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Aerospace and Electronic Systems, IEEE Transactions on

Issue 3 • Date May 1972

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Displaying Results 1 - 25 of 30
  • Table of contents

    Publication Year: 1972 , Page(s): c1 - 400-b
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    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1972 , Page(s): c2 - 400b
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    Freely Available from IEEE
  • From the Editors

    Publication Year: 1972 , Page(s): 257
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  • A Historical Survey of the Application of the Doppler Principle for Radio Navigation

    Publication Year: 1972 , Page(s): 258 - 263
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4950 KB)  

    The simple Doppler-shift formula fD = v/¿ shows that frequency changes (fD) useful for actual practice have to be based on either rapid changes of the distance between transmitter and receiver (v) or the application of very short waves (¿), and this with high frequency stability. Both conditions became feasible only during the last twenty years because of rapid technological progress. Some appli... View full abstract»

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  • Application of Electronic Data Processing Airport Analysis in Airlines Operations and for Manufacturers

    Publication Year: 1972 , Page(s): 264 - 268
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1968 KB)  

    An analysis of the factors affecting aircraft takeoff and landing weights is presented. This analysis, made with the aid of a computer, considers all factors, including: type of aircraft; weight; temperature; wind; engines; payload; policies; limits; runway slope, conditions, and length; obstructions; and aircraft flap settings. View full abstract»

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  • A Test of the Effect of Satellite Spin on Two-Way Doppler Range-Rate Measurements

    Publication Year: 1972 , Page(s): 269 - 272
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1686 KB)  

    Analysis indicates that the rotation of a satellite can cause an error in the range-rate measurements of a two-way Doppler tracking system. The error is proportional to the rotation rate, and the constant of proportionality depends on the polarization of the satellite transponder antennas. Measurements made by ground-based simulation confirmed the analytical prediction. View full abstract»

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  • Improved Antenna Systems for ILS Localizers

    Publication Year: 1972 , Page(s): 273 - 279
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3116 KB)  

    For many years Norwegian airports have been equipped with instrument landing system (ILS) localizers of conventional type. Most of the localizers, however, were found not to perform very well on these sites. The course bends were too large and even moderate amounts of snow and ice could cause the localizer to fall out of operation. To overcome these difficulties, the requirements for localizer ope... View full abstract»

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  • Theory of Operation of an Elastically Supported Tuned Gyroscope

    Publication Year: 1972 , Page(s): 280 - 288
    Cited by:  Papers (6)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2239 KB)  

    Detailed derivation of the transfer function for a multigimbal, elastically supported, tuned gyro is presented and comparison made between its characteristics and those of a classical two-axis, free-rotor gyro. Knowledge of the gyro transfer function is necessary for the purpose of servo analysis of the system in which the gyro is used; also, the transfer function is a basis of evaluation of error... View full abstract»

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  • Theory of Errors of a Multigimbal, Elastically Supported, Tuned Gyroscope

    Publication Year: 1972 , Page(s): 289 - 297
    Cited by:  Papers (4)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1327 KB)  

    An elastically supported, tuned gyroscope is a complex device, but experience has shown that it can be represented by mathematical models by means of which practically all of its characteristic errors can be analyzed and predicted with good accuracy. The gyro angular transfer function, derived in [1], serves as an excellent basis of evaluation of errors due to asymmetries of the gimballing system ... View full abstract»

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  • Tracking of DABS-Equipped Aircraft

    Publication Year: 1972 , Page(s): 298 - 305
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2168 KB)  

    The Discrete Address Beacon System (DABS) is scheduled to replace the Air Traffic Control Beacon System (ATCRBS) as the prime sensing tool for air traffic control in the 1980's. The design of DABS requires knowledge of the tracking accuracy obtainable as a function of various system parameters. In particular, the potential value of air-to-ground telemetry of turn-rate data and its effect on interm... View full abstract»

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  • Application of the Volterra Series to the Analysis and Design of an Angle Track Loop

    Publication Year: 1972 , Page(s): 306 - 318
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2733 KB)  

    A typical function of an angle tracking loop is to keep a radar antenna pointed at a target. The error in pointing is directly related to successful operation of the tracking device; therefore, its behavior is of interest. For a tracker with a general polynomial nonlinearity, an arbitrary initial pointing error, and a bounded deterministic input, a method is developed for finding upper bounds on t... View full abstract»

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  • Optimal Terminal Rendezvous as a Stochastic Differential Game Problem

    Publication Year: 1972 , Page(s): 319 - 326
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2125 KB)  

    The optimal terminal rendezvous of two satellites in orbit about the Earth is studied using a stochastic model and formulating the rendezvous as a game problem. Each satellite has noise-corrupted output measurements and uses a Kalman filter to generate the best estimate of the states describing the rendezvous. The optimal control for the satellites is determined. A comparison is made in terms of d... View full abstract»

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  • Estimation of Correlation Functions by Stochastic Approximation

    Publication Year: 1972 , Page(s): 327 - 337
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3243 KB)  

    Two techniques for estimating the correlation function of a stationary random process using the method of stochastic approximation are developed. Both provide updated estimates as successive T-second observations are processed. Both assume a functional form for the correlation function that depends on a number of parameters that are estimated. One technique is based on the mean-square error; the o... View full abstract»

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  • Range Correction Computations for Weapons Dropped from Aircraft

