A Proposed Index for Measuring Ionospheric Scintillation
A Proposed Index for Measuring Ionospheric Scintillation

Author: H. E. Whitney

Publisher:

Published: 1968

Total Pages: 28

ISBN-13:

DOWNLOAD EBOOK

Signals from radio star sources and satellites are regularly used for studying ionospheric irregularities. Amplitude and phase deviations can be imposed on the signals from these sources as they traverse the ionosphere. A parameter frequently used to describe the magnitude of this scintillation effect is scintillation index. An experiment was designed to correlate various methods of making scintillation measurements; observations were made at 40 MHz using the ionospheric beacon, S-66. It is shown that when the law of the receiver detector is known, a conversion method allows comparison of data and statistics on scintillation index. A simplified method of scaling scintillation index is described. The accuracy of the simplified method is determined by a comparison with measurements of scintillation index by machine computation.

The Propagation of Radio Waves
The Propagation of Radio Waves

Author: K. G. Budden

Publisher: Cambridge University Press

Published: 1988-08-04

Total Pages: 694

ISBN-13: 9780521369527

DOWNLOAD EBOOK

This book is concerned with the ionosphere and the magnetosphere, and the theory of their effect on radio waves. It includes accounts of some mathematical topics now widely used in this study, particularly W. K. B. approximations, Airy integral functions and integration by steepest descents. The subject is divided into ray theory and full wave theory. Ray theory is useful for high frequencies when the ionosphere is treated as a horizonally stratified medium. The discussion of the magnetosphere, whose structure is more complicated, includes an account of whistlers and ion cyclotron whistlers. The book has been planned both for final year undergraduates and as a reference book for research. It is suitable as a course book on radio propagation for students of physics or electrical engineering or mathematics. Some of the topics are presented from an elementary viewpoint so as to help undergraduates new to the subject. The later parts are more advanced. Because the subject is so large and has seen many important recent advances, some topics have had to be treated briefly, but there is a full bibliography with about 600 references.

Notes on the Relationship of Scintillation Index to Probability Distributions and Their Uses for System Design
Notes on the Relationship of Scintillation Index to Probability Distributions and Their Uses for System Design

Author: H. E. Whitney

Publisher:

Published: 1974

Total Pages: 28

ISBN-13:

DOWNLOAD EBOOK

The characterization of ionosphere scintillations in terms of scintillation index is discussed. Scintillation index cannot be directly applied to the design of systems that use transionospheric propagation. The relationships of scintillation index to system design parameters, cumulative amplitude distributions, and fade levels, are shown. The determination of a spectral index is explained and its use for extrapolating the results of ionosphere scintillation measurements to a desired frequency is shown.

Behavior of High-latitude Irregularities During Geomagnetic Disturbances
Behavior of High-latitude Irregularities During Geomagnetic Disturbances

Author: Zwi Houminer

Publisher:

Published: 1980

Total Pages: 22

ISBN-13:

DOWNLOAD EBOOK

Scintillation observations of VHF and UHF transmissions from geostationary satellites at Goose Bay have been used to study the average characteristics of the high latitude irregularity region. The paper describes the average time development and mean diurnal pattern of irregularities during 58 magnetic storms in 1971-1976. The diurnal variation at Goose Bay shows two peaks of scintillation activity. One peak occurs during the afternoon hours, while the second occurs during the night. The average diurnal pattern is independent of type of storm. diurnal and seasonal effects appear only in the first day of storm commencement and not in the following days which show a very similar diurnal picture.