains were integrated with deep water level areas, the suitable sites for artificial recharge were identified.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75386413","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
SeaSat Scatterometer observations of sea ice 海冰的散射计观测
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.606428
C. Swift
{"title":"SeaSat Scatterometer observations of sea ice","authors":"C. Swift","doi":"10.1109/IGARSS.1997.606428","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.606428","url":null,"abstract":"SeaSat I Scatterometer data collected over the Beaufort Sea are analyzed and compared with a simple theoretical model that includes surface roughness and volume scattering. The values of the root-mean-square surface slope of roughness and the volume scattering albedo are adjusted to fit the data. With qualifications imposed on the theoretical assumptions, the data are well-modeled by the two parameters, and the sensor offers a means to monitor the statistical properties of sea ice in existing satellite scatterometers experiments, such as the European Remote Sensing Satellite and the NSCAT on the Japanese ADEOS I Spacecraft.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75228358","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
Reduction of the phase-unwrapping drawbacks by the three-antenna interferometric SAR system 减少三天线干涉SAR系统的相位展开缺陷
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.608933
G. Corsini, M. Diani, F. Lombardini, G. Pinelli
{"title":"Reduction of the phase-unwrapping drawbacks by the three-antenna interferometric SAR system","authors":"G. Corsini, M. Diani, F. Lombardini, G. Pinelli","doi":"10.1109/IGARSS.1997.608933","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.608933","url":null,"abstract":"One of the most critical steps of SAR interferometry for elevation mapping is the phase-unwrapping procedure. This paper analyzes the reduction of the phase-unwrapping drawbacks obtainable by using a recently proposed three-antenna SAR interferometer and a statistically optimal processor to estimate directly the interferometric phase with reduced ambiguity. A simulation of realistic scenarios is carried out. The performance analysis shows that the new technique significantly outperforms the conventional one, especially for high-relief terrains.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75969127","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: 6
RADARSAT-1 Background Mission for a global SAR coverage RADARSAT-1背景任务，用于全球SAR覆盖
遥感信息 Pub Date : 1997-08-03 DOI: 10.1109/IGARSS.1997.606402
A. Mahmood
{"title":"RADARSAT-1 Background Mission for a global SAR coverage","authors":"A. Mahmood","doi":"10.1109/IGARSS.1997.606402","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.606402","url":null,"abstract":"RADARSAT-1 Background Mission is the first attempt ever to acquire uniform global synthetic aperture radar (SAR) data in various seasons and imaging modes. A multi-mode global coverage is made possible by making use of the flexible imaging parameters of the satellite and its real-time as well as on-board recording capabilities. Synoptic, continental scale coverages along with local time-sensitive and application-specific data collections are planned. All data acquired under Background Mission are archived and, like the archives of any other RADARSAT-1 data, are accessible to the user community for its scientific and operational needs. RADARSAT-1 Background Mission started with the commencement of normal satellite operations in April 1996. This article reports on the progress made so far in the first two coverages of the world, one with the ScanSAR Wide and the other with the Standard 7 imaging beams of RADARSAT-1 SAR.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76230337","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
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