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Wave Coherence Measurements Using Synthetic Aperture Radar
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Book Synopsis Wave-Coherence Measurements Using Synthetic Aperture Radar by :
Download or read book Wave-Coherence Measurements Using Synthetic Aperture Radar written by and published by . This book was released on 2000 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A critical issue in the design of large floating structures such as those being considered in the Mobile Offshore Base (MOB) effort currently being pursued by the U.S. Navy is the nature of the ocean-wave field viewed on scales of 2 km or more. Of prime concern is the ability to assess the spatial coherence of the wave field or the probability of occurrence of long, unbroken wave crests for various environmental conditions. This report describes an effort to use satellite-based synthetic-aperture radar images to determine the crest-length statistics for ocean waves. The first portion of the study examined the feasibility of using SAR image data to determine the crest length distribution, which was shown the be directly related to the directional spread of the spectrum. A fully nonlinear SAR model was used in a simulation study to assess the impact of imaging effects on the resulting measures. For the cases examined, the errors in estimated directional spread were generally less than 20-30% and were conservative when the SAR look direction was within 200 of the propagation direction. The errors were shown to increase with increasing significant wave height, increasing directional spread, and increasing angle between the wave propagation direction and the SAR look direction. The second portion of the study developed a methodology to estimate the wave spectrum directly from the SAR-image spectrum via a variational inversion procedure. The methodology was successful, and the results from ERS SAR data indicate that errors in spectral parameters such as the mean wave length and directional spread are strongly dependent on the signal to noise ratio, as measured by the peak image spectral density. Errors become large when the peak spectral density falls below about 10 sq m for ERS SAR data. Above this level, estimates of wave length arid directional spread are accurate to within about 10-20%.
Book Synopsis Measurement of Non-Linear Internal Waves and Their Interaction with Surface Waves Using Coherent Real Aperture Radars by :
Download or read book Measurement of Non-Linear Internal Waves and Their Interaction with Surface Waves Using Coherent Real Aperture Radars written by and published by . This book was released on 2007 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of the grant were to use a coherent real aperture radar to 1) study the interaction of surface waves with internal wave, the process that is responsible for the synthetic aperture radar (SAR) imagery of internal waves; 2) Determine the extent to which Doppler velocity modulations observed by coherent radars, including along-track interferometric SARs, are faithful representations of surface currents generated by internal waves; and 3) track the temporal and spatial development of internal waves as they are generated, propagate and dissipate.
Book Synopsis Measurements of Ocean Surface Waves Using Synthetic Aperture Radar by : Hany Mohamed Assal
Download or read book Measurements of Ocean Surface Waves Using Synthetic Aperture Radar written by Hany Mohamed Assal and published by . This book was released on 1981 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Imaging with Synthetic Aperture Radar by : Didier Massonnet
Download or read book Imaging with Synthetic Aperture Radar written by Didier Massonnet and published by EPFL Press. This book was released on 2008-05-01 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing a field that has been transformed by the recent availability of data from a new generation of space and airborne systems, the authors offer a synthetic geometrical approach to the description of synthetic aperture radar, one that addresses physicists, radar specialists, as well as experts in image processing.
Book Synopsis Ocean Wave Measurements Using Complex Synthetic Aperture Radar Data by : Johannes Schulz-Stellenfleth
Download or read book Ocean Wave Measurements Using Complex Synthetic Aperture Radar Data written by Johannes Schulz-Stellenfleth and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic Aperture Radar by : John J. Kovaly
Download or read book Synthetic Aperture Radar written by John J. Kovaly and published by Artech House Publishers. This book was released on 1976 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic Impulse and Aperture Radar (SIAR) by : Baixiao Chen
Download or read book Synthetic Impulse and Aperture Radar (SIAR) written by Baixiao Chen and published by John Wiley & Sons. This book was released on 2014-01-15 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analyzes and discusses the operating principle, signal processing method, and experimental results of this advanced radar technology This book systematically discusses the operating principle, signal processing method, target measurement technology, and experimental results of a new kind of radar called synthetic impulse and aperture radar (SIAR). The purpose is to help readers acquire an insight into the concept and principle of the SIAR, to know its operation mode, signal processing method, the difference between the traditional radar and itself, the designing ideals, and the developing method. It includes 10 chapters. Chapter 1 gives an introduction to the basic principle of SIAR and its characteristic of four antis. Chapter 2 introduces the operating principles and system constitution of SIAR. Chapter 3 presents the main waveforms and the corresponding signal processing methods. Chapter 4 is about the long-time integration technique. Chapter 5 shows the high-accuracy measurement and tracking of 4D parameters of target in SIAR. The range-angle coupling and decoupling are introduced in Chapter 6, where a criteria for transmit frequency optimization of array elements is studied to overcome the coupling among range, azimuth and elevation. In Chapter 7, detection and tracking of targets in strong interference background is investigated. Chapter 8 analyzes quantitatively the influence of array error on the tracking accuracy of SIAR. Expansion of impulse and aperture synthesis to HF band and microwave band are introduced respectively in Chapter 9 and Chapter 10. The operating principle of the novel bi-static surface wave radar system, as well as the experimental system and the experimental results are included in Chapter 9. Written by a highly experienced author with extensive knowledge of SIAR (Chen), the book can be used as a reference for engineering technical personnel and scientific research personnel working in the research of SIAR, MIMO radar, digital radar or other new type of radar. It can also be a reference for teachers and students in universities who engage in related professional work. Details the operating principle, signal processing method, target measurement technology, and experimental results of synthetic impulse and aperture radar (SIAR) Expands the technique of impulse and aperture synthesisfrom the VHF band to the HF band and the microwave band Written by a leading author with many years’ research and practical experience in sparse array SIAR, a typical MIMO radar Engineers, researchers and postgraduates working in radar engineering will find this an invaluable resource.
Book Synopsis Polarimetric Radar Imaging by : Jong-Sen Lee
Download or read book Polarimetric Radar Imaging written by Jong-Sen Lee and published by CRC Press. This book was released on 2017-12-19 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent launches of three fully polarimetric synthetic aperture radar (PolSAR) satellites have shown that polarimetric radar imaging can provide abundant data on the Earth’s environment, such as biomass and forest height estimation, snow cover mapping, glacier monitoring, and damage assessment. Written by two of the most recognized leaders in this field, Polarimetric Radar Imaging: From Basics to Applications presents polarimetric radar imaging and processing techniques and shows how to develop remote sensing applications using PolSAR imaging radar. The book provides a substantial and balanced introduction to the basic theory and advanced concepts of polarimetric scattering mechanisms, speckle statistics and speckle filtering, polarimetric information analysis and extraction techniques, and applications typical to radar polarimetric remote sensing. It explains the importance of wave polarization theory and the speckle phenomenon in the information retrieval problem of microwave imaging and inverse scattering. The authors demonstrate how to devise intelligent information extraction algorithms for remote sensing applications. They also describe more advanced polarimetric analysis techniques for polarimetric target decompositions, polarization orientation effects, polarimetric scattering modeling, speckle filtering, terrain and forest classification, manmade target analysis, and PolSAR interferometry. With sample PolSAR data sets and software available for download, this self-contained, hands-on book encourages you to analyze space-borne and airborne PolSAR and polarimetric interferometric SAR (Pol-InSAR) data and then develop applications using this data.
Book Synopsis Measurements of Directional Wave Spectra by the Shuttle Synthetic Aperture Radar by : F. M. Monaldo
Download or read book Measurements of Directional Wave Spectra by the Shuttle Synthetic Aperture Radar written by F. M. Monaldo and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Millimeter Wave Synthetic Aperture Radar Technology by : Hui Wang
Download or read book The Millimeter Wave Synthetic Aperture Radar Technology written by Hui Wang and published by Springer Nature. This book was released on with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polarimetric Synthetic Aperture Radar by : Irena Hajnsek
Download or read book Polarimetric Synthetic Aperture Radar written by Irena Hajnsek and published by Springer Nature. This book was released on 2021-03-24 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book focuses on the practical application of electromagnetic polarimetry principles in Earth remote sensing with an educational purpose. In the last decade, the operations from fully polarimetric synthetic aperture radar such as the Japanese ALOS/PalSAR, the Canadian Radarsat-2 and the German TerraSAR-X and their easy data access for scientific use have developed further the research and data applications at L,C and X band. As a consequence, the wider distribution of polarimetric data sets across the remote sensing community boosted activity and development in polarimetric SAR applications, also in view of future missions. Numerous experiments with real data from spaceborne platforms are shown, with the aim of giving an up-to-date and complete treatment of the unique benefits of fully polarimetric synthetic aperture radar data in five different domains: forest, agriculture, cryosphere, urban and oceans.
