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[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium最新文献

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Calibration of a K-Band Autocorrelation Radiometer k波段自相关辐射计的校正
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.578470
P. Gaiser, W.C. Boncyk, C. Swift
{"title":"Calibration of a K-Band Autocorrelation Radiometer","authors":"P. Gaiser, W.C. Boncyk, C. Swift","doi":"10.1109/IGARSS.1992.578470","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.578470","url":null,"abstract":"The following paper describes a K-Band Autocorrelation Radiometer called CORRAD. The purpose of CORRAD is to measure tropospheric water vapor. A description of the hardware is included. The calibration technique is described in detail.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133749493","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
IR and microwave sea surface observations under calm weather conditions 无风条件下的红外和微波海面观测
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.576684
V. Etkin, A. Kuzmin, Y.G. Trokhimoveky
{"title":"IR and microwave sea surface observations under calm weather conditions","authors":"V. Etkin, A. Kuzmin, Y.G. Trokhimoveky","doi":"10.1109/IGARSS.1992.576684","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.576684","url":null,"abstract":"","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133781812","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
Pigment Concentration Derived From Ocean Color 从海洋色中提取的颜料浓度
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.576681
I. Sano, S. Mukai
{"title":"Pigment Concentration Derived From Ocean Color","authors":"I. Sano, S. Mukai","doi":"10.1109/IGARSS.1992.576681","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.576681","url":null,"abstract":"A procedure to derive the chlorophyll map using the CZCS data is described here. Phytoplankton pigment concentration near the sea surface is estimated from the ocean color data. It is shown here how 11. SYSTEM FLOW to derive an improved pigment map of the sea surface from the Nimbus-7 CZCS data, and also shown that the obtained results partly coincide with the truth data near Japan.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115522906","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
Inversion of Surface Parameters Using Fast Learning Neural Networks 基于快速学习神经网络的曲面参数反演
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.578294
M. Dawson, J. Olvera, A. Fung, M. Manry
{"title":"Inversion of Surface Parameters Using Fast Learning Neural Networks","authors":"M. Dawson, J. Olvera, A. Fung, M. Manry","doi":"10.1109/IGARSS.1992.578294","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.578294","url":null,"abstract":"A neural network approach to the inversion of surface scattering parameters is presented. Simulated data sets based on a surface scattering model are used so that the data may be viewed as taken from a completely known randomly rough surface. The fast learning (FL) neural network and a multilayer perceptron (MLP) trained with backpropagation learning (BP network) are tested on the simulated backscattering data. The RMS error of training the FL network is found to be less than one half the error of the BP network while requiring one to two orders of magnitude less CPU time. When applied to inversion of parameters from a statistically rough surface, the FL method is successful at recovering the surface permittivity, the surface correlation length, and the RMS surface height in less time and with less error than the BP network. Further applications of the FL neural network to the inversion of parameters from backscatter measurements of an inhomogeneous layer above a half space are shown.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115646158","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: 39
Satellite Aerosols Retrieval Over Land Surfaces Using the Structure Functions 利用结构函数反演地表卫星气溶胶
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.578487
D. Tanré, E. Vermote, B. Holben, Y. Kaufman
{"title":"Satellite Aerosols Retrieval Over Land Surfaces Using the Structure Functions","authors":"D. Tanré, E. Vermote, B. Holben, Y. Kaufman","doi":"10.1109/IGARSS.1992.578487","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.578487","url":null,"abstract":"Remote sensing of aerosol optical thickness from space is difficult over continental surfaces. There are two retrieval algorithms, one based on the use of dark targets and a second based on contrast reduction between selected pixels. Improvements in the contrast reduction method are reported. A procedure is developed for using the satellite image to evaluate whether conditions for applying the structure method are met. The theoretical background is discussed, and the usefulness of the structure functions is demonstrated. The method is applied to NOAA Advanced Very High Resolution Radiometer (AVHRR) imagery where simultaneous ground measurements are used for validation.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124194757","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: 11
A Regional Sahelian Grassland Model to Be Coupled with Satellite Multispectral Data 与卫星多光谱数据耦合的区域萨赫勒草原模式
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.578655
E. Mougin, D. Lo Seen, S. Rambal, B. Lacaze
{"title":"A Regional Sahelian Grassland Model to Be Coupled with Satellite Multispectral Data","authors":"E. Mougin, D. Lo Seen, S. Rambal, B. Lacaze","doi":"10.1109/IGARSS.1992.578655","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.578655","url":null,"abstract":"","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114572349","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: 10
Expert System Based On Knowledge Extraction From A GIS 基于GIS知识抽取的专家系统
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.576700
Ke Zhang
{"title":"Expert System Based On Knowledge Extraction From A GIS","authors":"Ke Zhang","doi":"10.1109/IGARSS.1992.576700","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.576700","url":null,"abstract":"Expert systems (ES) have been shown to be useful in many areas of natural resource and environmental impact studies. However, the major obstacle in the development of expert system is difficult to extract expert’s knowledge into a knowledge base. An alternative approach that can overcome the obstacle is to extract domain knowledge from information system by machine learning. This study is the first experiment of knowledge extraction from geographic information system (KEGIS). Major effort in this study is to develop a landuse expert system with a knowledge base that is generated by learning from sample data of a geographic information system (GIS). In this study, 154 sample areas were selected from Wongnute County, Inner Mongolia, for knowledge base extraction. With the landuse knowledge base, an inference engine, and a user interface, a landuse expert system has been constructed for landuse consulting. In an accuracy test, The landuse expert system can provide 73% of correct siggestions. This result ;how& that the knowledge base created by KEGIS can closely represent the ’real world‘.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114812288","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: 7
Land Imaging with Reconstructed High-Resolution Seasat-A Scatterometer Data an Amazon Experiment 重建高分辨率Seasat-A散射计数据的陆地成像与亚马逊河流域实验
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.578322
P. Hardin, D. G. Long
{"title":"Land Imaging with Reconstructed High-Resolution Seasat-A Scatterometer Data an Amazon Experiment","authors":"P. Hardin, D. G. Long","doi":"10.1109/IGARSS.1992.578322","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.578322","url":null,"abstract":"Satellite wind scatterometers are microwave radars designed to measure near-surface wind speed and direction over the oceans. This was the primary mission for the Seasat-A Scatterometer (SASS), which acquired 14.6 Ghz data over 50 km resolution cells during its three month mission in 1978. However, an image reconstruction technique utilizing overlap in resolution cells from successive satellite orbits can improve that spatial resolution to 5 km over land. An experiment conducted on a reconstructed image of central South America illustrates the potential of this imagery for discriminating between tropical forest, woodland, and tropical grass-shrubland. The potential for deriving geophysical information from reconstructed scatterometer imagery of the earth's surface is discussed.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114546450","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
SAR Focusing In Non-standard Geometries: A Generalized Approach 非标准几何SAR聚焦:一种广义方法
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.576714
A. Monti-Guarnieri, C. Prati, F. Rocca
{"title":"SAR Focusing In Non-standard Geometries: A Generalized Approach","authors":"A. Monti-Guarnieri, C. Prati, F. Rocca","doi":"10.1109/IGARSS.1992.576714","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.576714","url":null,"abstract":"Wave domain SAR focusing can he exactly implemented hp means of the Stolt interpolation if rectangular geometries are assumed and targets are fixed. However, when target’s motion has to he considered, or when the sensor trajectory is not a straight line parallel to the sources, the Stolt interpolation is just an approximation. This paper introduces first an exact focusing technique for uniform target motion. Secondly, the Stolt interpolation is extended to non rectilinear motion of the sensors.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"391 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120864980","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
An Explicit Canopy Brdf Model and Inversion 一种显式冠层Brdf模型及其反演
[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium Pub Date : 1992-05-26 DOI: 10.1109/IGARSS.1992.578490
S. Liang, A. Strahler
{"title":"An Explicit Canopy Brdf Model and Inversion","authors":"S. Liang, A. Strahler","doi":"10.1109/IGARSS.1992.578490","DOIUrl":"https://doi.org/10.1109/IGARSS.1992.578490","url":null,"abstract":"Based on a rigorous canopy radiative transfer equation, the multiple scattering radiance is approximated by the asymptotic theory, and the single scattering radiance calculation, which requires an numerical intergration due to considering the hotspot effect, is simplified. A new formulation is presented to obtain more exact angular dependence of the sky radiance distribution. The unscattered solar radiance and single scattering radiance are calculated exactly, and the multiple scattering is approximated by the delta two-stream atmospheric radiative transfer model. The numerical algorithms prove that the parametric canopy model is very accurate, especially when the viewing angles are smaller than 55 deg. The Powell algorithm is used to retrieve biospheric parameters from the ground measured multiangle observations.","PeriodicalId":441591,"journal":{"name":"[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium","volume":"41 5-6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116167663","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
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