Download or read book Foliage Penetration Radar written by Mark E. Davis and published by IET. This book was released on 2011-06-30 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers all aspects of foliage penetration (FOPEN) radar for both airborne military systems and earth resource mapping. It is the first book to be published on the subject.
Download or read book Evaluation of the Multipurpose Foliage Penetration Radar M FOPEN in Hawaii written by and published by . This book was released on 1974 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes the implementation, procedure, and results of the Multipurpose Foliage Penetration Radar (M-FOPEN) conducted by the 25th Infantry Division. Maximum ranges of detection were determined for the M-FOPEN operating in various types of terrain and foliage, and probability of detection calculated for each range, target, and foliage combination. These tests demonstrated the capability of the M-FOPEN to penetrate up to 700 meters of foliage and detect moving targets, with a negligible false alarm rate. A tactical exercise was conducted during which the M-FOPEN and the standard AN/ PPS-5 Ground Surveillance Radars were deployed and the detection performance and false alarm rates of each compared. Detection experiments were performed with the M-FOPEN using a helicopter (AH-1G) as the target to determine the doppler signature of the aircraft. These demonstrated that a unique doppler signature does exist for helicopters and the helicopters are detectable using the M-FOPEN even though the path between the radar and the aircraft is blocked by foliage.
Download or read book Foliage Penetration Radar Study written by William Perry Wheless and published by . This book was released on 1989 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foliage Penetration Radar History and Developed Technology written by and published by . This book was released on 1974 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report documents the USA Land Warfare Laboratory's Foliage Penetration Radar program including the historical aspects, the technology developed and four resulting systems that saw combat in Southeast Asia. Application of the FOPEN technology to intrusion detection systems, airborne FOPEN radars, swimmer detection systems, and a radar capable of detecting low flying aircraft concealed by foliage are presented. A review of signal processing techniques and tradeoffs for ground surveillance radars and a summary of propagation research concludes the report.
Download or read book Foliage Penetration FOPEN Radar Detection of Low Flying Aircraft written by and published by . This book was released on 1974 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes detection experiments performed with the Foliage Penetration (FOPEN) Radar operating at 140 MHz in which the target was a helicopter flying nap-of-the-earth (NOE). Preliminary experiments performed in Hawaii during the user evaluation of the FOPEN system demonstrated the ability of this radar to detect helicopters flying NOE using foliage and terrain for cover. A series of experiments at Aberdeen Proving Ground were made to establish the detection ranges through foliage for a single UH-1 helicopter. Additional measurements of the radar cross section of the UH-1 on the ground were taken using the LWL Airborne Foliage Penetration Radar, and are also reported. The report concludes with a theoretical analysis of the propagation losses affecting the detection of aircraft flying NOE by radars operating at frequencies of from 100 to 10,000 MHz.
Download or read book Design and Performance of an Ultra wideband Foliage Penetration Noise Radar written by Joseph A. Henning and published by . This book was released on 2001 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Antenna for Combined Surveillance and Foliage Penetration Radar COMSFOR written by and published by . This book was released on 1976 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: An antenna has been designed for the Combined Surveillance and Foliage Penetration Radar (COMSFOR) project. The antenna provides an existing X- band surveillance radar with a moderate foliage penetration capability. The foliage penetration antenna is an array of L-band, stripline dipole/director elements placed in front of an X-band aperture. A description of the dual- frequency antenna is given along with the measured RF performance at both frequency bands. A separate L-band corner reflector antenna design which can be mounted on a lightweight telescoping mast is also described. The antenna has demonstrated excellent gain and pattern characteristics for its size.
Download or read book Modeling and ATR for Foliage and Ground Penetrating Radar written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project has involved both numerical simulation of electromagnetic scattering and the associated signal processing for ultra-widenband synthetic aperture radar (SAR) for foliage and ground penetrating radar (FOPEN and GPEN, respectively). With regard to the modeling, we have developed a fast multipole method (FMM) model for electromagnetic scattering from electrically large conducting targets in the presence of a half space, with application to scattering from surface/subsurface unexploded ordnance (UXO), as well as for scattering from surface vehicles, such as tanks. The FMM simulator is significantly faster than conventional method of moments (MoM) solvers. allowing solution of problems that were heretofore intractable. The code has been delivered to the Army Research Laboratory (ARL), and successfully compared with data measured by ARL. In addition to this modeling, we have developed hidden Markov model (HMM) automatic target recognition algorithms, applicable to the SAR detection and discrimination of concealed targets. Within the context of the HMM, we have employed a physics based matching pursuits feature parser. This signal processing paradigm has been successfully applied to ARL measured FOPEN and GPEN data.
Download or read book Radar Foliage Penetration Measurements at Millimeter Wavelengths written by and published by . This book was released on 1975 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of radar measurements on the penetration of foliage has been made at 9.4, 16.2, 35, and 95 GHz. Measurements were made for both the one-way and two-way cases at 9.4 and 16.4 GHz at similar foliage areas for comparison. Most of the measurements were made at depression angles below 3 degrees, although a set of one-way measurements was made at 9.4 and 16.2 GHz for a depression angle of 29 degrees. Attenuation properties, polarization ratios, and noncoherent spectral correlation properties were investigated as a function of frequency, polarization, depth of foliage and wind speed. Limited comparisons are made with data previously available at lower frequencies.
Download or read book Radio Frequency Interference Suppression for Foliage Penetrating Radar Imaging written by Timothy R. Miller and published by . This book was released on 1994 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meter Wave Synthetic Aperture Radar for Concealed Object Detection written by Hans Hellsten and published by Artech House. This book was released on 2017-05-31 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique resource presents the principles of meter wave ground imaging radar focusing on foliage penetration. Scattering of VHF/UHF radar signals are presented including the basic laws of electromagnetism, homogeneous media, media discontinuities/non-flat media discontinuities, and ground reflectivity. The book introduces meter wavelength synthetic aperture radar, bandwidth, and SAR imaging principles, including moving objects and also compares collected SAR data. Meter wavelength SAR system design and processing is explored, highlighting low frequency SAR design aspects, characterization of additive noise, antenna system basics, waveforms and emission adaptation which is critical material to the advancement in sensors and signal processing for below ground imaging by the energy industry and governments worldwide. The FFBP method of processing, explicit treatment of base 2 FFBP is explained along with motion errors sensitivity and motion estimation methods. The book also explains the Bayesian change detection, covariance moving target extraction and polarimetric subsurface imaging.
Download or read book Ultra wideband Radar Technology written by James D. Taylor and published by CRC Press. This book was released on 2018-10-03 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1995, James D. Taylor's Introduction to Ultra-Wideband Radar Systems introduced engineers to the theory behind a promising new concept for remote sensing. Since then, the field has undergone enormous growth with new applications realized and more applications conceptualized at a remarkable pace. However, understanding ultra-wideband (UWB) radar requires a new philosophical approach. Concepts such as radar cross section will have new meanings as range resolution becomes smaller than the target. Ultra-Wideband Radar Technology is a guide to the future of radar by an international team of experts. They present the problems, solutions, and examples of UWB radar remote sensing. Chapters discuss the theory and ideas for future systems development, and show the potential capabilities. The writers present concepts such as the differences between UWB and conventional radars, improving over-resolved target detection, receivers and waveforms, micropower systems, high power switching, and bistatic radar polarimetry. Finding comparable information elsewhere might require consulting hundreds of other books, technical journals, and symposium proceedings. Ultra-Wideband Radar Technology offers a unique opportunity to explore the theory, applications, and technology of UWB radar within a single source.
Download or read book Feasibility Study for Enhanced CC 130 Search and Rescue Capability With a Ground Penetrating Radar written by and published by . This book was released on 2004 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Penetration radars have been successful in detecting and locating many types of metallic targets under foliage, including flat plates, vehicles, reflectors, and pipes. The purpose of this study is two-fold: (1) define the radar operating parameters, especially frequency, that would maximise the chances of success for a penetration radar mounted on the CC-130 for detection of downed aircraft in search and rescue operations; and (2) investigate the feasibility of mounting a foliage penetration radar on the CC-130 RMAS. The study concludes that the penetration radar can be operated from the CC-130 RMAS pallet and associated pod using a frequency range which will effective in detecting concealed sections of downed aircraft. The minimum size of detected metal parts will depend mostly on the background clutter in the radar image. In many scenes this will most likely be due not to snow or forest properties, but to surface rockfall in the area which itself has also been covered by foliage or snow. Pieces of metal two or more meters across will be readily detectable from a wide range of illumination angles. Snow cover is not an impediment to radar detection in this frequency range, or indeed for any frequencies, even beyond L-Band.
Download or read book A Foliage Penetration Summary written by August Golden and published by . This book was released on 1978 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief survey of existing data on foliage attenuation of RF energy is presented. It is shown that most researchers have concluded from this data that RF energy is attenuated more rapidly in foliage at higher frequencies. Also, signal reflections from the foliage/air interface are shown to be a significant loss mechanism that is relatively frequency independent. Finally, curves for predicting RF signal reflection from and attenuation within foliage are presented.
Download or read book Ground Penetrating Radar written by David J. Daniels and published by IET. This book was released on 2004-08-20 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the key elements of the subject of surface penetrating radar, and in general terms the inter-relationship between those topics in electromagnetism, soil science, geophysics and signal processing which form part of its design.
Download or read book Ultrawideband Radar written by James D. Taylor and published by CRC Press. This book was released on 2017-12-19 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a practical review of the latest technology in the field, Ultrawideband Radar Applications and Design presents cutting-edge advances in theory, design, and practical applications of ultrawideband (UWB) radar. This book features contributions from an international team of experts to help readers learn about a wide range of UWB topics, including: History of the technology American and European governmental regulations and key definitions Nonsinusoidal wave propagation theory Random signal radar Object detection by ground permittivity measurements Large-target backscattering effects Medical applications Large current radiator antenna design Materials-penetrating theory Radar signal processing Weak-signal detection methods Holographic and real time radar imaging This book’s contributors use practical information to illustrate the latest theoretical developments and demonstrate UWB radar principles through case studies. Radar system engineers will find ideas for precision electronic sensing systems for use in medical, security, industrial, construction, and geophysical applications, as well as those used in archeological, forensic and transportation operations.
Download or read book Radar Foundations for Imaging and Advanced Concepts written by Roger Sullivan and published by SciTech. This book was released on 2004 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through courses internally taught at IDA, Dr. Roger Sullivan has devised a book that brings readers fully up to speed on the most essential quantitave aspects of general radar in order to introduce study of the most exciting and relevant applications to radar imaging and advanced concepts: Synthetic Aperture Radar (4 chapters), Space-time Adaptive Processing, moving target indication (MTI), bistatic radar, low probability of intercept (LPI) radar, weather radar, and ground-penetrating radar. Whether you're a radar novice or experienced professional, this is an essential reference that features the theory and practical application of formulas you use in radar design every day. With this book, you're taken step-by-step through the development of modern airborne microwave radar, up to the cutting edge of emergent technologies, including new results on theoretical 2D and 3D ISAR point-spread functions (PSF) and current discussions concerning dechirp/deskew SAR processing, layover in SAR images, vibrating targets, foliage penetration, image quality parameters, and more. Plus, for students of electrical engineering, physics, and radar, this book provides the best source for basic airborne radar understanding, as well as a broad introduction to the field of radar imaging.