Book Synopsis The Use of Synthetic Aperture Radar (SAR) to Measure Waves by : M. J. Tucker
Download or read book The Use of Synthetic Aperture Radar (SAR) to Measure Waves written by M. J. Tucker and published by . This book was released on 1981 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthetic Aperture Radar by : J. Patrick Fitch
Download or read book Synthetic Aperture Radar written by J. Patrick Fitch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar, like most well developed areas, has its own vocabulary. Words like Doppler frequency, pulse compression, mismatched filter, carrier frequency, in-phase, and quadrature have specific meaning to the radar engineer. In fact, the word radar is actually an acronym for RAdio Detection And Rang ing. Even though these words are well defined, they can act as road blocks which keep people without a radar background from utilizing the large amount of data, literature, and expertise within the radar community. This is unfortunate because the use of digital radar processing techniques has made possible the analysis of radar signals on many general purpose digi tal computers. Of special interest are the surface mapping radars, such as the Seasat and the shuttle imaging radars, which utilize a technique known as synthetic aperture radar (SAR) to create high resolution images (pic tures). This data appeals to cartographers, agronomists, oceanographers, and others who want to perform image enhancement, parameter estima tion, pattern recognition, and other information extraction techniques on the radar imagery. The first chapter presents the basics of radar processing: techniques for calculating range (distance) by measuring round trip propagation times for radar pulses. This is the same technique that sightseers use when calculat ing the width of a canyon by timing the round trip delay using echoes. In fact, the corresponding approach in radar is usually called the pulse echo technique.
Book Synopsis Synthetic Aperture Radar Signal Processing with MATLAB Algorithms by : Mehrdad Soumekh
Download or read book Synthetic Aperture Radar Signal Processing with MATLAB Algorithms written by Mehrdad Soumekh and published by Wiley-Interscience. This book was released on 1999-04-27 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date analysis of the SAR wavefront reconstruction signal theory and its digital implementation With the advent of fast computing and digital information processing techniques, synthetic aperture radar (SAR) technology has become both more powerful and more accurate. Synthetic Aperture Radar Signal Processing with MATLAB Algorithms addresses these recent developments, providing a complete, up-to-date analysis of SAR and its associated digital signal processing algorithms. This book introduces the wavefront reconstruction signal theory that underlies the best SAR imaging methods and provides clear guidelines to system design, implementation, and applications in diverse areas-from airborne reconnaissance to topographic imaging of ocean floors to surveillance and air traffic control to medical imaging techniques, and numerous others. Enabling professionals in radar signal and image processing to use synthetic aperture technology to its fullest potential, this work: * Includes M-files to supplement this book that can be retrieved from The MathWorks anonymous FTP server at ftp://ftp.mathworks.com/pub/books/soumekh * Provides practical examples and results from real SAR, ISAR, and CSAR databases * Outlines unique properties of the SAR signal that cannot be found in other information processing systems * Examines spotlight SAR, stripmap SAR, circular SAR, and monopulse SAR modalities * Discusses classical SAR processing issues such as motion compensation and radar calibration
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Signal and Image Processing for Remote Sensing by : C.H. Chen
Download or read book Signal and Image Processing for Remote Sensing written by C.H. Chen and published by CRC Press. This book was released on 2006-10-09 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most data from satellites are in image form, thus most books in the remote sensing field deal exclusively with image processing. However, signal processing can contribute significantly in extracting information from the remotely sensed waveforms or time series data. Pioneering the combination of the two processes, Signal and Image Processing for Re
Book Synopsis Radar Imaging of the Ocean Waves by : Mikhail B. Kanevsky
Download or read book Radar Imaging of the Ocean Waves written by Mikhail B. Kanevsky and published by Elsevier. This book was released on 2008-09-15 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to studying the ocean with radar tools, in particular, with space radars. Being intended mainly for the scientists preoccupied with the problem (as well as senior course students), it concentrates and generalizes the knowledge scattered over specialized journals. The significant part of the book contains the results obtained by the author. Systematically collects and describes the approaches used by different laboratories and institutions Deals with the physics of radar imagery and specifically with ocean surface imagery Useful for students and researchers specializing in the area of ocean remote sensing using airborne or space-borne radars, both SAR and RAR
