Scheduled System Maintenance:
On May 6th, single article purchases and IEEE account management will be unavailable from 8:00 AM - 5:00 PM ET (12:00 - 21:00 UTC). We apologize for the inconvenience.
By Topic

Aerospace and Navigational Electronics, IEEE Transactions on

Issue 1 • Date March 1964

Filter Results

Displaying Results 1 - 18 of 18
  • IEEE Transactions on Aerospace and Navigational Electronics

    Publication Year: 1964 , Page(s): c1
    Save to Project icon | Request Permissions | PDF file iconPDF (868 KB)  
    Freely Available from IEEE
  • IEEE Professional Technical Group on Aerospace and Navigational Electronics

    Publication Year: 1964 , Page(s): c2
    Save to Project icon | Request Permissions | PDF file iconPDF (816 KB)  
    Freely Available from IEEE
  • Table of contents

    Publication Year: 1964 , Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (64 KB)  
    Freely Available from IEEE
  • The Doppler Twin Beacon

    Publication Year: 1964 , Page(s): 2 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1160 KB)  

    This radio aid to navigation differs from conventional radio beacons in the use of two spaced antenna arrays giving two separate directional radiation patterns. Preconditions and feasible solutions for the spatial separation of the arrays are shown. The use of the Doppler principle with its swing vs direction patterns permits transmission of the azimuth information independently of the carrier amplitude. This mode of operation precludes the disadvantages due to inhomogeneities in the two propagation paths established in the previously proposed split-antenna systems. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Doppler Navigation for Commercial Aircraft in the Domestic Environment

    Publication Year: 1964 , Page(s): 8 - 15
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1685 KB)  

    The need for an accurate knowledge of ground speed, drift angle and distance traveled from an initial fix has prompted the military to sponsor development of airborne Doppler navigation systems. As a result of the military development programs and the arrival of the semiconductor age, the size, weight, cost and reliability of the Doppler nagivation systems has made it attractive to commercial carriers for navigation over long distant water routes where ground-based radio navigational aids are not available. Most of the major commercial carriers have operated Doppler systems on an experimental basis and many have adapted a Doppler system operationally to their long distance navigation problems. Some users of Doppler find that the measurement of ground speed and drift angle is sufficient to meet their navigational requirements. Other users find it advantageous to couple Doppler derived measurements of ground speed and drift angle with heading and hand set course data to a navigational computer. The output information of such a computer is the integral of ground speed resolved into along course and cross distances traveled. The initial along course distance to the next way point and the magnetic course angle is normally set into the computer. When the computer indicates zero along course and zero cross-course miles, the aircraft has arrived at the way point, within the accuracy of the system. Most computers are mechanized so as to automatically transfer stages when the along course dial of the active stage reads zero. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Unlock Characteristics of the Optimum Type II Phase-Locked Loop

    Publication Year: 1964 , Page(s): 15 - 24
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1682 KB)  

    This paper describes a study of the statistical unlock characteristics of the commonly used optimum type II phase-locked loop taking into account the nonlinearity of the phase detector. The unlock behavior is investigated by simulating the loop with random noise inputs on a digital computer. A criterion of loop unlock is evolved using the phase portrait of the loop and consists of crossing of separatrices by loop error and a measure of loop error rate. Approximately 100 statistically independent trials were made for each of a number of combinations of initial phase error, initial frequency error, and input noise amplitude. From these computer runs, cumulative frequency distributions of unlock time and curves of mean time to unlock were obtained and are presented. The phase portrait of the loop containing time information also is included in the paper, along with a plot of capture characteristics for large initial frequency offsets. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Communications and the Supersonic Transport

    Publication Year: 1964 , Page(s): 25 - 36
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3936 KB)  

    This paper discusses some aspects of high altitude, supersonic flight which should be considered in the design of the SST communications system. Emphasis is placed on the need for a high degree of coordination between the flight crew, air traffic controller, meteorologist and dispatcher-performance specialist. A brief description of pertinent B-58 aircraft operational experience is offered in support of the suggestions made regarding the nature of the information which should be communicated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance Prediction Method for a Class of FM-CW Radars

    Publication Year: 1964 , Page(s): 36 - 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1026 KB)  

    In this paper the author has used the theory of zero crossings of random processes to analyze the errors due to receiver noise of a triangularly modulated FM-CW radar. Curves are given that can be used to determine the percentage error in the range measurement as a function of signal-to-noise ratio, provided the shape of the noise spectrum is known. The method of analysis is illustrated by predicting the performance of a particular radar, and is checked by comparing the calculations to system measurements. The theory can be used in the preliminary design stages to optimize the receiver design. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Correction [to "Some Astronomical and Geophysical Considerations for Space Navigation"]

    Publication Year: 1964 , Page(s): 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (81 KB)  

    Summary form only given, as follows. A.M. Naqvi and R.J. Levy, authors of "Some Astronomical and Geophysical Considerations for Space Navigation," which appeared on pp. 154-170 of the September, 1963, issue of these Transactions, have called the following to the attention of the Editor: 1) On p. 159, Fig. 5, the curves from top to bottom are for mpg=20, 15, 10 and 5, respectively. 2) On p. 167, Table XII, the entries are 100 Transmissivity (per cent). View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An FM-CW Radar for Simultaneous Three-Dimensional Velocity and Altitude Measurement

    Publication Year: 1964 , Page(s): 45 - 57
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3321 KB)  

    An FM-CW radar is described which simultaneously furnishes three-dimensional velocity and absolute altitude information. The velocity is measured by means of a low-frequency FM-CW Doppler technique, and the altitude information by means of phase comparison on one of the sidebands of the received spectrum. The optimum radar parameters required for the two functions are completely compatible. Use of the first-order sideband permits operation of the system down to zero feet altitude; use of the second order to very nearly zero feet. Offset reference frequency techniques and narrow-band leakage elimination techniques permit system operation through zero speed and to negative speeds. Contrary to that of conventional FM-CW altimeters, the altitude measurement technique is unaffected by amplitude noise and by frequency (Doppler) noise due to vehicle motion. The radar technique is particularly applicable to helicopters, VTOL aircraft, lunar landing vehicles and possibly also to satellite rendezvous. Actual flight test results have demonstrated the feasibility of the radar technique. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Influence of Random Phase Errors on the Angular Resolution of Synthetic Aperture Radar Systems

    Publication Year: 1964 , Page(s): 58 - 65
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1130 KB)  

    The influence of random phase errors on the angular resolution of a focused synthetic aperture radar system is treated. The principal measure of performance has been taken as the mean envelope power at the system output. This system output power is evaluated exactly, although not in closed form, based on the following assumptions: 1) the real beam pattern is Gaussian; 2) the random phase error is essentially a geometry-independent ergodic process with a Gaussian amplitude distribution and zero mean; and 3) the random phase error has a Gaussian correlation function. The curves presented in this paper can be used to estimate expected system power response, expected system resolution and effective aperture length beyond which, in the presence of phase error, little gain in resolution is expected. It was found that multiple sources of error with different correlation intervals make explicit solution of the integral equation for system power response practically impossible. In this situation, a reasonable approach is to evaluate the system power response separately for each error. If one of the errors is clearly dominant, it may be regarded as bounding achievable performance. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Binary Quantization of Signal Amplitudes: Effect for Radar Angular Accuracy

    Publication Year: 1964 , Page(s): 65 - 72
    Cited by:  Papers (27)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1307 KB)  

    An investigation made by P. Swerling [4] determining the limits that receiver noise imposes upon the accuracy with which the angular position of a target may be estimated by a pulsed search radar, is extended to determine additional accuracy limitations imposed by the quantization of signal strengths prior to angle estimation. This analysis follows that of Swerling in form. The results are presented in graphs. For many cases of practical interest, the additional limitation in accuracy may be neglected. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cancellation of Reflections Improves VOR Sites

    Publication Year: 1964 , Page(s): 73 - 74
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (216 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.
  • Abstracts

    Publication Year: 1964 , Page(s): 75 - 76
    Save to Project icon | Request Permissions | PDF file iconPDF (422 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Contributors

    Publication Year: 1964 , Page(s): 77 - 78
    Save to Project icon | Request Permissions | PDF file iconPDF (1692 KB)  
    Freely Available from IEEE
  • Application Form for Non-IEEE Members (Affiliates) IEEE Professional Technical Group on Aerospace and Navigational Electronics

    Publication Year: 1964 , Page(s): 78
    Save to Project icon | Request Permissions | PDF file iconPDF (676 KB)  
    Freely Available from IEEE
  • Suggestions to authors

    Publication Year: 1964 , Page(s): 78a
    Save to Project icon | Request Permissions | PDF file iconPDF (750 KB)  
    Freely Available from IEEE
  • Institutional listings

    Publication Year: 1964 , Page(s): 78b
    Save to Project icon | Request Permissions | PDF file iconPDF (728 KB)  
    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1965. The new retitled publication is IEEE Transactions on Aerospace and Electronic Systems.

Full Aims & Scope