By Topic

Aerospace and Electronic Systems, IEEE Transactions on

Issue 1 • Date Jan. 1973

Filter Results

Displaying Results 1 - 25 of 27
  • Table of contents

    Publication Year: 1973 , Page(s): c1
    Save to Project icon | Request Permissions | PDF file iconPDF (876 KB)  
    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1973 , Page(s): c2 - 128b
    Save to Project icon | Request Permissions | PDF file iconPDF (1054 KB)  
    Freely Available from IEEE
  • From the Editors

    Publication Year: 1973 , Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (99 KB)  
    Freely Available from IEEE
  • Efficient Utilization of Orbit/Frequency for Satellite Broadcasting

    Publication Year: 1973 , Page(s): 2 - 10
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2385 KB)  

    In this paper some basic concepts involved in efficient orbit/spectrum utilization for broadcast satellites are discussed. A theoretical analysis leads to the determination of interference zones and minimum number of frequency channels required for homogeneous systems operating in the 800-MHz and 12-GHz bands. A crossed-beam arrangement of satellite systems is proposed, in which the beams from sat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Instrumentation for Air Quality Measurements

    Publication Year: 1973 , Page(s): 11 - 17
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1924 KB)  

    In the past several years growing emphasis on the environment has generated a minor revolution in the field of air quality instrumentation. New instruments have been appearing steadily and will no doubt continue to do so in the near future. While this new generation of instrumentation is being field tested, refined, and applied to air quality measurement problems, development of more sensitive and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Altitude Damping of Space-Stable Inertial Navigation Systems

    Publication Year: 1973 , Page(s): 18 - 27
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2273 KB)  

    In order to stabilize the altitude calculation in an inertial navigation system, an altimeter is commonly used. In a conventional local-level mechanization, this is generally accomplished by correcting the vertical channel integrators with the difference between the inertial system and altimeter indication of vertical position. However, in a space-stable system the procedure is not as clear since ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Comparison of Discrete Linear Filtering Algorithms

    Publication Year: 1973 , Page(s): 28 - 37
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2176 KB)  

    Seven filter algorithms were presented in a recent survey paper [2], and were compared computationally (operations count) when relatively few observations were to be processed. These algorithms are elaborated further in this paper. Details of the computations are presented, and it is shown that for problems with even moderately large amounts of data, the information matrix and square-root informat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Application of Digital Techniques to a VOR Signal Generator

    Publication Year: 1973 , Page(s): 38 - 42
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1945 KB)  

    The design of a high-accuracy digital VOR signal generator is described. The main part of the generator is formed of three digital sinewave generators, one of which is frequency modulated. The equations needed to design these generators are given and the practical realization based on read-only memories is described. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Now You See It, Now You Don't

    Publication Year: 1973 , Page(s): 43 - 50
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1994 KB)  

    The signal enhancement properties of a single-loop delayline integrator (DLI) are derived for operation in the presence of correlated noise. The signal is assumed periodic with a period equal to the delay of the DLI and present only for a finite time interval. The noise is assumed additive, zero mean, statistically independent from the signal, and present for an infinite time. The noise also is as... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Atmospheric Lens Effect; Another Loss for the Radar Range Equation

    Publication Year: 1973 , Page(s): 51 - 54
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1338 KB)  

    A small additional loss for radar range calculations at low grazing angles is described. This loss results because the variation in atmospheric refraction versus altitude makes the atmosphere act like a lens, causing thinning of radar signal energy to and from the target, independent of frequency. The magnitude of loss is derived and is plotted versus grazing angle and range. The maximum two-way l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Noise Performance of a Gated Phase-Locked Loop

    Publication Year: 1973 , Page(s): 55 - 58
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1307 KB)  

    The objectives of this paper are two. The first is to show that a gated phase-locked loop (GPLL) is a tracking device whose operation approximates that of a maximum likelihood estimator of the phase of a pulsed sinusoid imbedded in noise. The second is to determine the behavior of theb loop in the presence of noise. It is found that the loop performance is equivalent to that of a continuous phase-... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Repetitively Switched Circuits

    Publication Year: 1973 , Page(s): 59 - 64
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1474 KB)  

    The general problem of repetitively switched circuits is solved in closed form using a matrix formalism and eigenvalue techniques. The method is similar to that used in treating alternating gradient focusing in modern accelerators. As a simple example, this method is applied to a dc-dc converter power supply. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonlinear Filter Evaluation for Estimating Vehicle Position and Velocity Using Satellites

    Publication Year: 1973 , Page(s): 65 - 75
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2529 KB)  

    Approximate nonlinear filtering theory is applied to the estimation of vehicle position and velocity in three demensions using sequential range measurements to three known locations. The particular case studied is a satellite air traffic control system which utilizes range measurements to two geostationary satellites and an altitude measurement. Three approximate filters are examined as suboptimal... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Adaptive Estimation Algorithm for Time-Varying Bit Synchronizers

    Publication Year: 1973 , Page(s): 76 - 83
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2377 KB)  

    This paper presents an adaptive estimation algorithm for bit synchronization, assuming that the parameters of the incoming data process are time varying. The data are linearly related to the state variable to be determined. By employing the Gauss-Markov theorem, the optimal recursive estimate (including the nonstationary property of the system), which is a matrix operation on the transformed data,... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • False-Alarm Regulation in Log-Normal and Weibull Clutter

    Publication Year: 1973 , Page(s): 84 - 92
    Cited by:  Papers (83)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2091 KB)  

    Automatic detection radars require some method of adapting to variations in the background clutter in order to control their false-alarm rate. Conventional cell-averaging techniques designed to maintain a constant false-alarm rate in Rayleigh clutter will fail to control the false-alarm rate in more severe clutter environments such as log-normal or Weibull clutter. A processor is described which i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Clutter Spectra of Low PRF AMTI Pulse-Doppler Radar

    Publication Year: 1973 , Page(s): 93 - 103
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2807 KB)  

    Approximate expressions are derived for the video clutter spectra in the receiver of a low pulse repetition frequency (PRF), airborne moving target indicator (AMTI), pulse-Doppler radar for both step-scanning and continuous-scanning antennas. The receiver is assumed to process the received waveform with a clutter-tracking oscillator and a window function is employed to obtain short-term spectra. E... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Corrections of Satellite Positions in Near-Real Time

    Publication Year: 1973 , Page(s): 104 - 108
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (713 KB)  

    The influence of sudden increases of electron content on the accurate determination of the position of a satellite is investigated based on a spherically stratified ionospheric model. Using the total electron content information from Faraday rotation measurements, a procedure is presented whereby the corrections of satellite position due to the unpredicted electron increase can be accounted for wi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Nomographic Comparison of Coherent and Noncoherent Detection Statistics

    Publication Year: 1973 , Page(s): 108 - 110
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (456 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modification of "Radar Properties of Non-Rayleigh Sea Clutter"

    Publication Year: 1973 , Page(s): 110
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (186 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Note on CEPs

    Publication Year: 1973 , Page(s): 111 - 112
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (318 KB)  

    Simple analytical approximations are presented for normalized CEPs resulting from biased errors, and from unequal orthogonal variances, which are otherwise given only in the form of curves. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pulse Repetition Frequency Discriminator with Complete Harmonic Suppression

    Publication Year: 1973 , Page(s): 112 - 113
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (402 KB)  

    A method for selective pulse-train discrimination based on pulse repetition frequency (PRF) is presented. The technique permits acceptance of a pulse train with a desired PRF while rejecting all others, including those with pulse rates harmonically related to the desired one. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive Detection Probabilities for Fluctuating Target Models in Nonhomogeneous Gaussian Noise

    Publication Year: 1973 , Page(s): 113 - 115
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (475 KB)  

    Under the assumption that the average noise power may vary from cell to cell, new, more easily computed expressions are given for the probability of detecting a fluctuating target by means of a cell-averaging CFAR test. The generalized chi-square family of fluctuating targets is considered with the Swerling I and III models given as special cases. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Eascon'72

    Publication Year: 1973 , Page(s): 116 - 119
    Save to Project icon | Request Permissions | PDF file iconPDF (816 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ASSC '72

    Publication Year: 1973 , Page(s): 120 - 123
    Save to Project icon | Request Permissions | PDF file iconPDF (810 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Table of contents

    Publication Year: 1973 , Page(s): 124
    Save to Project icon | Request Permissions | PDF file iconPDF (69 KB)  
    Freely Available from IEEE

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