A Phase Comparison Method Of Measuring The Direction Of Arrival Of Ionospheric Radio Waves
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A Phase Comparison Method Of Measuring The Direction Of Arrival Of Ionospheric Radio Waves
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Author : W. Ross
language : en
Publisher:
Release Date : 1951
A Phase Comparison Method Of Measuring The Direction Of Arrival Of Ionospheric Radio Waves written by W. Ross and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1951 with 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.
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).
Journal Of Research
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1961
Journal Of Research written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Ionospheric radio wave propagation categories.
Journal Of Research National Bureau Of Standards
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Author : United States. National Bureau of Standards
language : en
Publisher:
Release Date : 1964
Journal Of Research National Bureau Of Standards written by United States. National Bureau of Standards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Ionospheric radio wave propagation categories.
The Proceedings Of The Institution Of Electrical Engineers
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Author : Institution of Electrical Engineers
language : en
Publisher:
Release Date : 1951
The Proceedings Of The Institution Of Electrical Engineers written by Institution of Electrical Engineers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1951 with Electrical engineering categories.
Report Of The Research Council
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Author : Great Britain. Dept. of Scientific and Industrial Research
language : en
Publisher:
Release Date : 1947
Report Of The Research Council written by Great Britain. Dept. of Scientific and Industrial Research and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1947 with Research, Industrial categories.
Ionospheric Radio Propagation
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Author : Central Radio Propagation Laboratory (U.S.)
language : en
Publisher:
Release Date : 1948
Ionospheric Radio Propagation written by Central Radio Propagation Laboratory (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1948 with Atmosphere, Upper categories.
Nuclear Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1976-06
Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976-06 with Nuclear energy categories.
Nbs Technical Note
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Author :
language : en
Publisher:
Release Date : 1960
Nbs Technical Note written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Physical instruments categories.