    Publication Year: 1972 , Page(s): 338 - 344
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2084 KB)  

    A general set of equations is developed from which the effects of initial condition perturbations upon weapon impact point are readily evaluated. Data are presented to illustrate the accuracy with which predictions can be made. Results obtained from the actual ballistic equations, from the time-varying perturbation equations, and from a time-invariant approximation of the perturbation equations ar... View full abstract»

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  • An Automatic Data Processing System for Laser Anemometers

    Publication Year: 1972 , Page(s): 345 - 349
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1816 KB)  

    An automatic data processing system for the evaluation of statistically occurring Doppler-difference bursts is described. In addition to the higher accuracy compared with the data acquisition procedures known so far, this technique allows the Doppler-difference method to be used as an operational instrument for investigations into turbulent flows, especially in the case of low particle density and... View full abstract»

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  • Envelope Estimation of AM Signals Transmitted Through a Randomly Dispersive Medium

    Publication Year: 1972 , Page(s): 350 - 354
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2071 KB)  

    The problem of designing a Wiener filter for the optimum processing of amplitude-modulated (AM) signals transmitted through randomly dispersive media is discussed. Results are obtained that provide effective least-mean-squared-error estimation of the input message when errors which do not represent loss of information are neglected. These results, which differ appreciably from the results that obt... View full abstract»

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  • Applications of Optimally Sensitive Control to Systems Involving Time-Varying Uncertainties

    Publication Year: 1972 , Page(s): 355 - 363
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3030 KB)  

    The implementation of control systems capable of identifying and adapting to time-varying unknown parameters has become increasingly important in air-traffic control and other applications. In the recent literature the control problem, in which both the initial state vector as well as a vector of constant plant parameters are unknown, has been treated utilizing sensitivity techniques referred to a... View full abstract»

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  • Proportional Navigation with a Maneuvering Target

    Publication Year: 1972 , Page(s): 364 - 371
    Cited by:  Papers (46)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2125 KB)  

    A qualitative analysis of the trajectories of a missile pursuing a maneuvering target according to the proportional navigation law is presented. Conditions for a missile to reach the target from any initial state are determined. The existence of a boundary for the required missile acceleration is demonstrated. View full abstract»

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  • Effect of Electrical Generator Parameters on Transient Suppressors

    Publication Year: 1972 , Page(s): 372 - 376
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1917 KB)  

    In vehicular and aircraft generating systems, the voltage transient suppressor requirements for protection of utilization loads are generally based on measured values of valtage transients and the generating system impedance. This paper presents an approximate method for determining the suppressor requirements that disregards the generating system impedance. When a voltage surge due to removal of ... View full abstract»

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  • Digital Simulations of Effects of Two-Antenna Interference on Space Vehicle Guidance

    Publication Year: 1972 , Page(s): 377 - 381
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (761 KB)  

    This study determines through digital simulations the effects of two-antenna interference, defined as interference occurring at the ground guidance system antenna between the signals from two antennas located on, opposite sides of a space vehicle. It is demonstrated that errors due to interference during early booster flight are recovered from at booster cutoff; interference produced errors occurr... View full abstract»

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  • Estimators of Generalized Chi-Square Parameters

    Publication Year: 1972 , Page(s): 381 - 382
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (282 KB)  

    The maximum likelihood estimators of the parameters of the genalized chi-square distribution are derived and approximated. These estimators are compared with those based on the method of moments. View full abstract»

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  • Overall Detection Probability for Fluctuating and Nonfluctuating Target Models

    Publication Year: 1972 , Page(s): 383 - 386
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (797 KB)  

    The power selection of a search radar is best obtained in the framework of the overall detection probability concept. This concept is here applied to fluctuating target models for single- and multiple-scan detection. The approach combines the pulse train statistics over the detection interval to the mean target statistics over the search region and directly relates the overall detection probabilit... View full abstract»

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  • Postdetection Integration Loss for Logarithmic Detectors

    Publication Year: 1972 , Page(s): 386 - 388
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (541 KB)  

    The effect of a logarithmic receiver on the detection performance of a radar has been determined by Green by numerical computations for up to 100 pulses integrated. It was further suggested that the loss in decibels as compared to a square-law detector would appear to be proportional to the logarithm of the number of pulses integrated. In this correspondence we show that this ¿conjecture¿ is fal... View full abstract»

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  • Landmark Navigation Rule, a New Navigation Device

    Publication Year: 1972 , Page(s): 388 - 391
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (716 KB)  

    Two new methods of landmark navigation were recently presented. The landmarks are assumed to be within sight of the navigator but with unknown positions. Both methods require computations which are time consuming when a computer is not available. This correspondence presents the concept of a new navigation device called ¿landmark navigation rule¿ which eliminates all the computation effort requi... View full abstract»

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  • Phase Detector Data Distortion in Phase-Lock Loop Receivers

    Publication Year: 1972 , Page(s): 391 - 393
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (703 KB)  

    The nonlinear characteristic of a sinusoidal phase detector can create an additional loop suppression factor and cause distortion of any phase-modulated data that is to be extracted in a phase-lock loop receiver. The distortion caused by the phase detector's sinusoidal characteristic will degrade the phase-lock loop parameters and decrease the amplitude of the phase-modulated data. View full abstract»

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Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment.  These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory