Studies have been conducted on countermeasures susceptibility and on the effects of mutual interference (MI) for two surface ship sonar systems. Generally, the methods used to determine the effects of interference, whether countermeasures of mutual interference, are one or a combination of the following: (1) mathematical analysis, (2) computer simulation, and (3) psychophysical experimentation. Efforts have included such sonars as the AN/ SQQ-23 (PAIR), the AN/SQS-26 AX, BX and CX, and the...
Topics: DTIC Archive, TRACOR INC AUSTIN TX, *SEARCH SONAR, *ACOUSTIC COUNTERMEASURES, VULNERABILITY,...
Global Positioning System Receivers can be affected by interference from unfriendly jammers. The ANSAS Automatic Null Steering/Surveillance array System for Global Positioning System (GPS) application is an ECM addition for GPS application which reduces GPS performance degradation by generating a spatial null in the antenna pattern in the direction of the interference source. Both automatic and manual modes of operation are available to the operator. ANSAS operates by sensing the interference...
Topics: DTIC Archive, Gray, Jack, ARMY AVIATION RESEARCH AND DEVELOPMENT COMMAND ST LOUIS MO, *GLOBAL...
Electronic countermeasures (ECM) and Electronic Counter-Counter Measures (ECCM) is a basic introductory course into the techniques used to counter radar and electro-optical equipment. This course begins with an introduction to electronic warfare and jamming techniques, and ends with discussions on countering those jamming techniques. This course builds on the material presented in the Radar and the Electro-Optics Courses.
Topics: DTIC Archive, AIR FORCE TEST PILOT SCHOOL EDWARDS AFB CA, *ELECTRONIC COUNTER COUNTERMEASURES,...
To be the victor in combat an air defense system must know the EW environment around it well. We need the expert system technology for analysis and description of EW environment around the air defense system because the EW environment is complex and more changeable. According to all jamming information in the air acquired from the EW environment reconnaissance system fixed near command center of the air defense system especially, the several radars in the air defense system, C3I and so on. We...
Topics: DTIC Archive, Benren, Tao, NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH, *AIR DEFENSE,...
The theory of the acousto-optical interaction has been investigated in many papers. In this paper, the fundamental theory is used to develop a basic theory that explains the signal processing capabilities of Bragg cell devices. Examples of devices for frequency estimation, correlation, and Fourier transformation are presented. (Author)
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
The system analyzed for bit error rate (BER) performance is frequency-hopped (FH) multiple frequency-shift-keying (MFSK) wherein the M symbol frequency assignments are independently and randomly chosen on each hop, and the information transmission is repeated L times (L-hop diversity) for a soft symbol decision. This FH/RMFSK system is intended to counter systematic follow-on jamming. The reported analysis is of the system's BER in worst-case partial-band noise jamming (WCPBNJ). To be...
Topics: DTIC Archive, Miller, L E, LEE (J S) ASSOCIATES INC ARLINGTON VA, *ELECTRONIC COUNTER...
The problem addressed in this memorandum is nonstationary interference suppression in noise radar systems. Towards this aim, linear time-frequency (TF) transforms, short time Fourier transform (STFT) and local polynomial Fourier transform (LPFT) are used as a means of signal representation. The noise radar return signal is a wideband random signal occupying the whole TF plane, while the interference signal is well concentrated in the TF plane. This implies that the filtering of the received...
Topics: DTIC Archive, Thayaparan, T, DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO), *FOURIER...
This document is a supplementary text to the electronic warfare (EW) short courses, EW-101 and EW-102, which are taught annually at the Naval Air Warfare Center Weapons Division (NAWCWD), Point Mugu, California. Like the EW courses, this material is intended for a general audience without an infrared (IR) background who is looking for a practical overview of the field directed toward the problems of aircraft defense. The object is to convey the key concepts primarily through drawings and...
Topics: DTIC Archive, NAVAL AIR WARFARE CENTER WEAPONS DIV CHINA LAKE CA, *ELECTRONIC WARFARE, AIRCRAFT,...
The basic simulation philosophy of the Advanced Simulation Center (ASC) is to incorporate as much missile hardware as possible into simulation. Errors associated with modeling nonlinear devices are thus avoided while increasing credibility of the simulation. However, this places a special burden on the simulators to display a realsitic and comprehensive environment during the simulations because the seekers are stimulated at their operating wavelengths. The seeker is the more difficult...
Topics: DTIC Archive, Belrose,F M, ARMY MISSILE RESEARCH AND DEVELOPMENT COMMAND REDSTONE ARSENAL AL...
This thesis investigates the performance degradation resulting from multitone interference of orthogonal, noncoherent, frequency-hopped, M-ary frequency-shift keyed receivers (FH/MFSK) where the effect of thermal and other wideband noise is not neglected. The multiple, equal power jamming tones are assumed to correspond to some or all of the possible FH M-ary orthogonal signaling tones. Furthermore, the channel is modeled as a Ricean fading channel, a possibility precluded when thermal noise is...
Topics: DTIC Archive, Katsoulis, George T., NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *ELECTRONIC COUNTER...
The Communication Systems Evaluation Laboratory (CSEL), located at the Air Force Avionics Laboratory, is a real-time satellite simulation facility. This report investigates the application of CSEL to the LES 8/9 and GPS satellite programs. In addition, a new analysis of the effects of soft and hard limiters on frequency-hopped signals is presented.
Topics: DTIC Archive, Ehrman, Leonard, Parl, Steen, Pierce, John N., Richman, Steven H., SIGNATRON INC...
Near field blockage of an ultra low sidelobe antenna (ULSA) by several frequently encountered obstacles is studied both experimentally and analytically to determine how the radiation characteristics of the antenna are affected. The results are generalized over a wide range of obstacle sizes and distances for aperture illuminations ranging from conventional reflector-type distributions to ultra low sidelobe distributions. These results demonstrate that the superior ECCM characteristics of the...
Topics: DTIC Archive, Winchell,Stephen G, WESTINGHOUSE DEFENSE AND ELECTRONIC SYSTEMS CENTER BALTIMORE MD...
Whatever the ultimate purpose of an interception system is, it nearly always must achieve the three basic functions of detection, frequency estimation, and direction finding. The fundamental concepts and issues of these three elements of interception are presented at the systems level, assuming that little is known about the signals to be intercepted. The capabilities of radiometers and cross correlators for detection are determined. Channelized, discrete Fourier transform, acousto-optical,...
Topics: DTIC Archive, Torrieri, Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
This report describes a test facility for measuring the behaviour and quality of radio communication equipment in a simulated operational environment. The work as described in this report was performed in the scope of the assignment ECCM jammer suppression (A89KL641). The testbed allows to select the simulated propagation characteristics, such as attenuation, fading and the occurrence of multipath effects. Besides it is possible to insert various jamming signals. The criterion for classifying...
Topics: DTIC Archive, Feenstra, P, FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS), *TEST AND...
This Guide to Army Smart Weapon Testing Issues is a primer intended primarily for the developmental engineers in the smart weapon program management offices who are responsible for organizing smart weapon development tests. Much of the information in this guide is also relevant to the ground vehicle developer. The document examines a number of issues, suggestions, and general principles relevant to smart weapons. The information contained is based primarily on numerous interviews with...
Topics: DTIC Archive, Otto, Jim, TACTICAL WEAPONS GUIDANCE AND CONTROL INFORMATION ANALYSIS CENTER CHICAGO...
Thesis advisor, R. Clark Robertson
Topics: ELECTRONIC COUNTER COUNTERMEASURES, INTERFERENCE, FADING (ELECTROMAGNETIC WAVES)
Source: half
The basic principles of adaptive antenna systems are reviewed. Special attention is given to the sidelobe canceller--the prototype and classic example of adaptive antenna systems. The operation of the sidelobe canceller is interpreted in terms of noise cancelling and adaptive null steering. The classical theory of adaptive elements is developed. Tapped-delay-line and frequency-domain array-processing filters are discussed. The signal-to-noise ratio and the mean-square-error performance criteria...
