An Approach To Measuring The Direction Of Arrival Of Radio Waves In The Presence Of Wave Interference

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An Approach To Measuring The Direction Of Arrival Of Radio Waves In The Presence Of Wave Interference

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Author : Stephen Edward Cooper
language : en
Publisher:
Release Date : 1968

An Approach To Measuring The Direction Of Arrival Of Radio Waves In The Presence Of Wave Interference written by Stephen Edward Cooper and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with categories.

When two radio waves are reflected from the ionosphere and arrive at an antenna via two different elevation angles, the measurement of the angle of arrival of the stronger wave is influenced by the weaker interfering wave. This phenomenon is examined in detail, and an approach to measuring the elevation angle of the stronger wave is presented. In deriving completely general equations for the electric field in space, it is assumed that each wave is elliptically polarized and that they arrive at the antenna with a time phase difference, beta. An equation for the phase between the voltages induced in the antenna system is derived. This equation is analyzed using a digital computer to determine the effect of varying the relative field strength and beta. Assuming the angle of arrival of the stronger wave is desired, it is shown that the normal to the composite wavefront is in serious error with respect to this angle. The error is especially severe for beta near 180 degrees and for comparable field intensities. Since the polarization of each wave and beta are time dependent, the phase is averaged, assuming a random variation in beta and an arbitrary variation in polarization. It is shown that time averaging yields the phase associated with the elevation angle of the stronger wave, providing the stronger remained so throughout the averaging time. This is shown analytically and by use of a digital computer. (Author).

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Progress Report On Direction Of Arrival Of Radio Waves Report

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Author : University of Illinois at Urbana-Champaign. Electrical Engineering Research Laboratory
language : en
Publisher:
Release Date : 1951

Progress Report On Direction Of Arrival Of Radio Waves Report written by University of Illinois at Urbana-Champaign. Electrical Engineering Research Laboratory and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1951 with Radio waves categories.

U S Government Research Development Reports

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Author :
language : en
Publisher:
Release Date : 1968

U S Government Research Development Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Science categories.

Radio Direction Finding And Superresolution

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Author : P. J. D. Gething
language : en
Publisher: IET
Release Date : 1991

Radio Direction Finding And Superresolution written by P. J. D. Gething and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Science categories.

Enlarged and revised second edition. Modern direction finders, capable of measuring elevation angles as well as azimuth angles on the components of multi-ray wavefields, have become powerful tools for research in ionospheric physics and HF radio propagation. The complexity of the problem of resolving closely-spaced rays requires the combined use of wide aperture antenna arrays, multichannel receiving systems and sophisticated digital processing techniques.

U S Government Research And Development Reports Index

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Author :
language : en
Publisher:
Release Date : 1968

U S Government Research And Development Reports Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Nuclear science abstracts categories.

U S Government Research And Development Reports

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Author :
language : en
Publisher:
Release Date : 1968

U S Government Research And Development Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Science categories.

Government Wide Index To Federal Research Development Reports

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Author :
language : en
Publisher:
Release Date : 1968

Government Wide Index To Federal Research Development Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Science categories.

Government Reports Annual Index

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Author :
language : en
Publisher:
Release Date : 1987

Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Government reports announcements & index categories.

Studies In Time Averaging And Wave Interference In Radio Direction Finding

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Author : Murry Ira Glick
language : en
Publisher:
Release Date : 1966

Studies In Time Averaging And Wave Interference In Radio Direction Finding written by Murry Ira Glick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.

It is shown that a Watson-Watt direction finder operating under conditions of wave interference will give information allowing a digital bearing computer to determine the directions of arrival of a signal. It is shown that a two-element interferometer operating under conditions of wave interferences can be used with a digital bearing computer operating on one branch of an arc tangent function. This is used to propose a new type of interferometer designed specifically to work with a digital computer. (Author).