Results 171 to 180 of about 42,321 (217)

Ionospheric irregularities and scintillation

Advances in Space Research, 2003
Abstract One of the important research objectives of the Space Weather Program is to understand the structure and formation of ionospheric plasma-density irregularities that cause scintillation of radio waves on transionospheric links. In this paper we briefly review some aspects of scintillation and irregularities: the relationship between ...
A.W. Wernik, J.A. Secan, E.J. Fremouw
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Impacts of ionospheric scintillation on geosynchronous SAR

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
Geosynchronous Synthetic Aperture Radar (GEO SAR) will be affected by ionosphere scintillation inevitably because it usually works at L band. In this paper, GEO SAR signal model in presence of ionospheric scintillation is proposed. The scintillation sampling model is employed to simulate ionospheric scintillation data.
Yuanhao Li 0001, Cheng Hu 0001, Xichao Dong, Tao Zeng 0001, Teng Long 0001, Lixiang Ma, Xiaopeng Yang 0002   +6 more
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Phase scintillations at the polar ionosphere

2013 IEEE International Conference on Space Science and Communication (IconSpace), 2013
A dual-frequency GPS Ionospheric Scintillation and TEC Monitor (GISTM) receiver, GSV4004B, has been installed at Alert, Canada (82.48° N, 297.75° E, corresponding to 86.95° N, 155.77° E geomagnetic coordinate) since May 2008 to study the ionospheric variability at a high-latitude location.
M.J. Homam, E.M. Warrington, A.J. Stocker   +2 more
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Ionospheric scintillations at lunping

Journal of the Chinese Institute of Engineers, 1978
Abstract The ionospheric scintillation data obtained at Limping Observatory from January to June, 1976, were used to study the scintillation activity at the crest zone of the so‐called equatorial anomaly of foF2. Unusually large scintillation activity was found. Seasonally, the activity was largest in summer and smallest in winter.
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Ionospheric Scintillations of Satellite Signals

Proceedings of the IRE, 1960
The scintillation of satellite-emitted radio signals has been observed using two different techniques, namely, Doppler-shift frequency measurements and radio direction finding. In this shortened version of our complete paper, there are given the results obtained using Doppler-shift measurements only.
H. P. Hutchinson, P. R. Arendt
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Turbulence signatures in high--latitude ionospheric scintillation

Journal of Geophysical Research: Space Physics, 2022
Ground-based amplitude measurements of GNSS signal during ionospheric scintillation are analyzed using prevalent data analysis tools developed in the fields of fluid and plasma turbulence. One such tool is the structure function of order $q$, with $q = 1$ to $q = 6$, which reduces to the computation of the second order difference in the GPS signal ...
Karim Meziane, Abdelhaq M Hamza, P. T. Jayachandran   +2 more
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Quasiperiodic scintillation in the ionosphere

Journal of Atmospheric and Terrestrial Physics, 1972
Abstract The hypothesis is advanced that a regular cyclic type of fading seen occasionally on chart recordings of HF and VHF radio frequency signals that have penetrated the ionosphere is a special case of the more normal irregular ionospheric scintillation.
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Radio wave scintillations in the ionosphere

Proceedings of the IEEE, 1982
The phenomenon of scintillation of radio waves propagating through the ionosphere is reviewed in this paper. The emphasis is on propagational aspects, including both theoretical and experimental results. The review opens with a discussion of the motivation for stochastic formulation of the problem.
null Kung Chie Yeh, null Chao-Han Liu
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Spectra of ionospheric scintillation

Journal of Geophysical Research, 1976
Observations of amplitude and phase scintillation were made at the Millstone Hill radar facility by using phase coherent sources at 150 and 400 MHz on the U.S. Navy navigation system satellites. These observations have been processed to yield power spectra of the fluctuations in the logarithm of the received power (log power) at each frequency and the ...
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Multifrequency studies of ionospheric scintillations

Radio Science, 1977
Simultaneous scintillation data from the ATS‐6 Radio Beacon Experiments for signals at 40, 140, and 360 MHz offer the opportunity to study the frequency dependence of the scintillation phenomenon. Using these data variations of the spectral index, correlation coefficient, and the correlation interval are investigated.
R. Umeki, C. H. Liu, K. C. Yeh
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