Download or read book Development of Code for a Physical Optics Radar Cross Section Prediction and Analysis Application written by Filippos Chatzigeorgiadis and published by . This book was released on 2004-09-01 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: The significance of the Radar Cross Section (RCS) in the outcome of military engagements makes its prediction an important problem in modern Electronic Warfare. The POFACETS program, previously developed at the Naval Postgraduate School (NPS), uses the Physical Optics method to predict the RCS of complex targets, which are modeled with the use of triangular facets. The program has minimum computer resource requirements and provides convenient run- times. This thesis up-graded, enhanced and expanded the functionalities and capabilities of the POFACETS program. The new functionalities were implemented by upgrading the Graphical User Interface and model database, allowing the creation of models with an unlimited number of facets, providing capabilities for the automatic creation of models with standard geometric shapes, allowing the combination of existing target models, providing capabilities for sharing target models with commercial CAD programs, and creating new display formats for RCS results. The new computational capabilities include the development of a user-updateable database of materials and coating that can be applied to models in one or multiple layers, and the computation of their effects on the models' RCS. Also implemented are the computations of the ground's effect on the RCS, and the exploitation of symmetry planes in models, in order to decrease run-time for RCS prediction.
Download or read book Graphical User Interface for a Physical Optics Radar Cross Section Prediction Code written by Elmo E. Garrido and published by . This book was released on 2000-09-01 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: This implementation of the physical optics approximation method for predicting the radar cross section (RCS) of complex objects utilizes the scientific computational features of MATLAB and its Graphical User Interface (Gui) functions to provide an error-free encoding of input parameters and efficient calculation. The POFACETS GUI provides a convenient tool for both students and electromagnetic professionals to design complex models by representing its component parts as triangular facets and offers options for defining the surface roughness of the scattering object. The GUI calculates the monostatic or bistatic radar cross section of the modeled object based on certain radar frequencies and parameters of interest, creates a variety of plots for the model geometry and its RCS measurement, and provides additional functionalities to enhance visualization of the object and check for accuracy of data. Various help windows and messages are available to the user to serve as guide in the efficient use of the GUI. The simplicity of the GUI design does not require the user to have a detailed understanding of the various steps involved in the RCS calculation.
Download or read book The Micro Doppler Effect in Radar Second Edition written by Victor C. Chen and published by Artech House. This book was released on 2019-02-28 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a prominent expert in the field, this updated and expanded second edition of an Artech House classic includes the most recent breakthroughs in vital sign and gender recognition via micro-radar, as well as covering basic principles of Doppler effect and micro-Doppler effect and describing basic applications of micro-Doppler signatures in radar. The book presents detailed procedures about how to generate and analyze micro-Doppler signatures from radar signals. Readers will learn how to model and animate an object (such as human, spinning top, rotating rotor blades) with movement, simulation of radar returns from the object, and generating micro-Doppler signature. The book includes coverage of the Google project “Soli”, which demonstrated the use of radar micro-Doppler effect to sense and recognize micro motions of human hand gesture for controlling devices. It also discusses noncontact detection of human vital sign (micro motions of breathing and heart beating) using radar, another important application of radar micro-Doppler sensors. Detailed MATLAB source codes for simulation of radar backscattering from targets with various motions are provided, along with source codes for generating micro-Doppler signatures and analyzing characteristics of targets.
Download or read book The Micro doppler Effect in Radar written by Victor C. Chen and published by Artech House. This book was released on 2011 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Doppler Effect can be thought of as the change in frequency of a wave for an observer moving relative to the source of the wave. In radar, it is used to measure the velocity of detected objects. This highly practical resource provides thorough working knowledge of the micro-Doppler effect in radar, including its principles, applications and implementation with MATLAB codes. The book presents code for simulating radar backscattering from targets with various motions, generating micro-Doppler signatures, and analyzing the characteristics of targets. In this title, professionals will find detailed descriptions of the physics and mathematics of the Doppler and micro-Doppler effect. The book provides a wide range of clear examples, including an oscillating pendulum, a spinning and precession heavy top, rotating rotor blades of a helicopter, rotating wind-turbine blades, a person walking with swinging arms and legs, a flying bird, and movements of quadruped animals.
Download or read book Methods of Radar Cross section Analysis written by J.W. Jr. Crispin and published by Elsevier. This book was released on 2013-06-11 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods of Radar Cross-section Analysis
Download or read book Radar Signature Analysis and Prediction by Physical Optics and Ray Tracing written by M.G.E. Brand and published by . This book was released on 1996 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surveillance in Action written by Panagiotis Karampelas and published by Springer. This book was released on 2017-11-14 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses surveillance in action-related applications, and presents novel research on military, civil and cyber surveillance from an international team of experts. The first part of the book, Surveillance of Human Features, reviews surveillance systems that use biometric technologies. It discusses various novel approaches to areas including gait recognition, face-based physiology-assisted recognition, face recognition in the visible and infrared bands, and cross-spectral iris recognition. The second part of the book, Surveillance for Security and Defense, discusses the ethical issues raised by the use of surveillance systems in the name of combatting terrorism and ensuring security. It presents different generations of satellite surveillance systems and discusses the requirements for real-time satellite surveillance in military contexts. In addition, it explores the new standards of surveillance using unmanned air vehicles and drones, proposes surveillance techniques for detecting stealth aircrafts and drones, and highlights key techniques for maritime border surveillance, bio-warfare and bio-terrorism detection. The last part of the book, Cyber Surveillance, provides a review of data hiding techniques that are used to hinder electronic surveillance. It subsequently presents methods for collecting and analyzing information from social media sites and discusses techniques for detecting internal and external threats posed by various individuals (such as spammers, cyber-criminals, suspicious users or extremists in general). The book concludes by examining how high-performance computing environments can be exploited by malicious users, and what surveillance methods need to be put in place to protect these valuable infrastructures. The book is primarily intended for military and law enforcement personnel who use surveillance-related technologies, as well as researchers, Master’s and Ph.D. students who are interested in learning about the latest advances in military, civilian and cyber surveillance.
Download or read book Aspects of Radar Cross Section Calculation for Targets of Complex Structure written by O. Weiland and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Minimizing the Radar Cross Section (RCS) of a new warship, it is important to determine the expected RCS in the phase of design because of high development costs. Furthermore it is desirable to identify design dependent scattering centers and analyse their mode of action. This is probably done most effectively by a graphical representation of the scattering mechanisms on a 3- dimensional drawing of the target itself. The paper summarizes the development of a computer code that combines graphical representation methods with well established theoretical techniques to predict the RCS for targets of complex structure. The tool is based on physical optics, physical theory of diffraction, ray tracing and it accounts for multiple shadowing and scattering up to triple bounce. The method of component technique using primitives is applicable to electrically large bodies and the calculation is limited to the monostatic case for perfectly conducting surfaces. Object coherence is used to reduce computation time during the solution of the hidden surface problem.
Download or read book Radar cross section prediction using ray casting geometrical optics and physical optics written by O. Zeypveld and published by . This book was released on 2004 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Mechanics written by Aleksander N. Guz and published by Springer Nature. This book was released on 2023-10-03 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers research from modern directions in solid mechanics, in particular, in the fields of mechanics of composite materials, fracture mechanics, strength of materials and structures, thermo-viscoelasticity and plasticity, mechanics of shell structures, contact mechanics, theory of wave propagation, dynamics of mechanical and hydromechanical systems. The book presents some new results in the main research directions in mechanics on which the institutions of the National Academy of Sciences of Ukraine are focused. In addition to these studies, the results of joint scientific projects of the academic institutions with universities and research institutions of Ukraine are presented. The work is dedicated to the 145th anniversary of Stepan Prokopovich Timoshenko, the world-famous scientist in the field of mechanics, the founder of the Institute of Mechanics of the National Academy of Sciences of Ukraine, one of the founders of the National Academy of Sciences of Ukraine and academic teacher with world-wide reputation with great influence on engineering education.
Download or read book Radar and Laser Cross Section Engineering written by David C. Jenn and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2005 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: There have been many new developments in the ten years since the first edition of Radar and Laser Cross Section Engineering was published. Stealth technology is now an important consideration in the design of all types of platforms. The second edition includes a more extensive introduction that covers the important aspects of stealth technology and the unique tradeoffs involved in stealth design. Prediction, reduction, and measurement of electromagnetic scattering from complex three-dimensional targets remains the primary emphasis of this text, developed by the author from courses taught at the Naval Postgraduate School. New topics on computational methods like the finite element method and the finite integration technique are covered, as well as new areas in the application of radar absorbing material and artificial metamaterials. Matlab [registered] software, homework problems, and a solution manual (available to instructors) supplement the text. Written as an instructional text, this book is recommended for upper-level undergraduate and graduate students. introduction to the physics and mathematics of radar cross section in order to better understand the interdisciplinary aspects of stealth. Matlab is a registered trademark of The MathWorks, Inc.
Download or read book Radar Cross Section Analysis and Control written by Asoke K. Bhattacharyya and published by Artech House Radar Library (Ha. This book was released on 1991 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference describes techniques for controlling the RCS of targets, provides analytical methods for estimating RCS, develops models for the design of low RCS targets and antennas, and discusses several RCS enhancement techniques.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Radar Cross Sections of Complex Objects written by W. Ross Stone and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1990 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Computational Electromagnetic Methods for the Prediction of Radar Cross Section written by Ulice J. Macias and published by . This book was released on 1986 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effectiveness of the various Radar Cross Section (RCS) prediction techniques was investigated. The RCS of square flat plates was analyzed using the Physical Optics approximation, the Physical Theory of Diffraction, the Geometrical Theory of Diffraction, the Uniform Theory of Diffraction, and the Moment Method or Method of Moments. The RCS predicted by the computational methods was compared to measurements performed in an anechoic RCS membership chamber. Also, the five computational methods were compared to each other in terms of plate size (in wavelengths), computer (CPU) time required for computational integrity. It was found that although the Moment Method is the most accurate RCS prediction method, it takes to much CPU time for large plates (over 2.5 wavelengths). The Uniform Theory of Diffraction, on the other hand, is accurate for large plates and takes less CPU time than the Moment Method. The Geometric Theory of Diffraction is also accurate but fails near the edge of the plate. Finally, the Physical Theory of Diffraction and the Physical Optics approximation are relatively inaccurate.
Download or read book Radar Cross Section Handbook written by George T. Ruck and published by . This book was released on 1970 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Cross Section Lectures written by Allen E. Fuhs and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1984 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive graphs and notes, prepared with the designer in mind, provide insight into scattering of electromagnetic waves by various objects. Includes appropriate equations and sample calculations.
