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.

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.

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:

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.

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.

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:

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.

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.

Download or read book Radar and ARPA Manual written by Alan G. Bole and published by Butterworth-Heinemann. This book was released on 2013-11-20 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fully revised new edition covers the complete radar/ARPA installation and serves as the most comprehensive and up-to-date reference on equipment and techniques for radar observers using older and newer systems alike. Suitable for use as a professional reference or as a training text, the book covers all aspects of radar, ARPA and integrated bridge systems technology (including AIS, ECDIS and GNSS) and their role in shipboard operations. It is a valuable resource for larger vessels and also covers the needs of leisure and amateur sailors for whom this technology is now accessible. Radar and ARPA Manual provides essential information for professional mariners, including those on training courses for electronic navigation systems and professional certificates internationally. Reference is made throughout to IMO (International Maritime Organization) Performance Standards, the role of radar in navigation and in collision avoidance, and to international professional and amateur marine operations qualifications. The most up-to-date book available, with comprehensive treatment of modern radar and ARPA systems and ECDIS (Electronic Chart Display & Information Systems) Full coverage of IMO performance standards relating to radar and navigational technology on new and established vessels Covers best practice use of equipment as well as underlying principles, with essential mathematics and complicated concepts illustrated through the use of clear illustrations

Download or read book Radar Imaging for Maritime Observation written by Fabrizio Berizzi and published by CRC Press. This book was released on 2018-01-24 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the experiences of the Department of Information Engineering of the University of Pisa and the Radar and Surveillance System (RaSS) national laboratory of the National Interuniversity Consortium of Telecommunication (CNIT), Radar Imaging for Maritime Observation presents the most recent results in radar imaging for maritime observation. The book explores both the areas of sea surface remote sensing and maritime surveillance providing key theoretical concepts of SAR and ISAR imaging and more advanced and ad-hoc techniques for applications in maritime scenarios. The book is organized in two sections. The first section discusses the fundamentals of standard SAR/ISAR processing and novel imaging techniques, such as Bistatic, Passive, and, 3D Interferometric ISAR. The second section focuses on the applications and results obtained by processing real data from maritime observations like SAR image processing for oil spill, detection in SAR images and fractal analysis. Useful to both beginners and experts in maritime observation, this book provides several examples of (mainly space-borne) radar imaging of maritime targets. Nevertheless, the same principles and techniques apply to the case of manned or unmanned carriers and to ground and air moving targets.

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.

Download or read book Radar and ARPA Manual written by Alan G. Bole and published by Elsevier. This book was released on 2005-04-21 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar and ARPA (Automatic Radar Plotting Aids) are standard systems on all commercial vessels and are widely used in the leisure maritime sector. This fully revised new edition covers the complete radar/ARPA installation, including AIS (Automatic Identification System) and ECDIS (Electronic Chart Display & Information Systems). It serves as the most comprehensive and up-to-date reference on equipment and techniques for radar observers using older and newer systems alike. Suitable for use both as a professional user's reference and as a training text, it covers all aspects of radar and ARPA technology, its use and its role in shipboard operations. Reference is made throughout to IMO (International Maritime Organisation) Performance Standards, the role of radar in navigation and in collision avoidance, and to international professional and amateur marine operations qualifications. * The most up-to-date book available, with full coverage of modern radar and ARPA systems, integrated electronic bridge systems and the 2004 IMO Radar regulations* The industry authority text, widely-used* Meets professional, educational and leisure maritime needs, covering both professional and amateur certificate requirements

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:

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.

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).

Download or read book Air and Spaceborne Radar Systems written by Philippe Lacomme and published by William Andrew. This book was released on 2001 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intended for actual users of radar, the book focuses on the history, main principles, functions, modes, properties and specific nature of modern airborne radar. It examines radar's role within the system when carrying out its assigned missions, showing the possibilities of radar, it's limitations and a discussion of how radar may evolve in the future.

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: