Journal•ISSN: 0096-1639
Ire Transactions on Aeronautical and Navigational Electronics
Institute of Electrical and Electronics Engineers
About: Ire Transactions on Aeronautical and Navigational Electronics is an academic journal. The journal publishes majorly in the area(s): Air traffic control & Radar. Over the lifetime, 143 publications have been published receiving 897 citations.
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TL;DR: In this article, a general method for identifying and evaluating magnetic sources associated with the magnetic airborne detector-equipped aircraft is described, which is derived for the compensation of magnetic noise related to the maneuvers of the aircraft.
Abstract: A general method for identifying and evaluating magnetic sources associated with the magnetic airborne detector-equipped aircraft is described. It is derived for the compensation of magnetic noise related to the maneuvers of the aircraft. Mathematical formulas are included with a uniform engineering method, that is independent of the type of magnetic source encountered, for analyzing magnetic airborne detector records. A method for calibrating magnetic sources while in flight is also offered.
149 citations
TL;DR: Although the bistatic radar has several interesting attributes, it is not as generally applicable as the more versatile monostatic radar because of the limited fence-type coverage and the difficulty of extracting target location information.
Abstract: This paper briefly describes some of the characteristics, capabilities, and limitations of the bistatic radar when used for the detection and location of targets such as aircraft or satellites. (A bistatic radar is one in which the receiver is physically separated from the transmitter so that the echo signal does not travel over the same path as the transmitted signal.) Among the topics discussed are the type of information available from the received signal, methods for extracting information from the bistatic radar signal, bistatic radar equation, target cross sections, and the properties of the bistatic radar fence. Throughout the paper the bistatic radar is continually compared to the conventional monostatic radar. It is concluded that although the bistatic radar has several interesting attributes, it is not as generally applicable as the more versatile monostatic radar because of the limited fence-type coverage and the difficulty of extracting target location information. An appendix is included which describes the multiple-frequency CW method for measuring distance as applied to either the bistatic or the monostatic radar.
74 citations
TL;DR: In this article, the theoretical error in measuring time delay (range) and Doppler frequency (relative velocity) for representative radar waveforms, including rectangular-, trapezoidal-, triangular-, and Gaussian-shaped pulses as well as the linear FM pulse compression waveform, was determined.
Abstract: The theoretical rms error in measuring time delay (range) and Doppler frequency (relative velocity) are determined for representative radar waveforms, including rectangular-, trapezoidal-, triangular-, and Gaussian-shaped pulses as well as the linear FM pulse compression waveform. The so-called ?uncertainty? relationship of radar is interpreted in terms of measurement errors and the difference between the radar and the quantum mechanical uncertainty principles is discussed. Mention is also made of the theoretical error involved in measuring the angle of arrival with an antenna aperture.
62 citations
TL;DR: In this article, the character and limitations of the velocity data provided by airborne Doppler velocity measuring systems are discussed and quantitative expressions for the frequency shift are derived, and it is shown that the signal is noiselike and has a spectrum which is centered at a doppler shifted frequency and has an appreciable bandwidth.
Abstract: This paper deals with airborne Doppler velocity measuring systems. In particular, it deals with the character and limitations of the velocity data provided by such systems. The Doppler effect is discussed and quantitative expressions for the frequency shift are derived. The relationship between the Doppler shift and aircraft velocity is such as to show that the fundamental capability of a Doppler system is the measurement, in the coordinate system of the aircraft, of one component of aircraft velocity for each beam of radiation employed. Certain effects of beam geometry on the measured velocity components are demonstrated quantitatively. The earth's surface as a medium for producing a radar return signal can be regarded as being constituted of a multitude of randomly situated scattering centers. The consequences of this as it bears on the nature and properties of the return signal are discussed. It is shown that the signal is noiselike and has a spectrum which is centered at a Doppler shifted frequency and which has an appreciable bandwidth. Outlines of theoretical methods for calculating the signal spectrum from a knowledge of antenna directional characteristics and other system and operational parameters are presented. It is shown that the frequency of the Doppler signal cannot be measured without error in a finite time.
55 citations
TL;DR: In this paper, a new application of the near field theory is described which permits determination of the relative bearing of one object with respect to another by a simple phase measurement without an additional reference signal.
Abstract: A new application of the near-field theory is described which permits determination of the relative bearing of one object with respect to another by a simple phase measurement without an additional reference signal. The same instrument is used to measure distance between the objects. The angle indication is independent of distance.
44 citations