Results 161 to 170 of about 86,535 (196)

Irregular regions in the Antarctic ionosphere

Journal of Geophysical Research, 1969
Irregular regions in Antarctic ionosphere from Polar Ionosphere Beacon Satellite S-66 recordings, obtaining irregularities density from nulls ...
J. E. Titheridge, G. F. Stuart
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The characteristics of large ionospheric irregularities

Journal of Atmospheric and Terrestrial Physics, 1968
Abstract The period of the Faraday fading of 20 Mc/s satellite signals was plotted throughout 521 transits of three different satellites, at heights of 200–1600 km. From these plots the size and electron content of 2650 separate irregularities were determined. The calculated sizes were spread evenly over the observable range from 10 to 400 km.
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The Shape of Irregularities in the Upper Ionosphere

Proceedings of the Physical Society. Section B, 1955
Observations of radio stellar scintillation on a frequency of 38 Mc/s were made with three spaced receivers. Suitable records were analysed to determine the average shape of the irregularities in the amplitude pattern on the ground. It was found on all occasions that the irregularities were elongated by a factor of at least 5:1, indicating that the ...
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Ionospheric irregularities and radio scintillations

Contemporary Physics, 1975
(1975). Ionospheric irregularities and radio scintillations. Contemporary Physics: Vol. 16, No. 5, pp. 469-488.
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Direct detection of ionospheric irregularity

Journal of Atmospheric and Terrestrial Physics, 1969
Abstract A device for the direct detection of ionospheric irregularities was flown on board the 1967-38A San Marco Satellite. This device utilizes the impedance fluctuation induced in the impedance of the satellite antenna by the irregularity. Features of the device as well as typical irregularities observed along the satellite orbits are presented.
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Theory of movement of irregularities in the ionosphere

Space Science Reviews, 1965
We review and criticize theoretical works on the movement of irregularities in the ionosphere. It is shown that the basic question of the problem has already been answered. We point out unsolved problems relative to growth and decay of irregularities in an application of the present theories.
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Topside irregularities in the equatorial ionosphere

Journal of Atmospheric and Terrestrial Physics, 1977
Abstract This paper is a brief review of ionospheric irregularities in the equatorial topside ionosphere. Results from topside sounders, direct measurement satellites, and the Jicamarca incoherent scatter radar are discussed. Scintillation observations and theories of irregularities are not discussed in detail as these are the subject of other review
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Reflexions from irregularities in the ionosphere

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1953
Abstract As part of the investigation of travelling disturbances in the ionosphere during four years, a close study has been made of small daytime changes in the virtual height of F-region reflexions with periods of 10 min to 1 h. In some cases, complex reflexions are observed.
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Ionospheric irregularities in the E-region

Journal of Atmospheric and Terrestrial Physics, 1972
Abstract Phase path measurements have been used to study E -region irregularities. Power spectral analysis of records taken when only one reflection point was present showed that the most prominent variations in phase path occurred at periods greater than a few minutes, with a spectral peak appearing at a period of about 5 min.
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On the Gravity Wave‐Seeded Ionospheric Irregularities in the Martian Ionosphere

Journal of Geophysical Research: Planets
Abstract For the past few decades, it has been demonstrated that gravity waves (GWs) and neutral winds can drive ionospheric irregularities on Earth. Still, as far as we know, the formation of ionospheric irregularities on Mars due to GWs has not been well studied.
Rong Tian, Chunhua Jiang, Beatriz Sánchez‐Cano, Wenjie Yin, Guobin Yang, Tongxin Liu, Yaogai Hu   +6 more
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