Topics: DTIC Archive, Torrieri, Don J., ARMY MATERIEL DEVELOPMENT AND READINESSCOMMAND ADELPHI MD...
The theory of the acousto-optical interaction has been investigated in many papers. In this paper, the fundamental theory is used to develop a basic theory that explains the signal processing capabilities of Bragg cell devices. Examples of devices for frequency estimation, correlation, and Fourier transformation are presented. (Author)
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
Polarization serves as a discrimant between radar targets and surrounding chaff and clutter. A dual channel system is required to utilize polarization information which exists in the target scattering matrix. Several methods are presented for designing an optimum polarization codes transmit waveform and matched coherent receiver based on target and clutter statistics. Simulation results for various target models against chaff show a significant increase in detectability for the two-channel...
Topics: DTIC Archive, Klein, Albert, ITT GILFILLAN VAN NUYS CA, *POLARIZATION, *TARGET DISCRIMINATION,...
The Phase I in-house effort to develop an optical processor as an electronic counter-counter-measure for radar multipath is discussed. The closed loop system demonstrates the ability to achieve a 15.2+/-2.4 dB adaptive cancellation of a single tone, single delay jamming signal over a 1-5 MHz bandwidth. The open loop optical system proves capable of providing a 30.2+/-3.9 dB cancellation of the same signal when using operator provided information. Key elements of this project include the...
Topics: DTIC Archive, Ward, Michael J, ROME LAB ROME NY, *COMPUTER PROGRAMS, OPTICAL EQUIPMENT, TEST BEDS,...
Textbook for use in teaching test and evaluation of electronic warfare systems including theory of operation, operating characteristics, and test methodology. Topics include electronic reconnaissance, electronic countermeasures, electronic counter-countermeasures, electronic warfare system parameters, and test methods.
Topics: DTIC Archive, Masters, George W, NAVAL TEST PILOT SCHOOL PATUXENT RIVER MD, *ELECTRONIC...
The testing of Interference Blanker MX-1077(XA)/U under laboratory conditions is described. Performance tests were made. Tests were conducted under ground corona conditions, using the million-volt generator. Single sweep oscillographic photographs of blanker and blanking pulse output are shown. It was concluded that the blanker, as submitted, did not meet specification requirements and that further development work must be performed.
Topics: DTIC Archive, Holberger, Raymond R., AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OH COMMUNICATION...
The Strategic Defense Initiative (SDI) will be effective only if the Soviet Union cannot negate the defense system with countermeasures more cheaply than the U.S. can maintain the system's viability. Opponents of SDI feel that the Soviets will always be able to develop effective countermeasures (i.e. decoys, ASATs, fastburn boosters, and passive means). Proponents are confident American technology will be able to negate any Soviet attempts of thwarting SDI. This debate is complex and not easily...
Topics: DTIC Archive, AIR FORCE ACADEMY COLORADO SPRINGS CO, *DEFENSE SYSTEMS, *STRATEGIC DEFENSE...
The immediate scientific objective of this stimulated-emission-of-energetic-particles (SEEP) program is to experimentally establish the detailed relationship between ground-based VLF transmitter activity (i.e. operating frequency, signal strength, pulse duration and duty cycle) and the characteristics of the resulting particle precipitation (intensity, energy and pitch angle distribution). Once these relationships are established an assessment can be made of the feasibility of using controlled...
Topics: DTIC Archive, LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB, *BACKGROUND...
In 1972 the Fleet Electronic Warfare Support Group (FEWSG) prepared reports concerning surface Navy Electronic Counter-Countermeasures (ECCM) operational exercises. The exercises indicated an inadequate state of ECCM readiness. Efforts to improve the ECCM situation reported by FEWSG led the Chief of Naval Education and Training (CNET) in June 1974 to task the Training Analysis and Evaluation Group (TAEG) to conduct in analysis of surface Navy ECCM training. In April 1975, TAEG published the...
Topics: DTIC Archive, Pearson, Ted E., TRAINING ANALYSIS AND EVALUATION GROUP (NAVY) ORLANDO FL,...
The performance of sensor and communication systems can be limited significantly by hostile Electronic Counter Measures (ECM). These include passive measures such as radar and laser warning receivers, interception, emitter location systems as well as active measures such as jammers in various roles using different techniques and deception devices. The symposium covered ECCM ranging from frequency agility to spread spectrum and data fusion techniques for both sensor and communications systems.
Topics: DTIC Archive, ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRANCE),...
The bit and word error probabilities are analyzed for a frequency-hopping system that is being jammed while operating in a network of similar systems. The methodology allows straight-forward generalization to many variations not specifically discussed. Primary emphasis is given to a statistical deployment model in which interfering network hoppers are uniformly distributed beyond a minimum radius. Binary frequency-shift keying and minimum-shift keying are the data modulations studied in detail....
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
We report progress on the development of methods in a number of specific areas of application including static, non-cooperative games related to counter- and counter-counter-electromagnetic interrogation of targets, modeling of complex viscoelastic polymeric materials, stochastic and deterministic models for complex networks and development of inverse problem methodologies (generalized sensitivity functions; asymptotic standard errors) for estimation of infinite dimensional functional...
Topics: DTIC Archive, Banks, H T, NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC...
Frequency hopping (FH) is used by the military as an electronic counter-counter-measure (ECCM) technique. The carrier frequency is caused to vary from one value to another over a range of values in usually a random or pseudo-random manner. The message is converted to binary form. In slow FH, several bits are sent per hop. In fast FH, several hops occur per bit. This research considers use of analog messages (voice) with FH. No analog to digital conversion is used. An important consequence is...
Topics: DTIC Archive, Kardisan, Suwito, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *MESSAGE PROCESSING, *PSEUDO...
A thorough analysis is made of the uncoded probability of error achieved by by a hopped CPFSK (narrowband digital FM) radio link while subject to partial band noise jamming. Included in the analysis are the effects of thermal noise, FM clicks, and intersymbol interference, in addition to the jamming. For both limiter-discriminator and differential detection, it is shown that a repeat diversity combining method of summing detector samples does not yield a diversity gain against worst-case...
Topics: DTIC Archive, Miller, L E, LEE (J S) ASSOCIATES INC ARLINGTON VA, *INTERSYMBOL INTERFERENCE,...
The response of frequency-hopping systems to various types of jamming is examined. Fast and slow hopping are defined in terms of the information bit rate. The impact of coding on the jamming susceptibilities of fast and slow hopping systems is analyzed. The required conditions for effective repeater jamming and effective partial-band jamming are explored. Frequency hopping is compared with pseudonoise spread spectrum. The use of different types of data modulation with frequency hopping is...
Topics: DTIC Archive, Torrieri, Don J., ARMY MATERIEL DEVELOPMENT AND READINESSCOMMAND ADELPHI MD...
The transient sidelobe level of an adaptive array is a function of the external noise environment, the number of adaptive antenna elements, the adaptive algorithm employed, auxiliary antenna gain margins, and the number of samples used to calculate the adaptive weights. In this report, an analytical result for the adaptive sidelobe level is formulated for when the adaptive algorithm is the open-loop Sampled Matrix Inversion (SMI) algorithm. This result is independent of whether the SMI...
Topics: DTIC Archive, Gerlach, Karl, NAVAL RESEARCH LAB WASHINGTON DC, *ADAPTIVE FILTERS, *ANTENNA ARRAYS,...
The basic characteristics of various pseudonoise spread-spectrum systems are discussed with emphasis on direct-sequence modulation. A necessary condition is derived for the concealment of a pseudonoise waveform from detection. The condition establishes a lower bound for the pseudonoise code length. The bit error probability in the presence of various types of interference is determined. It is shown that if the total bandwidth and the word duration are fixed, the potential improvement in...
