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IEEE Transactions on Aerospace and Electronic Systems

Issue 2 • Date March 1967

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Displaying Results 1 - 25 of 38
  • [Front cover]

    Publication Year: 1967, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1967
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  • [Breaker page]

    Publication Year: 1967, Page(s): nil1
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  • From the Editors

    Publication Year: 1967, Page(s): 153
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  • A Laser Device for Remote Vibration Measurement

    Publication Year: 1967, Page(s):154 - 157
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    A laboratory study has been made of concepts that utilize a laser for a vibration measurement device. The laser beam possesses the needed characteristics for a spatially directed carrier capable of detecting and transmitting vibration information to remote data processing equipment; furthermore, such a laser vibration measurement device can accomplish the measurement without mechanical contact wit... View full abstract»

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  • PCM Frame Synchronization with a Self-Varying Threshold

    Publication Year: 1967, Page(s):158 - 164
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1557 KB)

    An improved method for frame synchronization of PCM telemetered data is described and performance analyses are presented. This method is based on the utilization of a threshold detector whose level is selfvarying according to the characteristics of the received data. It is simple to implement and simpler from an operational point of view than the frame synchronizers currently in use in that a thre... View full abstract»

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  • Definitions of Effectiveness Terms: A Report on the Purpose and Contents of MIL-STD-721B

    Publication Year: 1967, Page(s):165 - 170
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1649 KB)

    The impact of the Systems Effectiveness concept upon U.S. military terminology required for acquisition of modern weapon systems necessitated a thorough revision of MIL-STD-721A and consolidation with MIL-STD-778 and MIL-STD447. Inclusion of a number of new terms and their definitions, as well as addition of standard definitions for terms on human factors and safety, was found to be necessary. The... View full abstract»

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  • A Model for the Radar Echo from a Random Collection of Rotating Dipole Scatterers

    Publication Year: 1967, Page(s):171 - 178
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1835 KB)

    A theoretical model for the radar echo from a random collection of dipole scatterers is presented. The analysis of the model takes into account the effects of scatterer rotation which have been neglected in previous related work. It is shown that rotational motion of the scaterers can have significant effects upon the echo waveform. The fluctuating characteristics of clutter echoes are also invest... View full abstract»

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  • Estimated Flight Time for Optimum Trajectories

    Publication Year: 1967, Page(s):179 - 185
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1505 KB)

    Various methods are presented for estimating the flight time for vehicles which fly an optimum trajectory. A realistic example is considered in order to display the inherent accuracy of each of these methods. Numerical integration methods are found to be the most accurate. Simple formulas are derived for the case where a less accurate estimate is acceptable. All of these methods require less compu... View full abstract»

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  • System Worth, System Effectiveness, Integrated Logistics Support, and Maintainability

    Publication Year: 1967, Page(s):186 - 194
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2161 KB)

    The system worth or cost effectiveness concept covers the measure of a system in terms of total dollar value. System worth encompasses the elements of system effectiveness (a quantitative measure of a system's technical ability) as well as cost. One of the elements of system effectiveness is maintainability. Maintainability is an effective mechanism for the accomplishment of planned maintenance du... View full abstract»

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  • Effect of Dimensions on the Efficiency of Radiant Energy Cells

    Publication Year: 1967, Page(s):195 - 201
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1594 KB)

    This paper deals with the enhancement of the quantum efficiency and photovoltaic energy conversion efficiency of a p-n semiconducting cell by optimizing the dimensions of the cell. Based on the Shockley-Read statistics a general expression for the quantum efficiency of monochromatic incident radiant energy photons has been derived in terms of the absorption coefficient of the incident photons, the... View full abstract»

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  • Aerial Mapping Planetary Bodies

    Publication Year: 1967, Page(s):202 - 206
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1839 KB)

    Photographic mapping missions over planetary bodies present a number of interesting hardware, operational, data retrieval, and data analysis techniques. Broadly speaking, such a mapping mission can be conducted with present level state-of-the-art equipment. The space-craft and photographic equipment must perform over long periods of time unattended in the hostile space environment. Operations must... View full abstract»

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  • Atmospheric Distortion of Signals Originating from Space Sources

    Publication Year: 1967, Page(s):207 - 216
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2578 KB)

    The phasefront distortion imposed on space signals by fine-grained refractivity variations of the atmosphere is an important consideration in the design of large-aperture antennas, antenna arrays, antenna systems for measuring spacecraft position and position-rate, and radioastronomy systems. The distortion caused by ionospheric and tropospheric refractivity variations imposes fundamental limitati... View full abstract»

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  • Synthetic Aperture Radar

    Publication Year: 1967, Page(s):217 - 229
    Cited by:  Papers (85)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2520 KB)

    The general theory of side-looking synthetic aperture radar systems is developed. A simple circuit-theory model is developed; the geometry of the system determines the nature of the prefilter and the receiver (or processor) is the postfilter. The complex distributed reflectivity density appears as the input, and receiver noise is first considered as the interference which limits performance. Analy... View full abstract»

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  • A Digital System for Accurate Time Sector Division of a Spin-Stabilized Vehicle

    Publication Year: 1967, Page(s):230 - 235
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2509 KB)

    This paper describes an aspect system flown on PIONEERS VI and VII2 which incorporates an extremely accurate adaptive digital computer in order to define rigorously equal time intervals which are submultiples of the spacecraft spin period. The several submultiples which compose the complete spin period exhibit equality to within 2.5 parts in 105. This system has potential applications in other exp... View full abstract»

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  • Telemetry Transmitters Using Solid-State Wideband Microwave Voltage-Controlled Oscillators

    Publication Year: 1967, Page(s):236 - 241
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2540 KB)

    A practical approach for meeting the immediate and future needs of communication systems that require very wideband transmitters capable of operating in the S-, C-, and X-band frequency ranges is described. Included are: 1) a review of the basic studies conducted to determine the most practical transmitter approach for wideband applications; 2) a discussion of a prototype 10-watt frequency-modulat... View full abstract»

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  • Synthesis of Computationally Efficient Sequential Linear Estimators

    Publication Year: 1967, Page(s):242 - 249
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1520 KB)

    The Kalman sequential linear estimation theory, although not always utilized because the number of computations required for many systems of practical importance becomes prohibitive, allows straight-forward synthesis of optimal estimators for many complex systems. Some systems designers have chosen to ignore variables and by such a reduction in system dimension have been able to economize with reg... View full abstract»

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  • Omnidirectional Instantaneous Direction Finding System

    Publication Year: 1967, Page(s):250 - 256
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3970 KB)

    A system for providing near-instantaneous determination of the azimuthal angle of arrival of a received signal has been designed and fabricated at L band. Direction is determined by phase measurement of the outputs of a multimode antenna, which has no moving parts. Effects of multipath interference are reduced to a minimum through a combination of signal processing techniques. The position of the ... View full abstract»

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  • A communications void - its cause and cure

    Publication Year: 1967, Page(s): 257
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    Freely Available from IEEE
  • Opening Remarks at the 2nd International Congress on Instrumentation in Aerospace Simulation Facilities

    Publication Year: 1967, Page(s): 258
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (234 KB)

    First Page of the Article
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  • Plasma Sheaths of Models in Hot-Shot Wind Tunnels

    Publication Year: 1967, Page(s):259 - 268
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2509 KB)

    The nitrogen flow characteristics around models is studied with a view to obtaining data which determine the physical state of the plasma. Among all possible techniques, the most adaptable to the special hot-shot conditions¿electrostatic probes and VHF microwave reflectometry¿is chosen. The experimental apparatus and results in nitrogen are described. The ionization is not homogenous during the ... View full abstract»

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  • Density and Temperature in Wind Tunnels Using Electron Beams

    Publication Year: 1967, Page(s):269 - 284
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3312 KB)

    In a paper presented at the last meeting of the International Congress on Instrumentation in Aerospace Simulation Facilities, a method of measuring gas density by radiation scattering was presented. Since that time, the method has been further developed using scattering of 50-keV electrons and has been applied in a wind tunnel using air as a test gas. Test section temperature and density were in t... View full abstract»

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  • Absolute Radiometer for the Flow Field of a Hypervelocity Projectile

    Publication Year: 1967, Page(s):285 - 296
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2460 KB)

    As part of a hypervelocity instrumentation development program, it was desirable to include a radiometer system for measuring absolute radiation from projectile flow fields. A system employing a photomultiplier tube was designed, and laboratory and range experiments were conducted to investigate its performance characteristics. The laboratory experiments show that the linearity, saturation, and no... View full abstract»

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  • In-Flight Mass Measurement of Small Fragments and Projectiles

    Publication Year: 1967, Page(s):297 - 302
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2271 KB)

    Penetration and cratering studies at hypervelocities make use, primarily, of light gas guns and explosive devices to accelerate projectiles for the impact study. The highest velocities achievable to date with other than micron-sized projectiles are obtained from explosive accelerators (shaped charge) or modified light gas guns incorporating a third stage. Such devices produce one or more randomly ... View full abstract»

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  • Doppler Radar for Impact Drag Measurements

    Publication Year: 1967, Page(s):303 - 308
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2594 KB)

    A Doppler radar tracking system has been used successfully to measure impact drag coefficients for several water-entry configurations. Hemisphere-cylinder and cone-cylinder models were launched vertically into a tank of water at velocities between 100 and 200 feet per second. These launchings were evaluation tests for a system to be used in a new facility at the Naval Ordnance Laboratory¿the Hydr... 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