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Aerospace and Electronic Systems, IEEE Transactions on

Issue 3 • Date May 1977

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Displaying Results 1 - 22 of 22
  • Table of contents

    Publication Year: 1977, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1977, Page(s):c2 - 42c
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  • From the Editors

    Publication Year: 1977, Page(s): 225
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  • The Blind Road to the New Despotism

    Publication Year: 1977, Page(s):226 - 229
    Cited by:  Papers (2)
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  • Practical Comparison of Iterative Matrix Orthogonalization Algorithms

    Publication Year: 1977, Page(s):230 - 235
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    In previous work several algorithms for orthogonalizing the direction cosine matrix were introduced and their convergence rate and range were theoretically investigated. Three of the most promising algorithms are examined in this paper. lt is shown that the so-called Dual Algorithm is by far superior to the other two from the point of view of speed, computer memory, accuracy, and convergence rate.... View full abstract»

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  • Kalman Estimation and Control of Dual-Spin Satellites

    Publication Year: 1977, Page(s):236 - 245
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    lt is necessary to maintain the spin axis of dual-spin geostationary communications satellites with nontracking ground antennas to within 0.1 degree of the orbit normal by periodic attitude corrections. Normally, the data for attitude estimation are determined from the analog sensor waveforms telemetered to the ground station. This information is supplied to the attitude determination program, whi... View full abstract»

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  • Computerized Model Demonstrating Magnetic Submarine Localization

    Publication Year: 1977, Page(s):246 - 254
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3053 KB)

    A modet is described which consists of an aircraft with flux gate magnetometers mounted on the wing tips and a submarine containing a magnet to simulate the induced and permanent fields of an actual submarine. Equations are developed which enable a minicomputer sampling the magnetometers to calculate the location, depth, and heading of the submarine as the aircraft travels towards it. The real tim... View full abstract»

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  • Reliability of the Station-Keeping Activator Subsystem of a Geostationary Satellite

    Publication Year: 1977, Page(s):255 - 263
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1796 KB)

    The reliability of the station-keeping activator subsystem of a geostationary satellite using electric thrusters is analyzed by modeling the probabilistic behavior of the system as a homogeneous Markov process. The method is applied to the particular case of a 400-kg satellite using 1.5-mN cesium contact electric thrusters. lt is shown that certain system configurations offer a mass improvement wi... View full abstract»

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  • A Distributed Intelligence Automatic Test System for PATRIOT

    Publication Year: 1977, Page(s):264 - 272
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3901 KB)

    An automatic test system supporting high volume production testing of diverse state-of-the-art electronic assemblies is described. The test complex consists of a centralized computer system communicating to a network of satellite stations, each structured as "Intelligent Test Centers" dedicated to a particular family of assemblies (e.g., analog, digital, microwave). Allocation of resources and tas... View full abstract»

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  • Adaptive Thresholding Systems

    Publication Year: 1977, Page(s):273 - 280
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1511 KB)

    The conditions under which adaptive thesholding should be employed are discussed. The three most important systems for accomplishing adaptive thresholding are the level adjuster, the constant-fraction discriminator, and the double differentiator. Practical implementations of these systems, including false alarm protection, are described in terms of subsystems. Approximate position variances associ... View full abstract»

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  • Mean Power Estimation with a Recursive Filter

    Publication Year: 1977, Page(s):281 - 289
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1382 KB)

    Power estimates from smoothed detector outputs of stationary signals are analyzed for linear, square law, and logarithmic receiverdetectors. Smoothing is accomplished with a first-order recursive digital filter. lnput amplitude is assumed to be Rayleigh distributed and detector output samples independent. Expansion of results to other distributions is indicated. View full abstract»

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  • Performance of a Square Law Pseudonoise Ranging Time-of-Arrival Estimator

    Publication Year: 1977, Page(s):290 - 301
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2136 KB)

    The performance of a square law time-of-arrival (TOA) estimator that has been proposed for use in ASTRO-DABS, part of a possible satellite-based fourth generation air traffic control system is considered. The transmitted message consists of a pulse amplitude modulated (PAM) ranging sequence that, due to transmitter characteristics, is corrupted by an unknown frequency offset. The optimum TOA estim... View full abstract»

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  • Limit Cycle in a Four Sectors On-Off Tracking Loop

    Publication Year: 1977, Page(s):302 - 309
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1128 KB)

    A simplified model of a bidimensional on-off tracking loop is introduced. By using geometric analysis in the time domain, it is shown that there is a simple mode of limit cycle which is stable in the loop for finite disturbances and for a finite range of change of the loop parameters. The consideration of the unsymmetric general case covers a wide class of cases in which the loop is subjected to c... View full abstract»

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  • Maneuvering Target Tracking Using Adaptive State Estimation

    Publication Year: 1977, Page(s):310 - 317
    Cited by:  Papers (91)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1542 KB)

    Two approaches to a nonlinear state estimation problem are presented. The particular problem addressed is that of tracking a maneuvering target in three-dimensional space using spherical observations (radar data). Both approaches rely on semi-Markov modeling of target maneuvers and result in effective algorithms that prevent the loss of track that often occurs when a target makes a sudden, radical... View full abstract»

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  • Phase Control in Multibeam Arrays

    Publication Year: 1977, Page(s):318 - 321
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The phases of the radiation fields in a multibeam antenna are analyzed and their relations to the feed network are established. A method of phase control is proposed and applied to the case of cophasal beams radiated from an array for which the feed network is a lossless Butler matrix. View full abstract»

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  • Comments on "Defending a Moving Target Against Missile or Topedo Attack"

    Publication Year: 1977, Page(s): 321
    Cited by:  Papers (4)
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  • Correlation Effects of MTI Filters

    Publication Year: 1977, Page(s):321 - 322
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (358 KB)

    A frequency domain approach for determining the effective number of independent pulses at the output of a square law detector in a moving target indicator (MTI) system leads to a definition which gives the same asymptotic results as given by a previous definition. View full abstract»

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  • Frequency Domain Interpolation

    Publication Year: 1977, Page(s):323 - 327
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    A formula is derived for interpolation between output samples of a fast Fourier transform (FFT), i.e., in the frequency domain. Such a formula is useful for obtaining greater frequency resolution when two coarse FFT outputs are available. Consideration is also given to the effect of such interpolation on a weighted FFT. View full abstract»

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  • Identification of a Ship or Submarine from its Magnetic Signature

    Publication Year: 1977, Page(s):327 - 329
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (525 KB)

    The relationship between the measured time fluctuations of the ambient magnetic field due to the passage of a ship or submarine and the characteristic magnetization properties of this vessel are derived. This relationship would be useful in identifying or classifying ships and submarines according to their magnetization properties. View full abstract»

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  • The Blind Road to the New Despotism: Part ll

    Publication Year: 1977, Page(s):329 - 336
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  • International Cumulative Index on Radar Systems: 1975-76 Update and Complete Author Index

    Publication Year: 1977, Page(s):i - 42
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  • Information for authors

    Publication Year: 1977, Page(s): 42a
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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