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Radar Reflectivity Of Sea Targets
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Book Synopsis RADAR REFLECTIVITY OF SEA TARGETS by :
Download or read book RADAR REFLECTIVITY OF SEA TARGETS written by and published by . This book was released on 1967 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume I of this two-volume survey presents a broad overview of the state of knowledge of radar reflectivity of sea targets. All forms of targets are considered, including ships and boats, submarines, periscopes and snorkels, wakes, buoys, icebergs, and splashes. Also discussed are the statistical properties of returns, glint, and camouflage. Several approximate theories which have been advanced to explain the radar return of sea targets are reviewed and compared, and additional theoretical work is reported which indicates that there are serious limitations inherent in the commonly used coherent model. The effective cross-section of a target on a reflective surface is emphasized as being the product of the inherent (free-space) cross-section times F to the 4th power, the fourth power of the pattern propagation factor. Suggestions are made for interpreting World War II cross-section values for present-day systems studies. It is recommended that extensive experimental measurement data be obtained on a few targets rather than fragmentary data on many targets. This should lead to better understanding of the general problem and, eventually, to possible techniques for predicting the radar cross-sections of sea targets.
Book Synopsis Radar Reflectivity of Sea Targets by : Henry Archibald Corriher
Download or read book Radar Reflectivity of Sea Targets written by Henry Archibald Corriher and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Target Detection by Marine Radar by : John N. Briggs
Download or read book Target Detection by Marine Radar written by John N. Briggs and published by IET. This book was released on 2004-12-03 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar is a legal necessity for the safe navigation of merchant ships, and within vessel traffic services is indispensable to the operation of major ports and harbours. Target Detection by Marine Radar concentrates solely on civil marine operations and explains how marine surveillance radars detect their targets. The book is fully illustrated and contains worked examples to help the reader understand the principles underlying radar operation and to quantify the importance of factors such as the technical features of specific equipment, the weather, target reflection properties, and the ability of the operator. The precision with which targets are positioned on the radar screen and with which their progress is tracked or predicted depends on how definitely they have been detected, therefore a whole chapter has been devoted to the issue of accuracy. The various international regulations governing marine radar are examined, a brief historical background is given to modern day practice and the book doses with a discussion of the ways in which marine radar may develop to meet future challenges.
Book Synopsis Radar Reflectivity of Land and Sea by : Maurice W. Long
Download or read book Radar Reflectivity of Land and Sea written by Maurice W. Long and published by Artech House Publishers. This book was released on 1983 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This state-of-the-art edition of a radar classic brings you up-to-date on new developments in clutter measurement and modeling and features a wealth of new information not found in other currently available books. Authored by a recognized expert in the field, the book covers everything from basic concepts of radar reflectivity to space-time clutter amplitude and bistatic clutter.
Book Synopsis Radar Sea Clutter by : Luke Rosenberg
Download or read book Radar Sea Clutter written by Luke Rosenberg and published by IET. This book was released on 2021-12-17 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents comprehensive coverage of new research into sea clutter characterisation and modelling, radar performance prediction and maritime target detection. The book also includes a summary of sea-clutter scattering characteristics and datasets provided that can be used for modelling.
Book Synopsis Millimeter-wave Radar Targets and Clutter by : Gennadiĭ Petrovich Kulemin
Download or read book Millimeter-wave Radar Targets and Clutter written by Gennadiĭ Petrovich Kulemin and published by Artech House. This book was released on 2003 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ground-breaking resource offers you a detailed treatment of EDGE and its critical role in the development of the mobile Internet. The book explains how this global radio based high-speed mobile data standard can be introduced into GSM/GPRS networks, improving data transmission speeds to support multimedia services. It enables you to become thoroughly knowledgeable of EDGE specifications and covers concepts pertaining to several domains, including RF, signal processing, digital communications and communication networks.
Book Synopsis Technical Abstract Bulletin by : Defense Documentation Center (U.S.)
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High resolution methods for small target detection and estimation in high frequency radar by : Jian Wang (Ph. D.)
Download or read book High resolution methods for small target detection and estimation in high frequency radar written by Jian Wang (Ph. D.) and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The detection and tracking of small slow moving targets by High Frequency Surface Wave radar are limited by the presence of a dominate sea clutter spectrum. The ocean surface behaves as a distributed source in contrast to targets that are point sources. It is shown that by mapping data to eigenspaces, the sea clutter level decreases due to its nondeterministic behaviour while point targets' levels remain unchanged. The high resolution (subspace-based or eigenspace) methods and frequency tracking method for slowly time varying frequencies are evaluated to suppress this sea clutter to enhance detection of weak signals. Experimental results verify the advantage of subspace-based methods over the traditional processing techniques. Conventional subspace methods can be utilized to enhance the detection, but they deteriorate dramatically in the presence of correlated sea clutter. In our thesis some adaptive sea clutter pre-filtering schemes are introduced which improve the threshold and accuracy of subsequent subspace methods. Both simulated and real ship targets are used to verify the effectiveness of our proposed method. Furthermore, we propose another novel subspace algorithm to estimate the directions of arrival of superimposed cisoidal radar echoes from far-field targets in the radar pulse domain. The improvement provided by this algorithm is based on the use of a state space model that more accurately represents the received Doppler radar array signal prior to spatial processing such as MUSIC. A 2-d (spatial and temporal) pre-filtering matrix is structured and applied to the received array signal, which is finally combined with the high-resolution (MUSIC) method for DOA estimation. Lower resolution threshold and estimation variance are achieved by this algorithm compared to conventional beam-space MUSIC and sensor-space MUSIC. A simplified theoretical resolution threshold is derived, and both the theory and simulations verify the effectiveness of our proposed algorithm. Results from an experiment using a simulated target superimposed on real HF radar sea clutter also confirm the algorithm.
Book Synopsis Simulation of a Weather Radar Display for Over-water Airborne Radar Approaches by :
Download or read book Simulation of a Weather Radar Display for Over-water Airborne Radar Approaches written by and published by . This book was released on 1983 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radar Cross Sections of Distributed Targets Low Over Water in the Presence of Multipath Reflections by :
Download or read book Radar Cross Sections of Distributed Targets Low Over Water in the Presence of Multipath Reflections written by and published by . This book was released on 2001 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The radar cross section (RCS) of 667 reflectors displayed in a 1-m-high array directly above the sea surface is calculated with multipath present and low grazing angles vs range. The RCS is calculated for the array vertical, and tilted 3.38 degrees and 15 degrees from vertical. The results are compared with the RCS that would have been seen in free space. Graphs of the specular reflection coefficient vs sea wave height for 3, 10, and 35 GHz, with grazing angles as parameter, are included. A method to calculate the free space RCS of a target if the radar response vs range is known in a multipath environment is described. If the reflector has a rough surface (maximum peaks >/- lambda/4) for the geometry considered, the RCS for full multipath is fairly constant for ranges above 1 km, and 5 to 10 dB above the RCS without multipath, i.e., free space.
Book Synopsis Principles of Modern Radar by : Jerry Eaves
Download or read book Principles of Modern Radar written by Jerry Eaves and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, Principles of Modern Radar, has as its genesis a Georgia Tech short course of the same title. This short course has been presented an nually at Georgia Tech since 1969, and a very comprehensive set of course notes has evolved during that seventeen year period. The 1986 edition of these notes ran to 22 chapters, and all of the authors involved, except Mr. Barrett, were full time members of the Georgia Tech research faculty. After considerable encouragement from various persons at the university and within the radar community, we undertook the task of editing the course notes for formal publication. The contents of the book that ensued tend to be practical in nature, since each contributing author is a practicing engineer or scientist and each was selected to write on a topic embraced by his area(s) of expertise. Prime examples are Chaps. 2, 5, and 10, which were authored by E. F. Knott, G. W. Ewell, and N. C. Currie, respectively. Each of these three researchers is rec ognized in the radar community as an expert in the technical area that his chap ter addresses, and each had already authored and published a major book on his subject. Several other contributing authors, including Dr. Bodnar, Mr. Bruder, Mr. Corriher, Dr. Reedy, Dr. Trebits, and Mr. Scheer, also have major book publications to their credit.
Book Synopsis Measurement of Sea and Ice Backscatter Reflectivity Using an OTH Radar System by : William F. Ring
Download or read book Measurement of Sea and Ice Backscatter Reflectivity Using an OTH Radar System written by William F. Ring and published by . This book was released on 1982 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is essential, during the operation of an OTHradar system designed for the detection of small targets (aircraft or cruise missiles), that the operators be able to estimate the system sensitivity in real time without targets present. In geographical areas under surveillance that are remote and inaccessible, this technique involves measuring the ratio of the signal returned from the 'ground' to the noise signal. Data from Polar Fox II experimental OTH-radar system was analyzed in order to determine the intrinsic backscatter reflectivity from open ocean, sea ice, and the Greenland ice cap. (Author).
Book Synopsis Optimal and Suboptimal Radar Detection of Targets from High Grazing Angles and in High Resolution Sea Clutter by : Graham V. Weinberg
Download or read book Optimal and Suboptimal Radar Detection of Targets from High Grazing Angles and in High Resolution Sea Clutter written by Graham V. Weinberg and published by . This book was released on 2010 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Radar at Sea by : Francis James Wylie
Download or read book The Use of Radar at Sea written by Francis James Wylie and published by . This book was released on 1968 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Computational Tools for Predicting the Radar Scattering from Targets on a Rough Sea Surface by :
Download or read book Development of Computational Tools for Predicting the Radar Scattering from Targets on a Rough Sea Surface written by and published by . This book was released on 2001 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The radar scattering from 2D and 3D targets on a rough sea surface is investigated using computational techniques developed specifically for this problem. Numerical simulations and Monte Carlo studies yield insight into the scatter phenomenology. It is found that the scattering from a target on a random rough sea surface becomes more coherent as the incident field becomes more coherent, ie, for low wind speeds or low elevation angles. For the less coherent case, the average. and peak scattering levels of a target on a rough surface may be significantly higher or lower than for a flat surface, depending on the target geometry. A tilted plan model is proposed for predicting the variations in the RCS of a target on a rough sea surface by mounting the target on a locally planar surface which can tilt, similar to the two-scale composite model of ocean scattering. It is found that tilting the plane, or equivalent, rolling the target on a horizontal plane fields as much or more variation in the RCS than caused by the rough surface. However, the cross polarization introduced by the rough surface in 3D is not well predicted by the tilted plane model, nor is the unexplained behavior near the Brewster angle for vertical polarization.
Book Synopsis Detection of Stationary Targets in Sea Clutter Using a CW Dual-Frequency Radar by : William J. Plant
Download or read book Detection of Stationary Targets in Sea Clutter Using a CW Dual-Frequency Radar written by William J. Plant and published by . This book was released on 1975 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coherent, CW, X-band, dual-frequency radar has been used to detect stationary targets in the Chesapeake Bay. It is shown that by multiplying returns at two frequencies and averaging, sea clutter is suppressed. If the decorrelation of the two clutter returns is greater than that of returns from a stationary target, the signal-to-clutter ratio of the two-frequency system is shown to be greater than that of a comparable single-frequency radar. (Author).
Book Synopsis The Use of Radar at Sea by : Francis James Wylie
Download or read book The Use of Radar at Sea written by Francis James Wylie and published by US Naval Institute Press. This book was released on 1978 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
