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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Date July 1972

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Displaying Results 1 - 25 of 34
  • Table of contents

    Publication Year: 1972, Page(s):c1 - 574-123
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  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1972, Page(s):c2 - c4
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  • From the Editors

    Publication Year: 1972, Page(s): 401
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  • Several Questions I Always Wanted Answered About Remote Sensing, but Didn't Know Who to Ask

    Publication Year: 1972, Page(s):402 - 406
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1324 KB)

    This paper addresses some of the more important questions asked by managers and scientists associated with industry, foreign governments, and U.S. agencies regarding remote sensing. The difficulty in answering these questions is simply that no single view by any one of these groups alone provides enough perspective to do the questions justice. Consequently, this paper reflects an attempt to integr... View full abstract»

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  • The Role of Modern Sensor Applications in the United Nations Resource Exploration and Evaluation Programs

    Publication Year: 1972, Page(s):407 - 409
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1433 KB)

    In the first six months of 1971, the United Nations executed surveys using a number of the recently developed geophysical sensors on behalf of the United Nations Development Program in Ethiopia, Kenya, and Lesotho. The Ethiopia and Kenya surveys had the objective of direct exploration for and inventory of geothermal resources and involved coverage of some 39 000 km2 and 1550 km2, respectively, of ... View full abstract»

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  • Synthetic Aperture Imaging with Maneuvers

    Publication Year: 1972, Page(s):410 - 418
    Cited by:  Papers (21)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2078 KB)

    A digital processing approach has been devised for performing motion compensation in a high-resolution airborne synthetic aperture radar in the presence of simultaneous longitudinal (speed change), lateral (turn), and vertical (climb or dive) maneuvers. Both side-look and squint are accommodated in a unified scheme, which is validated by various simulation runs reported herein. Present attention i... View full abstract»

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  • System Analysis for an Airline Operational Environment Through a Computerized Network Simulation Model

    Publication Year: 1972, Page(s):419 - 427
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1734 KB)

    The computerized model permits a mixed fleet of aircraft to ¿fly¿ over a route structure for a given time period. By doing so, the detailed operational and economic factors are evaluated. In the past, the above-mentioned information was available after the purchase of the aircraft, and the selection of the airplane was done by little-known parameters. This program will furnish the data before th... View full abstract»

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  • Some Matched Filter Configurations for Infrared Systems

    Publication Year: 1972, Page(s):428 - 438
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2207 KB)

    An analysis of the output of three alternative matched filter configurations in an infrared scanning system model is presented. The sensor is corrupted by thermal noise, generation-recombination noise, photon noise, and modulation noise, the latter providing an extreme discoloration in the signal passband. Expressions for the signal voltage density spectrum, signal pulse shape, noise power spectru... View full abstract»

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  • In-Flight Alignment and Calibration of Inertial Measurement Units - Part I: General Formulation

    Publication Year: 1972, Page(s):439 - 449
    Cited by:  Papers (21)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2372 KB)

    This is the first part of a two-part paper which summarizes work pursued by the author in 1966 [1]. The paper describes the application of minimum-variance estimation techniques for in-flight alignment and calibration of an inertial measurement unit (IMU) relative to another IMU and/or some other reference. The first part formulates the problem, and the second part [2] reports numerical results an... View full abstract»

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  • In-Flight Alignment and Calibration of Inertial Measurement Units - Part II: Experimental Results

    Publication Year: 1972, Page(s):450 - 465
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2265 KB)

    This is the second part of a two-part paper which summarizes work pursued by the author in 1967 [2]. The paper describes the application of minimum-variance estimation techniques for in-flight alignment and calibration of an inertial measurement unit (IMU) relative to another IMU and/or some other reference. The first paper [1] formulates the problem, and this paper reports numerical results and a... View full abstract»

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  • Aperture Synthesis for Ionospherically Propagated HF Radio Signals

    Publication Year: 1972, Page(s):466 - 471
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2093 KB)

    A high-frequency (HF) aperture was synthesized by receiving ionospherically propagated signals in an airplane. The signals used the one-hop F lower ray mode to propagate a distance of 2600 km and were processed to yield equivalent aperture lengths of 10 km and 70 km. It was shown that apertures of up to 10 km in length could sometimes achieve their ideal free-space directivity without use of ionos... View full abstract»

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  • New Control Technique in dc/dc Regulators for Space Applications

    Publication Year: 1972, Page(s):472 - 480
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1552 KB)

    A new type of control loop is presented for dc/dc regulators, based on the use of a linear analog to pulsewidth modulator. This function, which is independent of operating frequency, permits high sampling frequencies. Combined with a limiter of the analog input, limitation characteristics are automatically available, without any extra sensing on the hot line. The independence of parameters f0 and ... View full abstract»

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  • System Security Research for the 1970's

    Publication Year: 1972, Page(s):481 - 485
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    Five basic needs for the improvement of system security are identified. Brief discussions are presented in the areas of system design, coordinated operation, more effective operation, and political- public relations problems. Recent results in the fifth basic need for system security, the development of more sophisticated approaches to the problems of system control, are presented. The results are... View full abstract»

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  • Markets and Models for Large-Scale Courseware Development

    Publication Year: 1972, Page(s):486 - 491
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2112 KB)

    Computer-aided instruction (CAI) has not achieved widespread use, even though experimental results have been promising, because of a complex of technical, economic, and social factors. The problems these factors produce might be overcome if a major ¿market success¿ could be achieved with CAI systems. One potentially high-volume market, having probably a lower resistance to profound innovation th... View full abstract»

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  • National and Regional Grids

    Publication Year: 1972, Page(s):492 - 497
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1998 KB)

    The title of this paper provides a point of departure for the broadest possible discussion of electric power transmission and presents an opportunity to comment on some misconceptions regarding power systems. The subject of transmission is discussed in terms of 1) the grid concept, 2) its system function, and 3) its probable future development and some of the problems facing such development. View full abstract»

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  • Power Generation - Some Tasks and Goals

    Publication Year: 1972, Page(s):498 - 504
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2494 KB)

    Generating capacity additions planned for the 1970's and beyond include a high percentage of nuclear power plants. The light water reactor is the dominant type of commercial nuclear reactor being installed during the 1970's. Advancement to more efficient designs, such as the high-temperature gas-cooled reactor, is expected around 1980. Prospects for the breeder reactor and fusion energy systems di... View full abstract»

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  • Report on the Geneva Space Telecommunications Conference - Broadcasting Aspects

    Publication Year: 1972, Page(s):505 - 509
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1979 KB)

    The growth of the Intelsat Global Commercial Communications Satellite System, which provides the facilities used to exchange television programs among many countries of the world, is described. Service was initiated between North America and Western Europe in 1965. Currently, some 48 separate geographic areas throughout the world are interconnected by the Intelsat System. The unique air-transporta... View full abstract»

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  • Technology and Education - Dream or Expectation?

    Publication Year: 1972, Page(s):510 - 516
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1396 KB)

    Technology will be utilized by the educational field, but only in those areas where it can be proven to be economically feasible. In the area of improving the quality of education, technology will be utilized only by those areas that can afford a large increase in expense. With the promise of reduced costs, and in the face of resistance by entrenched individuals and arguments regarding dehumanizat... View full abstract»

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  • Weighting Factor and Transmission Time Optimization in Video MTI Radar

    Publication Year: 1972, Page(s):517 - 527
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1755 KB)

    In an earlier paper by the author the problem of determining the optimum symmetrical weighting factors for a video MTI radar was discussed. This paper extends this work so as to remove the symmetrical restriction from the problem. In addition, for a staggered pulse system, optimum times of transmission are determined. In the earlier paper a global solution to the restricted optimization problem wa... View full abstract»

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  • A Hybrid Navigation Concept Using a Spinning Satellite-Borne Interferometer and Self-Contained Equipment

    Publication Year: 1972, Page(s):528 - 537
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1938 KB)

    This paper analyzes a hybrid navigation concept that uses signals from a radio interferometer mounted on a spinning geostationary satellite, preliminary position estimates from self-contained equipment, and stored a priori information on the past performance of this equipment. The craft-borne processor, optimum in the maximum a posteriori (MAP) sense, is designed to estimate position coordinates u... View full abstract»

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  • The 1971 Production Story: Final Report

    Publication Year: 1972, Page(s):538 - 540
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  • Delay-Lock Repeater Tracking System Utilizing Superregenerative Interrogator

    Publication Year: 1972, Page(s):541 - 545
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1528 KB)

    A unique delay¿lock tracking system is described. The system includes an interrogator and a repeater operating on the same radio frequency, with a pulse repetition rate which is related to the distance. Single radio frequency operation allows utilization of a superregenerative radio frequency stage, which serves as both the receiver and the transmitter of the interrogator unit. View full abstract»

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  • On the Optimum Squint Angles of Amplitude Monopulse Radar and Beacon Tracking Systems

    Publication Year: 1972, Page(s):545 - 547
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (546 KB)

    The different quantitative criteria (and numerical results) for analytically determining the optimum squint angle of an amplitude monopulse system in the track mode are compared and reconciled, and the results are generalized to include mutual coupling. View full abstract»

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  • Effect of Single-Bit Digitization in Adaptive Array Control Loops

    Publication Year: 1972, Page(s):547 - 549
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (362 KB)

    The properties of an adaptive array antenna, including transient response rate and control loop noise, depend on the intensity of the external noise field. The dependence can be reduced by 1-bit digitization of the real and imaginary parts of the signals from which the envelopes in the control loops are formed. This can be done without degrading the performance of the adaptive array. View full abstract»

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  • Simplified Method of Calculating Time from Launch to First Track Point for Known Value of g

    Publication Year: 1972, Page(s): 549
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (147 KB)

    The derivation of a simplified method of calculating the time from launch to the smoothed estimate of the first track point for a known value of g by least squares fitting a linear equation is presented. This method eliminates the need for the fifth accumulator, normally used for (Equation), as well as the need for processing this accumulated value in calculating the elevation velocity and positio... 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