Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.615283
M. D. Pritt
This paper presents a comparative analysis of eight phase unwrapping algorithms for SAR interferometry that, in the opinion of the author, encompass the current "state of the art" in phase unwrapping. Four of the algorithms are path-following algorithms, and four are least-squares algorithms. The algorithms are described, and their characteristics, such as execution time and memory requirements, are summarized. The results of the algorithms on eight phase unwrapping problems are then presented, and recommendations for how to use the algorithms in practice are given.
{"title":"Comparison of path-following and least-squares phase unwrapping algorithms","authors":"M. D. Pritt","doi":"10.1109/IGARSS.1997.615283","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615283","url":null,"abstract":"This paper presents a comparative analysis of eight phase unwrapping algorithms for SAR interferometry that, in the opinion of the author, encompass the current \"state of the art\" in phase unwrapping. Four of the algorithms are path-following algorithms, and four are least-squares algorithms. The algorithms are described, and their characteristics, such as execution time and memory requirements, are summarized. The results of the algorithms on eight phase unwrapping problems are then presented, and recommendations for how to use the algorithms in practice are given.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"120 1","pages":"872-874 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85703913","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.615906
A. Collaro, G. Fornaro, G. Franceschetti, R. Lanari, Eugenio Sansosti, M. Tesauro
The authors present a comparison among phase unwrapping techniques based on local, global and a new procedure similar to genetic algorithms.
对基于局部、全局和一种类似遗传算法的相位展开技术进行了比较。
{"title":"Local, global and unconventional phase unwrapping techniques","authors":"A. Collaro, G. Fornaro, G. Franceschetti, R. Lanari, Eugenio Sansosti, M. Tesauro","doi":"10.1109/IGARSS.1997.615906","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615906","url":null,"abstract":"The authors present a comparison among phase unwrapping techniques based on local, global and a new procedure similar to genetic algorithms.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"69 1","pages":"433-435 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84073731","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.615818
S. Péloquin, Q. Hugh, J. Gwyn, D. Haboudane, R. Mendez, L. Rivard
The problems relating to landslides and intensive gullying are of primary concern in Bolivia, especially around the city of Cochabamba where thirty nine watersheds, pointing toward the city, are generating an impressive quantity of sediments, destroying fertile lands, and putting in jeopardy many farmers who make there living in these areas. One way of changing this situation, is to evaluate the susceptibility of landslides and applying measures for restricting or correcting the highly susceptible zones. Most of the existing methodologies used to perform this evaluation are done from aerial photography to collect the necessary data, before applying proper models. This study shows that the use of RADARSAT image (Fine mode), has the potential to replace or complement aerial photography for the identification of many parameters essential in the mapping of different susceptibility classes.
{"title":"Evaluation of RADARSAT image for landslide susceptibility mapping: application in Bolivia","authors":"S. Péloquin, Q. Hugh, J. Gwyn, D. Haboudane, R. Mendez, L. Rivard","doi":"10.1109/IGARSS.1997.615818","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615818","url":null,"abstract":"The problems relating to landslides and intensive gullying are of primary concern in Bolivia, especially around the city of Cochabamba where thirty nine watersheds, pointing toward the city, are generating an impressive quantity of sediments, destroying fertile lands, and putting in jeopardy many farmers who make there living in these areas. One way of changing this situation, is to evaluate the susceptibility of landslides and applying measures for restricting or correcting the highly susceptible zones. Most of the existing methodologies used to perform this evaluation are done from aerial photography to collect the necessary data, before applying proper models. This study shows that the use of RADARSAT image (Fine mode), has the potential to replace or complement aerial photography for the identification of many parameters essential in the mapping of different susceptibility classes.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"35 1","pages":"128-130 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78287859","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.609074
K. Takemata, Y. Kawata
This paper shows the estimated results of surface reflection parameters, such as the leaf inclination distribution function (LIDF) and the mixing ratio (/spl alpha/) of specular to diffuse component for a vegetated area, using the observed linear polarization data at 550 nm and 650 nm over lands measured by the airborne POLDER. The main results in this study can be summarized as follows: 1) The authors found the simplified Rondeaux-Herman model for "Forest01" and "Rice Field01" is able to show similar polarization variations against zenith viewing angles in the principal plane to the observed one. 2) The isotropic assumption of LIDF seems to be valid. The values of /spl alpha/ for "Forest01" are estimated to be /spl alpha/-0.50 and 0.20
{"title":"Estimation of surface reflection parameters over lands using linear polarization data by airborne POLDER","authors":"K. Takemata, Y. Kawata","doi":"10.1109/IGARSS.1997.609074","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.609074","url":null,"abstract":"This paper shows the estimated results of surface reflection parameters, such as the leaf inclination distribution function (LIDF) and the mixing ratio (/spl alpha/) of specular to diffuse component for a vegetated area, using the observed linear polarization data at 550 nm and 650 nm over lands measured by the airborne POLDER. The main results in this study can be summarized as follows: 1) The authors found the simplified Rondeaux-Herman model for \"Forest01\" and \"Rice Field01\" is able to show similar polarization variations against zenith viewing angles in the principal plane to the observed one. 2) The isotropic assumption of LIDF seems to be valid. The values of /spl alpha/ for \"Forest01\" are estimated to be /spl alpha/-0.50 and 0.20</spl alpha/<0.40 at 550 nm and 650 nm, respectively. Those for \"Rice Field01\" are to be /spl alpha//spl sim/0.50 and /spl alpha/0.40 at 550 nm and 650 nm, respectively.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"148 1","pages":"1790-1792 vol.4"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77879968","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.608922
D. Kasilingam, I. Lin, V. Khoo, L. Hock
Coincident and nearly co-located SAR wave mode data and scatterometer data are used to study the effect of swells in the ERS scatterometer measurements. It is shown that the speckle power in the SAR wave mode spectrum is a good measure of the mean radar backscatter from the ocean surface. The wind dependence of the speckle power is compared with the scatterometer winds with and without the effects of swell. It is shown that the speckle power increases in the presence of swell. The swells travelling in the azimuth direction have a greater impact on the speckle power than range travelling swells. It is argued that the wind speed dependence of the SAR speckle power enables the SAR to be used as a high resolution wind mapper.
