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Aerospace and Electronic Systems, IEEE Transactions on

Issue 3 • Date Dec. 1965

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Displaying Results 1 - 24 of 24
  • Table of contents

    Publication Year: 1965 , Page(s): c1
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  • IEEE Aerospace and Electronic Systems Group

    Publication Year: 1965 , Page(s): c2
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  • From the Editors

    Publication Year: 1965 , Page(s): 205
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  • Omega

    Publication Year: 1965 , Page(s): 206 - 215
    Cited by:  Papers (11)  |  Patents (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3128 KB)  

    Omega is a navigation radio aid having worldwide coverage with good accuracy. By choosing among the phase-difference lines of position¿much as with celestial navigation¿high and uniform accuracy can be maintained. Developed and tested by USNEL and USNRL, Omega is introduced by a discussion of qualities not shared by Gee. Decca, or Loran. View full abstract»

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  • Hypersonic Re-Entry Optical Transfer Equations And Photographic Techniques

    Publication Year: 1965 , Page(s): 216 - 224
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2369 KB)  

    Radiation transfer equations applicable to various types of imaging instruments used against distant sources are presented. Emphasis is placed on measurements against point and line radiators made with instruments yielding image spectra. Framing and streaking cameras are discussed in terms of the overall transfer functions of the instrument and sensor. Calibration techniques used for absolute intensity measurements are shown to yield data within a factor of two of the actual value in most cases. The instruments described are of specific use in optical radiometry against bodies penetrating the earth's atmosphere in the hypervelocity regime, and are equally applicable to measurements in a ballistic range. For the problem of tracking these fast-moving objects, imaging instruments are preferred to point detector devices. View full abstract»

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  • Millimeter Radar Instrumentation

    Publication Year: 1965 , Page(s): 225 - 234
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4987 KB)  

    Millimeter wavelength radars are used to study plasma effects associated with ionized flow fields of projectiles launched at hypersonic speeds into a free-flight ballistic range. Two CW Doppler radars, at frequencies of 35 and 70 Gc/s, measure the nose-on backscattering radar cross sections during flight. The design and performance of the two radars are described in detail. A signal simulator provides absolute calibration. The purpose is to measure changes that occur in the radar cross sections of hypersonic projectiles caused by highly ionized flow fields. Under certain conditions the nose-on backscattering radar cross section of a blunt-nosed metal projectile decreases drastically when a thin, shock-produced layer of ionized gas covers the projectile. A theoretical analysis of this effect is given. Comparisons between theoretical predictions and experimental data show good correlation. View full abstract»

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  • On the Accuracy And Resolution of Radar Signals

    Publication Year: 1965 , Page(s): 235 - 245
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2679 KB)  

    Information matrices are derived for estimates of the range parameters of moving targets as obtained by combining a priori information (if available) with reflected radar signals observed in the presence of additive white Gaussian noise. The inverse of the information matrix provides a lower bound on the covariance matrix of any unbiased parameter estimates. This bound can be approached with a high signal-to-noise ratio and optimum data processing (matched filters). Arbitrary frequency modulation, amplitude modulation, and target motion as well as various assumptions on processing the RF phase are considered. The multiple-target case makes possible investigation of a signal's resolution ability, as well as its accuracy potentials. Results for a carrier frequency much greater than the effective signal bandwidth are obtained as a special case. A main purpose of the paper is the reduction of the original radar problem to a linear model which is equivalent in the sense of having the same information matrix. These models provide valuable insight into the relative effects of multiple targets, choice of modulation, a priori information, and assumptions regarding RF phase and bandwidth. The linear equivalent model also leads to a valuable computational algorithm for investigations using digital or hybrid computers. The various special cases of interest are obtained by simple modifications of the general case, and thus the algorithm can provide a very versatile tool for evaluating and designing radar signals. View full abstract»

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  • Studies of Logarithmic Radar Receiver Using Pulse-Length Discrimination

    Publication Year: 1965 , Page(s): 246 - 253
    Cited by:  Papers (8)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2004 KB)  

    Using a logarithmic amplifier giving a detected output followed by a high-pass filter is a technique for reducing adverse effects of distributed clutter in radar receivers. A pulse-length discriminator (PLD) used as the high-pass filter is treated here. Theoretical and experimental results for the loss in detectability introduced by this receiver, as compared with a matched filter or a good approximation thereto, have been obtained. For the case of single-hit detection, losses of 4 to 8 dB are introduced by the logarithmic amplifier/pulse-length discriminator (LOG AMP/PLD) combination; for post-detection integration, the losses are reduced to 2 to 4 dB. The latter values would apply where the LOG AMP/PLD output is presented on a PPI (plan position indicator). Some experimental results of the ability of the LOG AMP/PLD receiver to reject signals of incorrect pulse length show that signals exceeding the design pulse length by more than 25 to 50 percent are effectively suppressed. No significant short-pulse discrimination is obtained from the receiver. View full abstract»

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  • Command and Control

    Publication Year: 1965 , Page(s): 254 - 258
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (963 KB)  

    CCIS-70 is the Army's program for exploiting the application of ADP technology within its tactical environment. Some of the technical and philosophical management problem areas facing the project planners are outlined, and the Army's approach toward solving two representative problems is described in detail. View full abstract»

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  • A New Approach to Equipment Interconnection

    Publication Year: 1965 , Page(s): 259 - 271
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    A procedure for applying thoroughly tested data processing techniques to the solution of complex cabling problems is outlined. The problems are discussed briefly, and are followed by a description of the major steps required to solve them via automatic wiring list generation. The techniques resulted in the successful cabling of a large phased-array radar system. A number of proposed computerized techniques for solving equipment integration problems are also discussed. Such methods would provide greater engineering efficiency, lower system costs, and increased ability to meet critical schedules. View full abstract»

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  • Time Division Access for Military Communications Satellites

    Publication Year: 1965 , Page(s): 272 - 282
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2604 KB)  

    Simultaneous use of a single satellite repeater by several surface terminals is of considerable interest to the military user. A method of achieving multiple access by means of time division is described. Bursts of digital data from different surface terminals are interleaved in a manner that allows them to be identified and demodulated. A comparison is made between the access efficiency of time division and that of other methods of multiple access. It is shown that, for a range of conditions, time division compares favorably with the others. In addition, it has the major advantage of flexibility. The primary considerations in the design of a system are given and the pertinent relationships derived. These relationships are used to obtain the values of the system parameters for an Mustrative system model. The system described allows six different accesses at any one of three data rates, depending on the carrier-to-noise ratio. Finally, a system block diagram is given with a description of its operation. View full abstract»

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  • Frequency-Dependent Ionospheric Refraction Effects on the Doppler Shift of Satellite Signals

    Publication Year: 1965 , Page(s): 283 - 289
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2464 KB)  

    Analysis of four-frequency satellite Doppler data has allowed the separation and measurement of frequency-dependent ionospheric contributions to the Doppler shift, providing information useful in the study of errors incurred when tracking radio signals through the ionosphere. These refraction errors affect the accuracy of navigational position fixes obtained by Doppler satellite tracking systems. Some measured ionospheric refraction errors reported here are of interest because their magnitudes are significantly greater than those heretofore predicted from theoretical considerations. View full abstract»

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  • Thin-Film Rechargeable Solid-Electrolyte Batteries

    Publication Year: 1965 , Page(s): 290 - 296
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2236 KB)  

    A brief description of the basic oxidation-reduction processes taking place in the dry cell is used to show that substitution of solid electrolytes for conventional liquid electrolytes can enhance battery miniaturization potential without sacrifice of shelf life. Previously developed solid-electrolyte batteries, however, exhibited prohibitively high internal resistance. Solid-electrolyte batteries of the type Ag-AgI-Pt, working on concentration-cell rather than conventional oxidation- reduction principles, have significantly lower internal resistance. Such cells can be made quite small (possibly down to 0.002 cm3 per cell), have apparently excellent shelf life, and are operable at 100° C. More- over, they show a recharge capability. In addition, they appear amenable to development effort leading to a thin-film, printable battery with interesting application possibilities. View full abstract»

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  • Optimum Filters for Signal Detection in Clutter

    Publication Year: 1965 , Page(s): 297 - 299
    Cited by:  Papers (13)
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    First Page of the Article
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  • Processing Gain for Large Radar Targets

    Publication Year: 1965 , Page(s): 299 - 300
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  • On the Amplitude Statistics of Aircraft Radar Echoes

    Publication Year: 1965 , Page(s): 300 - 301
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  • Errata - "Hotshot wind tunnel force measurement"

    Publication Year: 1965 , Page(s): 301
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    Various corrections are made to the above-named work (ibid., vol. AES-1, No. 1, August 1965) affecting pages 6. View full abstract»

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  • M. Barry Carlton Award for 1965

    Publication Year: 1965 , Page(s): 302 - 307
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  • Call for Papers

    Publication Year: 1965 , Page(s): 307 - 308
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  • Pan-American Congress of Engineers Formally Established

    Publication Year: 1965 , Page(s): 308
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  • Subject index

    Publication Year: 1965 , Page(s): 308a - 308c
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  • Author Index

    Publication Year: 1965 , Page(s): 308c - 308d
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  • IEEE Aerospace And Electronic Systems Group

    Publication Year: 1965 , Page(s): 308-e
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  • Institutional listings

    Publication Year: 1965 , Page(s): 308f
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Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the equipment, procedures, and techniques applicable to the organization, installation, and operation of functional systems designed to meet the high performance requirements of earth and space systems.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory