Results 171 to 180 of about 2,215 (219)

Scintillation Effects in the Ionosphere

2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019
Statistical characteristics of scattered ordinary and extraordinary electromagnetic waves in the turbulent collision magnetized plasma caused by electron density fluctuations are calculated using modify smooth perturbation method taking into account both diffraction effects and polarization coefficients. Scintillation level is analyzed analytically and
George Jandieri, Akira Ishimaru, Jaromir Pistora, Michal Lesnak, Natalia Zhukova   +4 more
openaire   +1 more source

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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S 4 index: Does it only measure ionospheric scintillation?

GPS Solutions, 2017
The study of ionospheric scintillation has played a critical role in ionospheric research and also in satellite positioning. This is due to the growing influence of GNSS in navigation and remote sensing activities and also because the scintillation ...
Eniuce Menezes De Souza, João Francisco Galera Monico, Monico João Francisco Galera   +2 more
exaly   +2 more sources

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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Ionospheric scintillation observations at Natal

Journal of Geophysical Research: Space Physics, 1981
We report ionospheric scintillation observations made at Natal, Brazil, during a period of 2½ years. The nighttime scintillations of satellite signals at 250 MHz commonly exceeded 20 dB peak‐to‐peak. Seasonally, it showed a typical behavior for the South American sector with a single peak centered around October–November months and the local evening ...
K. C. Yeh, J. P. Mullen, J. R. Medeiros, R. F. da Silva, R. T. Medeiros   +4 more
openaire   +1 more source

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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Turbulence signatures in high--latitude ionospheric scintillation

Journal of Geophysical Research: Space Physics, 2022
Abstract Ground‐based amplitude measurements of Global Navigation Satellite System 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
Karim Meziane, Abdelhaq M Hamza, P. T. Jayachandran   +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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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
openaire   +1 more source