{"title":"A study of the effect of swell in scatterometer wind measurements using ERS SAR wave mode data","authors":"D. Kasilingam, I. Lin, V. Khoo, L. Hock","doi":"10.1109/IGARSS.1997.608922","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.608922","url":null,"abstract":"Coincident and nearly co-located SAR wave mode data and scatterometer data are used to study the effect of swells in the ERS scatterometer measurements. It is shown that the speckle power in the SAR wave mode spectrum is a good measure of the mean radar backscatter from the ocean surface. The wind dependence of the speckle power is compared with the scatterometer winds with and without the effects of swell. It is shown that the speckle power increases in the presence of swell. The swells travelling in the azimuth direction have a greater impact on the speckle power than range travelling swells. It is argued that the wind speed dependence of the SAR speckle power enables the SAR to be used as a high resolution wind mapper.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"63 1","pages":"1512-1514 vol.4"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73176925","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.615895
Z. Yunhua, Jiang Jingshan
The authors give a brief introduction about their work on the development of computer software for simulation of the Spaceborne Multimode Microwave Sensors which will be launched in the future in China as scheduled. They have selected Borland C++ 3.1 for Windows based on Pentium PC as the developing platform, so plenty of colors can be guaranteed and a friendly interface can be easily realized. They have used some techniques of VISC (Visualization in Scientific Computing) for demo and graph presentation. This software is being improved and is not yet complete. The authors believe that it will be very useful not only in the design of spaceborne microwave sensors but also for enriching the measurement data library after it has bean completed.
简要介绍了将于未来在中国如期发射的星载多模微波传感器的计算机仿真软件开发工作。他们选择Borland c++ 3.1 for Windows作为开发平台，基于Pentium PC，因此可以保证丰富的颜色，并且易于实现友好的界面。他们使用了VISC (Visualization in Scientific Computing)的一些技术进行演示和图形表示。该软件正在改进中，尚未完成。作者认为，该方法不仅对星载微波传感器的设计具有重要意义，而且对丰富星载微波传感器的测量数据库具有重要意义。
{"title":"Computer simulation of Spaceborne Multimode Microwave Sensors","authors":"Z. Yunhua, Jiang Jingshan","doi":"10.1109/IGARSS.1997.615895","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615895","url":null,"abstract":"The authors give a brief introduction about their work on the development of computer software for simulation of the Spaceborne Multimode Microwave Sensors which will be launched in the future in China as scheduled. They have selected Borland C++ 3.1 for Windows based on Pentium PC as the developing platform, so plenty of colors can be guaranteed and a friendly interface can be easily realized. They have used some techniques of VISC (Visualization in Scientific Computing) for demo and graph presentation. This software is being improved and is not yet complete. The authors believe that it will be very useful not only in the design of spaceborne microwave sensors but also for enriching the measurement data library after it has bean completed.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"7 1","pages":"392-394 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79838129","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.609035
C. Yonezawa, S. Takeuchi
The authors tested the applicability of coherence information for optimizing SAR (synthetic aperture radar) interferogram. The purpose of the optimization in this study is to improve the smoothness of the topographic fringe in a SAR interferogram, which results in better fringe for unwrapping. Coherence information was computed as the complex correlation coefficient between two SAR complex data. To optimize the interferogram, the maximum coherence value was searched in 3/spl times/5 window around the initial registered position between two data and then the phase difference was obtained from the pixel pair that has the maximum coherence. This optimizing method was attempted for several SAR complex data pairs. The effect of the optimization was found in some pairs. It was found that the increase of the coherence clue to the optimization was one of the important factors for the improvement of the smoothness.
{"title":"Optimization of SAR interferogram by using coherence information","authors":"C. Yonezawa, S. Takeuchi","doi":"10.1109/IGARSS.1997.609035","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.609035","url":null,"abstract":"The authors tested the applicability of coherence information for optimizing SAR (synthetic aperture radar) interferogram. The purpose of the optimization in this study is to improve the smoothness of the topographic fringe in a SAR interferogram, which results in better fringe for unwrapping. Coherence information was computed as the complex correlation coefficient between two SAR complex data. To optimize the interferogram, the maximum coherence value was searched in 3/spl times/5 window around the initial registered position between two data and then the phase difference was obtained from the pixel pair that has the maximum coherence. This optimizing method was attempted for several SAR complex data pairs. The effect of the optimization was found in some pairs. It was found that the increase of the coherence clue to the optimization was one of the important factors for the improvement of the smoothness.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"311 1","pages":"1707-1709 vol.4"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79994416","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.615954
H. Holden, E. LeDrew
No quantitative means of remotely determining the biological vigour of a coral reef ecosystem exists. This renders consistent and replicable detection of coral health difficult. A quantitative index of submerged coral signatures would enable cost and time effective monitoring and management of coral reef resources, and would aid scientific studies of the extent and severity of coral bleaching. Principal components analysis is used to spectrally discriminate submerged bottom features, and broad band spectral albedos are used to estimate the SPOT and Landsat TM response.
{"title":"Spectral identification of coral biological vigour","authors":"H. Holden, E. LeDrew","doi":"10.1109/IGARSS.1997.615954","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.615954","url":null,"abstract":"No quantitative means of remotely determining the biological vigour of a coral reef ecosystem exists. This renders consistent and replicable detection of coral health difficult. A quantitative index of submerged coral signatures would enable cost and time effective monitoring and management of coral reef resources, and would aid scientific studies of the extent and severity of coral bleaching. Principal components analysis is used to spectrally discriminate submerged bottom features, and broad band spectral albedos are used to estimate the SPOT and Landsat TM response.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"49 1","pages":"610-612 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77190507","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.606441
D. Massonnet
The use of radar interferometry has now been amply demonstrated. The limits of the technique are well understood, if not always predictable. In addition, the basic signal processing procedure seems to have reached a plateau. Further improvements can only be achieved if the number of processed scenes and the variety of experiences in the people using the technique are greatly increased. This can be done only if the access to the interferometric technique is given to a large group of users who are not necessarily radar specialists and who use standard computers or workstations. The architecture used at CNES for interferometric processing, called DIAPASON, has been designed to be user friendly and to require minimal work through the use of standard interfaces. Initially designed for optimal signal processing and throughput, DIAPASON proved it could run automatically in the vast majority of cases. A first course session organized in 1996 for twelve geophysicists indicated that, in one week, they could learn to use the software and to perform trouble shooting when necessary. The software has been already distributed in several laboratories and countries for industrial as well as scientific use. The author describes the main features of the software and its conditions of use.
{"title":"Producing ground deformation maps automatically: the DIAPASON concept","authors":"D. Massonnet","doi":"10.1109/IGARSS.1997.606441","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.606441","url":null,"abstract":"The use of radar interferometry has now been amply demonstrated. The limits of the technique are well understood, if not always predictable. In addition, the basic signal processing procedure seems to have reached a plateau. Further improvements can only be achieved if the number of processed scenes and the variety of experiences in the people using the technique are greatly increased. This can be done only if the access to the interferometric technique is given to a large group of users who are not necessarily radar specialists and who use standard computers or workstations. The architecture used at CNES for interferometric processing, called DIAPASON, has been designed to be user friendly and to require minimal work through the use of standard interfaces. Initially designed for optimal signal processing and throughput, DIAPASON proved it could run automatically in the vast majority of cases. A first course session organized in 1996 for twelve geophysicists indicated that, in one week, they could learn to use the software and to perform trouble shooting when necessary. The software has been already distributed in several laboratories and countries for industrial as well as scientific use. The author describes the main features of the software and its conditions of use.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"6 1","pages":"1338-1340 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82130798","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}
Pub Date : 1997-08-03DOI: 10.1109/IGARSS.1997.606404
M. Kemppinen, T. Auer
Optical images provide a useful reference for passive microwave radiometer data. The images need not have state-of-the-art spatial resolution, but they should include positioning data and be produced and manipulated with ease. The paper introduces the HUT pushbroom video imager consisting of a video camera, frame grabber, controlling PC and optional attitude-DGPS. System calibration and pixel geopositioning are discussed, and an example image is presented.
{"title":"A cost-effective, airborne video system for producing rectified, geo-referenced digital images","authors":"M. Kemppinen, T. Auer","doi":"10.1109/IGARSS.1997.606404","DOIUrl":"https://doi.org/10.1109/IGARSS.1997.606404","url":null,"abstract":"Optical images provide a useful reference for passive microwave radiometer data. The images need not have state-of-the-art spatial resolution, but they should include positioning data and be produced and manipulated with ease. The paper introduces the HUT pushbroom video imager consisting of a video camera, frame grabber, controlling PC and optional attitude-DGPS. System calibration and pixel geopositioning are discussed, and an example image is presented.","PeriodicalId":64877,"journal":{"name":"遥感信息","volume":"37 1","pages":"1224-1226 vol.3"},"PeriodicalIF":0.0,"publicationDate":"1997-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82139803","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：