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
The technical objectives of this project are the design and demonstration of methods for the optimal management of sensor systems. As a specific application, we consider the nonlinear filtering of a vector diffusion process, with several noisy vector observations. Any number of sensors can be utilized in the signal processing performed by the nonlinear filter. The problem considered is the optimal selection of a schedule of these sensors from the available set, so as to optimally estimate a...
Topics: DTIC Archive, Blankenship, Gilmer, TECHNO-SCIENCES INC LANHAM MD, *SIGNAL PROCESSING,...
This report presents a derivation of the principal algorithms and an analysis of the performance of the two most important passive location systems for stationary transmitters: hyperbolic location systems and direction-finding location systems. The concentration ellipse, the circular error probable, and the geometric dilution of precision are defined and related to the location-system and received-signal characteristics. Doppler and other passive location systems are briefly discussed. (Author)
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
The present paper is devoted to the study of some properties of the distribution of the total portion of an arc length which is under shadow. The total portion of an arc which is under shadow (or under light) is a random variable having a distribution which is determined by the stochastic properties of the shadow casting objects. In the present Technical Report we show how the moments of this distribution can be determined. Explicit formulas are given for the expection and variance of the total...
Topics: DTIC Archive, Zacks,S, BATTELLE COLUMBUS LABS OHIO, *VISUAL SURVEILLANCE, *OPTICAL COUNTER...
Topics: DTIC Archive, James, W G, SRI INTERNATIONAL ARLINGTON VA, *ELECTRONIC COUNTERMEASURES, ELECTRONIC...
The theory of the acousto-optical interaction has been investigated in many papers. In this paper, the fundamental theory is used to develop a basic theory that explains the signal processing capabilities of Bragg cell devices. Examples of devices for frequency estimation, correlation, and Fourier transformation are presented. (Author)
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
This study attempts to show that the U.S. Army AIM division signal battalion can not provide reliable communications support when confronted with the current Soviet radioelectronic combat threat. The investigation is centered on the fact that the division maneuver commanders are not familiar with the difficulties and complexities of the communications-electronics mission in an electronic warfare environment and currently rely too heavily on electronic communications to maintain command and...
Topics: DTIC Archive, Williamson,John R, ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS, *MILITARY...
The performance of an M-ary orthogonal frequency-shift keying (MFSK) communication system employing fast frequency-hopped spread spectrum waveforms transmitted over a frequency-nonselective, slowly fading channel with partial- band interference is analyzed. A procedure referred to as noise-normalization combining is employed by the system receiver to minimize partial-band interference effects. Each hop is assumed to fade independently. The partial- band interference is modeled as a Gaussian...
Topics: DTIC Archive, Kragh, Melody, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *SECURE COMMUNICATIONS, *RADIO...
The accuracy and/or performance of navigation techniques has improved steadily since the early days of the cross staff and star sightings, and the current set of worldwide radionavigation systems has continued that trends. Loran-C, which became operational about 1960, has a location accuracy of 0.1-0. 25 nautical miles (nmi), but its range is limited to 1,000-2,000 nmi. Omega, which became operational about 1980, is less accurate (2-4 nmi) but provides true worldwide coverage. Transit, the...
Topics: DTIC Archive, Federhen, Herbert M, INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA, *RADIO NAVIGATION,...
This bibliography lists the Strategic Defense Initiative Organization Technical Information Management Center's holdings of publications pertaining to such topics as ballistic missile defense, arms control impact statements, beam weapons, strategic decision making, aluminum lithium alloys, laser weapons, military space policy, and radar electronic counter countermeasures.
Topics: DTIC Archive, STRATEGIC DEFENSE INITIATIVE ORGANIZATION WASHINGTON DC, *ANTIMISSILE DEFENSE...
The work presented in this report examined the feasibility of using maximum entropy spectral estimation techniques for demodulating frequency shift keyed signals in the presence of interfering signals and noise. Conventional frequency shift keyed demodulators derive an output representative of the instantaneous frequency, an output which can take only a single value at any instant. Spectral estimation allows multiple values of discrete frequencies to be resolved simultaneously. The ability to...
Topics: DTIC Archive, Van Meter,Robert Guy, STATE UNIV OF NEW YORK COLL AT ONEONTA DEPT OF MATHEMATICAL...
The theory of the acousto-optical interaction has been investigated in many papers. In this paper, the fundamental theory is used to develop a basic theory that explains the signal processing capabilities of Bragg cell devices. Examples of devices for frequency estimation, correlation, and Fourier transformation are presented. (Author)
Topics: DTIC Archive, Torrieri,Don J, ARMY MATERIEL DEVELOPMENT AND READINESS COMMAND ADELPHI MD...
This report discusses the development of statistical models for signals in the background radiance distribution. Techniques for analyzing multispectral line scan data are developed and demonstrated on background data obtained by the Environmental Research Institute of Michigan. Since the scope of the data is not adequate to provide statistically significant results, the conclusions are restricted to a presentation of the analytic method and a discussion of its potential applicability to more...
Topics: DTIC Archive, Pinson,L J, AUBURN UNIV ALA DEPT OF ELECTRICAL ENGINEERING, *TARGET DISCRIMINATION,...
This parasitic array is a promising method of building an adaptive array in a tiny aperture. This is particularly attractive for HF. Both theory and experimental results are presented. The theory is established with respect to two models of a compact array, an impedance model and a transmission line model. The relationship between the models are derived. The models are then used to explore the null forming and adaptive control, with an emphasis on active terminations. Zeger-Abrams designed an...
Topics: DTIC Archive, Jones,T E, ZEGER-ABRAMS INC GLENSIDE PA, *ADAPTIVE CONTROL SYSTEMS, *ANTENNAS,...
The performance of M-ary frequency-shift-keying frequency-hopping systems using multiple hops per symbol waveform is derived and evaluated for the cases of worst-case partial-band noise jamming and worst-case partial-band tone jamming. The analyses include the effects of the jamming under certain ECCM receiver design strategies. The receiver design strategies include the convention square-law linear combiner and the several types of unconventional nonlinear combiners. The ECCM receiver design...
Topics: DTIC Archive, Lee,J S, LEE (J S) ASSOCIATES INC ARLINGTON VA, *RECEIVERS, *FREQUENCY AGILITY,...
This volume provides background technical and programmatic information on the complex subject of how smart weapons (SW) are affected by countermeasures (CM) on the battlefield. It defines CMs as devices, techniques, or actions that respond to a specific weapon or capability. The volumes covers threat CMs and how US Army SW can be made more robust in a CM environment. It focuses on the technical details of threat CM classes. These are designated: signature alteration, decoys and deception;...
Topics: DTIC Archive, Borg, Eric J, DYNETICS INC HUNTSVILLE AL, *INFRARED SIGNATURES, *TARGET SIGNATURES,...
The introduction of the F-14, the Navy's newest fighter, into the fleet creates an additional demand on the fighter Naval Flight Officer (NFO) training pipeline. In an attempt to define this demand, this study compares the F-14 with the F-4 in terms of the operational functions required of the NFO in each aircraft. Using NFO advisors, and F-14 and F-4 publications, a Function Description Inventory (FDI) was created. The FDI consisted of the various tasks, duties, and roles comprising the...
Topics: DTIC Archive, Shelnutt, Jack B., NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL, *JOB ANALYSIS,...
The implementation of an autonomous smart weapon system, such as surface/air-to-air or surface/air-to-ground missiles presents an engineering challenge to the system and seeker/sensor designers. This is due to a wide variety of targets, backgrounds, countermeasures, and weather conditions expected for each scenario. The seeker/sensor design requires engineering tradeoffs by the designers, such as size constraints, detection/tracking performance, and search volume to name a few. All of these...
Topics: DTIC Archive, Chockley, J. H., DEFENSE MODELING SIMULATION AND TACTICAL TECHNOLOGY INFORMATION...
